diff options
Diffstat (limited to 'drivers/rtc')
66 files changed, 1754 insertions, 936 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 83b4b89b9d5a..9d4290617cee 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -945,11 +945,11 @@ config RTC_DRV_DA9055 will be called rtc-da9055 config RTC_DRV_DA9063 - tristate "Dialog Semiconductor DA9063 RTC" - depends on MFD_DA9063 + tristate "Dialog Semiconductor DA9063/DA9062 RTC" + depends on MFD_DA9063 || MFD_DA9062 help If you say yes here you will get support for the RTC subsystem - of the Dialog Semiconductor DA9063. + for the Dialog Semiconductor PMIC chips DA9063 and DA9062. This driver can also be built as a module. If so, the module will be called "rtc-da9063". @@ -1116,6 +1116,13 @@ config RTC_DRV_OPAL This driver can also be built as a module. If so, the module will be called rtc-opal. +config RTC_DRV_ZYNQMP + tristate "Xilinx Zynq Ultrascale+ MPSoC RTC" + depends on OF + help + If you say yes here you get support for the RTC controller found on + Xilinx Zynq Ultrascale+ MPSoC. + comment "on-CPU RTC drivers" config RTC_DRV_DAVINCI @@ -1306,11 +1313,13 @@ config RTC_DRV_GENERIC just say Y. config RTC_DRV_PXA - tristate "PXA27x/PXA3xx" - depends on ARCH_PXA - help - If you say Y here you will get access to the real time clock - built into your PXA27x or PXA3xx CPU. + tristate "PXA27x/PXA3xx" + depends on ARCH_PXA + select RTC_DRV_SA1100 + help + If you say Y here you will get access to the real time clock + built into your PXA27x or PXA3xx CPU. This RTC is actually 2 RTCs + consisting of an SA1100 compatible RTC and the extended PXA RTC. This RTC driver uses PXA RTC registers available since pxa27x series (RDxR, RYxR) instead of legacy RCNR, RTAR. @@ -1456,6 +1465,18 @@ config RTC_DRV_JZ4740 This driver can also be buillt as a module. If so, the module will be called rtc-jz4740. +config RTC_DRV_LPC24XX + tristate "NXP RTC for LPC178x/18xx/408x/43xx" + depends on ARCH_LPC18XX || COMPILE_TEST + depends on OF && HAS_IOMEM + help + This enables support for the NXP RTC found which can be found on + NXP LPC178x/18xx/408x/43xx devices. + + If you have one of the devices above enable this driver to use + the hardware RTC. This driver can also be buillt as a module. If + so, the module will be called rtc-lpc24xx. + config RTC_DRV_LPC32XX depends on ARCH_LPC32XX tristate "NXP LPC32XX RTC" @@ -1523,6 +1544,7 @@ config RTC_DRV_MXC config RTC_DRV_SNVS tristate "Freescale SNVS RTC support" + select REGMAP_MMIO depends on HAS_IOMEM depends on OF help diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 1b09a62fcf4b..e491eb524434 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -74,6 +74,7 @@ obj-$(CONFIG_RTC_DRV_ISL12057) += rtc-isl12057.o obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o obj-$(CONFIG_RTC_DRV_JZ4740) += rtc-jz4740.o obj-$(CONFIG_RTC_DRV_LP8788) += rtc-lp8788.o +obj-$(CONFIG_RTC_DRV_LPC24XX) += rtc-lpc24xx.o obj-$(CONFIG_RTC_DRV_LPC32XX) += rtc-lpc32xx.o obj-$(CONFIG_RTC_DRV_LOONGSON1) += rtc-ls1x.o obj-$(CONFIG_RTC_DRV_M41T80) += rtc-m41t80.o @@ -158,3 +159,4 @@ obj-$(CONFIG_RTC_DRV_WM831X) += rtc-wm831x.o obj-$(CONFIG_RTC_DRV_WM8350) += rtc-wm8350.o obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o obj-$(CONFIG_RTC_DRV_XGENE) += rtc-xgene.o +obj-$(CONFIG_RTC_DRV_ZYNQMP) += rtc-zynqmp.o diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c index ea2a315df6b7..de86578bcd6d 100644 --- a/drivers/rtc/class.c +++ b/drivers/rtc/class.c @@ -202,6 +202,7 @@ struct rtc_device *rtc_device_register(const char *name, struct device *dev, rtc->max_user_freq = 64; rtc->dev.parent = dev; rtc->dev.class = rtc_class; + rtc->dev.groups = rtc_get_dev_attribute_groups(); rtc->dev.release = rtc_device_release; mutex_init(&rtc->ops_lock); @@ -234,12 +235,12 @@ struct rtc_device *rtc_device_register(const char *name, struct device *dev, err = device_register(&rtc->dev); if (err) { + /* This will free both memory and the ID */ put_device(&rtc->dev); - goto exit_kfree; + goto exit; } rtc_dev_add_device(rtc); - rtc_sysfs_add_device(rtc); rtc_proc_add_device(rtc); dev_info(dev, "rtc core: registered %s as %s\n", @@ -247,9 +248,6 @@ struct rtc_device *rtc_device_register(const char *name, struct device *dev, return rtc; -exit_kfree: - kfree(rtc); - exit_ida: ida_simple_remove(&rtc_ida, id); @@ -268,19 +266,17 @@ EXPORT_SYMBOL_GPL(rtc_device_register); */ void rtc_device_unregister(struct rtc_device *rtc) { - if (get_device(&rtc->dev) != NULL) { - mutex_lock(&rtc->ops_lock); - /* remove innards of this RTC, then disable it, before - * letting any rtc_class_open() users access it again - */ - rtc_sysfs_del_device(rtc); - rtc_dev_del_device(rtc); - rtc_proc_del_device(rtc); - device_unregister(&rtc->dev); - rtc->ops = NULL; - mutex_unlock(&rtc->ops_lock); - put_device(&rtc->dev); - } + mutex_lock(&rtc->ops_lock); + /* + * Remove innards of this RTC, then disable it, before + * letting any rtc_class_open() users access it again + */ + rtc_dev_del_device(rtc); + rtc_proc_del_device(rtc); + device_del(&rtc->dev); + rtc->ops = NULL; + mutex_unlock(&rtc->ops_lock); + put_device(&rtc->dev); } EXPORT_SYMBOL_GPL(rtc_device_unregister); @@ -363,7 +359,6 @@ static int __init rtc_init(void) } rtc_class->pm = RTC_CLASS_DEV_PM_OPS; rtc_dev_init(); - rtc_sysfs_init(rtc_class); return 0; } diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index 11b639067312..5836751b8203 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -564,7 +564,7 @@ enum hrtimer_restart rtc_pie_update_irq(struct hrtimer *timer) void rtc_update_irq(struct rtc_device *rtc, unsigned long num, unsigned long events) { - if (unlikely(IS_ERR_OR_NULL(rtc))) + if (IS_ERR_OR_NULL(rtc)) return; pm_stay_awake(rtc->dev.parent); diff --git a/drivers/rtc/rtc-88pm80x.c b/drivers/rtc/rtc-88pm80x.c index 7df0579d9852..466bf7f9a285 100644 --- a/drivers/rtc/rtc-88pm80x.c +++ b/drivers/rtc/rtc-88pm80x.c @@ -251,17 +251,26 @@ static SIMPLE_DEV_PM_OPS(pm80x_rtc_pm_ops, pm80x_rtc_suspend, pm80x_rtc_resume); static int pm80x_rtc_probe(struct platform_device *pdev) { struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent); - struct pm80x_platform_data *pm80x_pdata = - dev_get_platdata(pdev->dev.parent); - struct pm80x_rtc_pdata *pdata = NULL; + struct pm80x_rtc_pdata *pdata = dev_get_platdata(&pdev->dev); struct pm80x_rtc_info *info; + struct device_node *node = pdev->dev.of_node; struct rtc_time tm; unsigned long ticks = 0; int ret; - pdata = dev_get_platdata(&pdev->dev); - if (pdata == NULL) - dev_warn(&pdev->dev, "No platform data!\n"); + if (!pdata && !node) { + dev_err(&pdev->dev, + "pm80x-rtc requires platform data or of_node\n"); + return -EINVAL; + } + + if (!pdata) { + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + dev_err(&pdev->dev, "failed to allocate memory\n"); + return -ENOMEM; + } + } info = devm_kzalloc(&pdev->dev, sizeof(struct pm80x_rtc_info), GFP_KERNEL); @@ -327,11 +336,8 @@ static int pm80x_rtc_probe(struct platform_device *pdev) regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_RTC1_USE_XO, PM800_RTC1_USE_XO); - if (pm80x_pdata) { - pdata = pm80x_pdata->rtc; - if (pdata) - info->rtc_dev->dev.platform_data = &pdata->rtc_wakeup; - } + /* remember whether this power up is caused by PMIC RTC or not */ + info->rtc_dev->dev.platform_data = &pdata->rtc_wakeup; device_init_wakeup(&pdev->dev, 1); diff --git a/drivers/rtc/rtc-ab-b5ze-s3.c b/drivers/rtc/rtc-ab-b5ze-s3.c index b5cbc1bf5a3e..a319bf1e49de 100644 --- a/drivers/rtc/rtc-ab-b5ze-s3.c +++ b/drivers/rtc/rtc-ab-b5ze-s3.c @@ -1009,6 +1009,7 @@ static const struct of_device_id abb5zes3_dt_match[] = { { .compatible = "abracon,abb5zes3" }, { }, }; +MODULE_DEVICE_TABLE(of, abb5zes3_dt_match); #endif static const struct i2c_device_id abb5zes3_id[] = { @@ -1020,7 +1021,6 @@ MODULE_DEVICE_TABLE(i2c, abb5zes3_id); static struct i2c_driver abb5zes3_driver = { .driver = { .name = DRV_NAME, - .owner = THIS_MODULE, .pm = &abb5zes3_rtc_pm_ops, .of_match_table = of_match_ptr(abb5zes3_dt_match), }, diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c index 133d2e2e1a25..51407c4c7bd2 100644 --- a/drivers/rtc/rtc-ab8500.c +++ b/drivers/rtc/rtc-ab8500.c @@ -445,7 +445,9 @@ static const struct rtc_class_ops ab8540_rtc_ops = { static const struct platform_device_id ab85xx_rtc_ids[] = { { "ab8500-rtc", (kernel_ulong_t)&ab8500_rtc_ops, }, { "ab8540-rtc", (kernel_ulong_t)&ab8540_rtc_ops, }, + { /* sentinel */ } }; +MODULE_DEVICE_TABLE(platform, ab85xx_rtc_ids); static int ab8500_rtc_probe(struct platform_device *pdev) { diff --git a/drivers/rtc/rtc-abx80x.c b/drivers/rtc/rtc-abx80x.c index 4337c3bc6ace..afea84c7a155 100644 --- a/drivers/rtc/rtc-abx80x.c +++ b/drivers/rtc/rtc-abx80x.c @@ -28,7 +28,7 @@ #define ABX8XX_REG_WD 0x07 #define ABX8XX_REG_CTRL1 0x10 -#define ABX8XX_CTRL_WRITE BIT(1) +#define ABX8XX_CTRL_WRITE BIT(0) #define ABX8XX_CTRL_12_24 BIT(6) #define ABX8XX_REG_CFG_KEY 0x1f diff --git a/drivers/rtc/rtc-armada38x.c b/drivers/rtc/rtc-armada38x.c index 4b62d1a875e4..9a3f2a6f512e 100644 --- a/drivers/rtc/rtc-armada38x.c +++ b/drivers/rtc/rtc-armada38x.c @@ -40,13 +40,6 @@ struct armada38x_rtc { void __iomem *regs; void __iomem *regs_soc; spinlock_t lock; - /* - * While setting the time, the RTC TIME register should not be - * accessed. Setting the RTC time involves sleeping during - * 100ms, so a mutex instead of a spinlock is used to protect - * it - */ - struct mutex mutex_time; int irq; }; @@ -64,9 +57,9 @@ static void rtc_delayed_write(u32 val, struct armada38x_rtc *rtc, int offset) static int armada38x_rtc_read_time(struct device *dev, struct rtc_time *tm) { struct armada38x_rtc *rtc = dev_get_drvdata(dev); - unsigned long time, time_check; + unsigned long time, time_check, flags; - mutex_lock(&rtc->mutex_time); + spin_lock_irqsave(&rtc->lock, flags); time = readl(rtc->regs + RTC_TIME); /* * WA for failing time set attempts. As stated in HW ERRATA if @@ -77,7 +70,7 @@ static int armada38x_rtc_read_time(struct device *dev, struct rtc_time *tm) if ((time_check - time) > 1) time_check = readl(rtc->regs + RTC_TIME); - mutex_unlock(&rtc->mutex_time); + spin_unlock_irqrestore(&rtc->lock, flags); rtc_time_to_tm(time_check, tm); @@ -95,16 +88,16 @@ static int armada38x_rtc_set_time(struct device *dev, struct rtc_time *tm) if (ret) goto out; /* - * Setting the RTC time not always succeeds. According to the - * errata we need to first write on the status register and - * then wait for 100ms before writing to the time register to be - * sure that the data will be taken into account. + * According to errata FE-3124064, Write to RTC TIME register + * may fail. As a workaround, after writing to RTC TIME + * register, issue a dummy write of 0x0 twice to RTC Status + * register. */ - mutex_lock(&rtc->mutex_time); - rtc_delayed_write(0, rtc, RTC_STATUS); - msleep(100); + spin_lock_irqsave(&rtc->lock, flags); rtc_delayed_write(time, rtc, RTC_TIME); - mutex_unlock(&rtc->mutex_time); + rtc_delayed_write(0, rtc, RTC_STATUS); + rtc_delayed_write(0, rtc, RTC_STATUS); + spin_unlock_irqrestore(&rtc->lock, flags); out: return ret; @@ -229,7 +222,6 @@ static __init int armada38x_rtc_probe(struct platform_device *pdev) return -ENOMEM; spin_lock_init(&rtc->lock); - mutex_init(&rtc->mutex_time); res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rtc"); rtc->regs = devm_ioremap_resource(&pdev->dev, res); @@ -303,6 +295,7 @@ static const struct of_device_id armada38x_rtc_of_match_table[] = { { .compatible = "marvell,armada-380-rtc", }, {} }; +MODULE_DEVICE_TABLE(of, armada38x_rtc_of_match_table); #endif static struct platform_driver armada38x_rtc_driver = { diff --git a/drivers/rtc/rtc-as3722.c b/drivers/rtc/rtc-as3722.c index 9f38eda69154..56cc5821118b 100644 --- a/drivers/rtc/rtc-as3722.c +++ b/drivers/rtc/rtc-as3722.c @@ -45,7 +45,7 @@ static void as3722_time_to_reg(u8 *rbuff, struct rtc_time *tm) rbuff[1] = bin2bcd(tm->tm_min); rbuff[2] = bin2bcd(tm->tm_hour); rbuff[3] = bin2bcd(tm->tm_mday); - rbuff[4] = bin2bcd(tm->tm_mon); + rbuff[4] = bin2bcd(tm->tm_mon + 1); rbuff[5] = bin2bcd(tm->tm_year - (AS3722_RTC_START_YEAR - 1900)); } @@ -55,7 +55,7 @@ static void as3722_reg_to_time(u8 *rbuff, struct rtc_time *tm) tm->tm_min = bcd2bin(rbuff[1] & 0x7F); tm->tm_hour = bcd2bin(rbuff[2] & 0x3F); tm->tm_mday = bcd2bin(rbuff[3] & 0x3F); - tm->tm_mon = bcd2bin(rbuff[4] & 0x1F); + tm->tm_mon = bcd2bin(rbuff[4] & 0x1F) - 1; tm->tm_year = (AS3722_RTC_START_YEAR - 1900) + bcd2bin(rbuff[5] & 0x7F); return; } diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c index 35efd3f75b18..cb62e214b52a 100644 --- a/drivers/rtc/rtc-at91rm9200.c +++ b/drivers/rtc/rtc-at91rm9200.c @@ -18,20 +18,21 @@ * */ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/platform_device.h> -#include <linux/time.h> -#include <linux/rtc.h> #include <linux/bcd.h> +#include <linux/clk.h> +#include <linux/completion.h> #include <linux/interrupt.h> -#include <linux/spinlock.h> #include <linux/ioctl.h> -#include <linux/completion.h> #include <linux/io.h> -#include <linux/of.h> +#include <linux/kernel.h> +#include <linux/module.h> #include <linux/of_device.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/rtc.h> +#include <linux/spinlock.h> #include <linux/suspend.h> +#include <linux/time.h> #include <linux/uaccess.h> #include "rtc-at91rm9200.h" @@ -59,6 +60,7 @@ static bool suspended; static DEFINE_SPINLOCK(suspended_lock); static unsigned long cached_events; static u32 at91_rtc_imr; +static struct clk *sclk; static void at91_rtc_write_ier(u32 mask) { @@ -407,6 +409,16 @@ static int __init at91_rtc_probe(struct platform_device *pdev) return -ENOMEM; } + sclk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(sclk)) + return PTR_ERR(sclk); + + ret = clk_prepare_enable(sclk); + if (ret) { + dev_err(&pdev->dev, "Could not enable slow clock\n"); + return ret; + } + at91_rtc_write(AT91_RTC_CR, 0); at91_rtc_write(AT91_RTC_MR, 0); /* 24 hour mode */ @@ -420,7 +432,7 @@ static int __init at91_rtc_probe(struct platform_device *pdev) "at91_rtc", pdev); if (ret) { dev_err(&pdev->dev, "IRQ %d already in use.\n", irq); - return ret; + goto err_clk; } /* cpu init code should really have flagged this device as @@ -431,8 +443,10 @@ static int __init at91_rtc_probe(struct platform_device *pdev) rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &at91_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc)) - return PTR_ERR(rtc); + if (IS_ERR(rtc)) { + ret = PTR_ERR(rtc); + goto err_clk; + } platform_set_drvdata(pdev, rtc); /* enable SECEV interrupt in order to initialize at91_rtc_upd_rdy @@ -442,6 +456,11 @@ static int __init at91_rtc_probe(struct platform_device *pdev) dev_info(&pdev->dev, "AT91 Real Time Clock driver.\n"); return 0; + +err_clk: + clk_disable_unprepare(sclk); + + return ret; } /* @@ -454,6 +473,8 @@ static int __exit at91_rtc_remove(struct platform_device *pdev) AT91_RTC_SECEV | AT91_RTC_TIMEV | AT91_RTC_CALEV); + clk_disable_unprepare(sclk); + return 0; } diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c index 5ccaee32df72..7206e2fa4383 100644 --- a/drivers/rtc/rtc-at91sam9.c +++ b/drivers/rtc/rtc-at91sam9.c @@ -11,20 +11,20 @@ * 2 of the License, or (at your option) any later version. */ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/platform_device.h> -#include <linux/time.h> -#include <linux/rtc.h> +#include <linux/clk.h> #include <linux/interrupt.h> #include <linux/ioctl.h> -#include <linux/slab.h> -#include <linux/platform_data/atmel.h> #include <linux/io.h> +#include <linux/kernel.h> #include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> #include <linux/regmap.h> +#include <linux/rtc.h> +#include <linux/slab.h> #include <linux/suspend.h> -#include <linux/clk.h> +#include <linux/time.h> /* * This driver uses two configurable hardware resources that live in the @@ -425,18 +425,19 @@ static int at91_rtc_probe(struct platform_device *pdev) if (IS_ERR(rtc->sclk)) return PTR_ERR(rtc->sclk); - sclk_rate = clk_get_rate(rtc->sclk); - if (!sclk_rate || sclk_rate > AT91_RTT_RTPRES) { - dev_err(&pdev->dev, "Invalid slow clock rate\n"); - return -EINVAL; - } - ret = clk_prepare_enable(rtc->sclk); if (ret) { dev_err(&pdev->dev, "Could not enable slow clock\n"); return ret; } + sclk_rate = clk_get_rate(rtc->sclk); + if (!sclk_rate || sclk_rate > AT91_RTT_RTPRES) { + dev_err(&pdev->dev, "Invalid slow clock rate\n"); + ret = -EINVAL; + goto err_clk; + } + mr = rtt_readl(rtc, MR); /* unless RTT is counting at 1 Hz, re-initialize it */ @@ -451,8 +452,10 @@ static int at91_rtc_probe(struct platform_device *pdev) rtc->rtcdev = devm_rtc_device_register(&pdev->dev, pdev->name, &at91_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc->rtcdev)) - return PTR_ERR(rtc->rtcdev); + if (IS_ERR(rtc->rtcdev)) { + ret = PTR_ERR(rtc->rtcdev); + goto err_clk; + } /* register irq handler after we know what name we'll use */ ret = devm_request_irq(&pdev->dev, rtc->irq, at91_rtc_interrupt, @@ -460,7 +463,7 @@ static int at91_rtc_probe(struct platform_device *pdev) dev_name(&rtc->rtcdev->dev), rtc); if (ret) { dev_dbg(&pdev->dev, "can't share IRQ %d?\n", rtc->irq); - return ret; + goto err_clk; } /* NOTE: sam9260 rev A silicon has a ROM bug which resets the @@ -474,6 +477,11 @@ static int at91_rtc_probe(struct platform_device *pdev) dev_name(&rtc->rtcdev->dev)); return 0; + +err_clk: + clk_disable_unprepare(rtc->sclk); + + return ret; } /* @@ -487,8 +495,7 @@ static int at91_rtc_remove(struct platform_device *pdev) /* disable all interrupts */ rtt_writel(rtc, MR, mr & ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN)); - if (!IS_ERR(rtc->sclk)) - clk_disable_unprepare(rtc->sclk); + clk_disable_unprepare(rtc->sclk); return 0; } diff --git a/drivers/rtc/rtc-bfin.c b/drivers/rtc/rtc-bfin.c index 3d44b11721ea..535a5f9338d0 100644 --- a/drivers/rtc/rtc-bfin.c +++ b/drivers/rtc/rtc-bfin.c @@ -361,7 +361,7 @@ static int bfin_rtc_probe(struct platform_device *pdev) /* Register our RTC with the RTC framework */ rtc->rtc_dev = devm_rtc_device_register(dev, pdev->name, &bfin_rtc_ops, THIS_MODULE); - if (unlikely(IS_ERR(rtc->rtc_dev))) + if (IS_ERR(rtc->rtc_dev)) return PTR_ERR(rtc->rtc_dev); /* Grab the IRQ and init the hardware */ diff --git a/drivers/rtc/rtc-bq32k.c b/drivers/rtc/rtc-bq32k.c index 92679df6d6e2..0299988b4f13 100644 --- a/drivers/rtc/rtc-bq32k.c +++ b/drivers/rtc/rtc-bq32k.c @@ -212,7 +212,7 @@ static int bq32k_probe(struct i2c_client *client, if (error) return error; - if (client && client->dev.of_node) + if (client->dev.of_node) trickle_charger_of_init(dev, client->dev.of_node); rtc = devm_rtc_device_register(&client->dev, bq32k_driver.driver.name, @@ -234,7 +234,6 @@ MODULE_DEVICE_TABLE(i2c, bq32k_id); static struct i2c_driver bq32k_driver = { .driver = { .name = "bq32k", - .owner = THIS_MODULE, }, .probe = bq32k_probe, .id_table = bq32k_id, diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c index a82556a0757a..8f7034ba7d9e 100644 --- a/drivers/rtc/rtc-cmos.c +++ b/drivers/rtc/rtc-cmos.c @@ -41,7 +41,6 @@ #include <linux/pm.h> #include <linux/of.h> #include <linux/of_platform.h> -#include <linux/dmi.h> /* this is for "generic access to PC-style RTC" using CMOS_READ/CMOS_WRITE */ #include <asm-generic/rtc.h> @@ -51,6 +50,7 @@ struct cmos_rtc { struct device *dev; int irq; struct resource *iomem; + time64_t alarm_expires; void (*wake_on)(struct device *); void (*wake_off)(struct device *); @@ -377,53 +377,11 @@ static int cmos_set_alarm(struct device *dev, struct rtc_wkalrm *t) spin_unlock_irq(&rtc_lock); - return 0; -} - -/* - * Do not disable RTC alarm on shutdown - workaround for b0rked BIOSes. - */ -static bool alarm_disable_quirk; + cmos->alarm_expires = rtc_tm_to_time64(&t->time); -static int __init set_alarm_disable_quirk(const struct dmi_system_id *id) -{ - alarm_disable_quirk = true; - pr_info("BIOS has alarm-disable quirk - RTC alarms disabled\n"); return 0; } -static const struct dmi_system_id rtc_quirks[] __initconst = { - /* https://bugzilla.novell.com/show_bug.cgi?id=805740 */ - { - .callback = set_alarm_disable_quirk, - .ident = "IBM Truman", - .matches = { - DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), - DMI_MATCH(DMI_PRODUCT_NAME, "4852570"), - }, - }, - /* https://bugzilla.novell.com/show_bug.cgi?id=812592 */ - { - .callback = set_alarm_disable_quirk, - .ident = "Gigabyte GA-990XA-UD3", - .matches = { - DMI_MATCH(DMI_SYS_VENDOR, - "Gigabyte Technology Co., Ltd."), - DMI_MATCH(DMI_PRODUCT_NAME, "GA-990XA-UD3"), - }, - }, - /* http://permalink.gmane.org/gmane.linux.kernel/1604474 */ - { - .callback = set_alarm_disable_quirk, - .ident = "Toshiba Satellite L300", - .matches = { - DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), - DMI_MATCH(DMI_PRODUCT_NAME, "Satellite L300"), - }, - }, - {} -}; - static int cmos_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct cmos_rtc *cmos = dev_get_drvdata(dev); @@ -432,9 +390,6 @@ static int cmos_alarm_irq_enable(struct device *dev, unsigned int enabled) if (!is_valid_irq(cmos->irq)) return -EINVAL; - if (alarm_disable_quirk) - return 0; - spin_lock_irqsave(&rtc_lock, flags); if (enabled) @@ -512,13 +467,6 @@ cmos_nvram_read(struct file *filp, struct kobject *kobj, { int retval; - if (unlikely(off >= attr->size)) - return 0; - if (unlikely(off < 0)) - return -EINVAL; - if ((off + count) > attr->size) - count = attr->size - off; - off += NVRAM_OFFSET; spin_lock_irq(&rtc_lock); for (retval = 0; count; count--, off++, retval++) { @@ -543,12 +491,6 @@ cmos_nvram_write(struct file *filp, struct kobject *kobj, int retval; cmos = dev_get_drvdata(container_of(kobj, struct device, kobj)); - if (unlikely(off >= attr->size)) - return -EFBIG; - if (unlikely(off < 0)) - return -EINVAL; - if ((off + count) > attr->size) - count = attr->size - off; /* NOTE: on at least PCs and Ataris, the boot firmware uses a * checksum on part of the NVRAM data. That's currently ignored @@ -860,6 +802,51 @@ static void __exit cmos_do_remove(struct device *dev) cmos->dev = NULL; } +static int cmos_aie_poweroff(struct device *dev) +{ + struct cmos_rtc *cmos = dev_get_drvdata(dev); + struct rtc_time now; + time64_t t_now; + int retval = 0; + unsigned char rtc_control; + + if (!cmos->alarm_expires) + return -EINVAL; + + spin_lock_irq(&rtc_lock); + rtc_control = CMOS_READ(RTC_CONTROL); + spin_unlock_irq(&rtc_lock); + + /* We only care about the situation where AIE is disabled. */ + if (rtc_control & RTC_AIE) + return -EBUSY; + + cmos_read_time(dev, &now); + t_now = rtc_tm_to_time64(&now); + + /* + * When enabling "RTC wake-up" in BIOS setup, the machine reboots + * automatically right after shutdown on some buggy boxes. + * This automatic rebooting issue won't happen when the alarm + * time is larger than now+1 seconds. + * + * If the alarm time is equal to now+1 seconds, the issue can be + * prevented by cancelling the alarm. + */ + if (cmos->alarm_expires == t_now + 1) { + struct rtc_wkalrm alarm; + + /* Cancel the AIE timer by configuring the past time. */ + rtc_time64_to_tm(t_now - 1, &alarm.time); + alarm.enabled = 0; + retval = cmos_set_alarm(dev, &alarm); + } else if (cmos->alarm_expires > t_now + 1) { + retval = -EBUSY; + } + + return retval; +} + #ifdef CONFIG_PM static int cmos_suspend(struct device *dev) @@ -1094,8 +1081,12 @@ static void cmos_pnp_shutdown(struct pnp_dev *pnp) struct device *dev = &pnp->dev; struct cmos_rtc *cmos = dev_get_drvdata(dev); - if (system_state == SYSTEM_POWER_OFF && !cmos_poweroff(dev)) - return; + if (system_state == SYSTEM_POWER_OFF) { + int retval = cmos_poweroff(dev); + + if (cmos_aie_poweroff(dev) < 0 && !retval) + return; + } cmos_do_shutdown(cmos->irq); } @@ -1200,8 +1191,12 @@ static void cmos_platform_shutdown(struct platform_device *pdev) struct device *dev = &pdev->dev; struct cmos_rtc *cmos = dev_get_drvdata(dev); - if (system_state == SYSTEM_POWER_OFF && !cmos_poweroff(dev)) - return; + if (system_state == SYSTEM_POWER_OFF) { + int retval = cmos_poweroff(dev); + + if (cmos_aie_poweroff(dev) < 0 && !retval) + return; + } cmos_do_shutdown(cmos->irq); } @@ -1243,8 +1238,6 @@ static int __init cmos_init(void) platform_driver_registered = true; } - dmi_check_system(rtc_quirks); - if (retval == 0) return 0; diff --git a/drivers/rtc/rtc-coh901331.c b/drivers/rtc/rtc-coh901331.c index 56343b2fbc68..101b7a240e0f 100644 --- a/drivers/rtc/rtc-coh901331.c +++ b/drivers/rtc/rtc-coh901331.c @@ -263,6 +263,7 @@ static const struct of_device_id coh901331_dt_match[] = { { .compatible = "stericsson,coh901331" }, {}, }; +MODULE_DEVICE_TABLE(of, coh901331_dt_match); static struct platform_driver coh901331_driver = { .driver = { diff --git a/drivers/rtc/rtc-core.h b/drivers/rtc/rtc-core.h index 5f9df7430a22..a098aea197fc 100644 --- a/drivers/rtc/rtc-core.h +++ b/drivers/rtc/rtc-core.h @@ -48,23 +48,10 @@ static inline void rtc_proc_del_device(struct rtc_device *rtc) #endif #ifdef CONFIG_RTC_INTF_SYSFS - -extern void __init rtc_sysfs_init(struct class *); -extern void rtc_sysfs_add_device(struct rtc_device *rtc); -extern void rtc_sysfs_del_device(struct rtc_device *rtc); - +const struct attribute_group **rtc_get_dev_attribute_groups(void); #else - -static inline void rtc_sysfs_init(struct class *rtc) -{ -} - -static inline void rtc_sysfs_add_device(struct rtc_device *rtc) +static inline const struct attribute_group **rtc_get_dev_attribute_groups(void) { + return NULL; } - -static inline void rtc_sysfs_del_device(struct rtc_device *rtc) -{ -} - #endif diff --git a/drivers/rtc/rtc-da9063.c b/drivers/rtc/rtc-da9063.c index 7ffc5707f8b9..00a8f7f4f87c 100644 --- a/drivers/rtc/rtc-da9063.c +++ b/drivers/rtc/rtc-da9063.c @@ -12,15 +12,18 @@ * Library General Public License for more details. */ +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> -#include <linux/init.h> +#include <linux/of.h> #include <linux/platform_device.h> -#include <linux/interrupt.h> +#include <linux/regmap.h> #include <linux/rtc.h> #include <linux/slab.h> -#include <linux/delay.h> -#include <linux/regmap.h> + +#include <linux/mfd/da9062/registers.h> #include <linux/mfd/da9063/registers.h> #include <linux/mfd/da9063/core.h> @@ -29,99 +32,231 @@ #define YEARS_FROM_DA9063(year) ((year) + 100) #define MONTHS_FROM_DA9063(month) ((month) - 1) -#define RTC_ALARM_DATA_LEN (DA9063_AD_REG_ALARM_Y - DA9063_AD_REG_ALARM_MI + 1) - -#define RTC_DATA_LEN (DA9063_REG_COUNT_Y - DA9063_REG_COUNT_S + 1) -#define RTC_SEC 0 -#define RTC_MIN 1 -#define RTC_HOUR 2 -#define RTC_DAY 3 -#define RTC_MONTH 4 -#define RTC_YEAR 5 - -struct da9063_rtc { - struct rtc_device *rtc_dev; - struct da9063 *hw; - struct rtc_time alarm_time; - bool rtc_sync; - int alarm_year; - int alarm_start; - int alarm_len; - int data_start; +enum { + RTC_SEC = 0, + RTC_MIN = 1, + RTC_HOUR = 2, + RTC_DAY = 3, + RTC_MONTH = 4, + RTC_YEAR = 5, + RTC_DATA_LEN +}; + +struct da9063_compatible_rtc_regmap { + /* REGS */ + int rtc_enable_reg; + int rtc_enable_32k_crystal_reg; + int rtc_alarm_secs_reg; + int rtc_alarm_year_reg; + int rtc_count_secs_reg; + int rtc_count_year_reg; + int rtc_event_reg; + /* MASKS */ + int rtc_enable_mask; + int rtc_crystal_mask; + int rtc_event_alarm_mask; + int rtc_alarm_on_mask; + int rtc_alarm_status_mask; + int rtc_tick_on_mask; + int rtc_ready_to_read_mask; + int rtc_count_sec_mask; + int rtc_count_min_mask; + int rtc_count_hour_mask; + int rtc_count_day_mask; + int rtc_count_month_mask; + int rtc_count_year_mask; + /* ALARM CONFIG */ + int rtc_data_start; + int rtc_alarm_len; +}; + +struct da9063_compatible_rtc { + struct rtc_device *rtc_dev; + struct rtc_time alarm_time; + struct regmap *regmap; + const struct da9063_compatible_rtc_regmap *config; + bool rtc_sync; +}; + +static const struct da9063_compatible_rtc_regmap da9063_ad_regs = { + /* REGS */ + .rtc_enable_reg = DA9063_REG_CONTROL_E, + .rtc_alarm_secs_reg = DA9063_AD_REG_ALARM_MI, + .rtc_alarm_year_reg = DA9063_AD_REG_ALARM_Y, + .rtc_count_secs_reg = DA9063_REG_COUNT_S, + .rtc_count_year_reg = DA9063_REG_COUNT_Y, + .rtc_event_reg = DA9063_REG_EVENT_A, + /* MASKS */ + .rtc_enable_mask = DA9063_RTC_EN, + .rtc_crystal_mask = DA9063_CRYSTAL, + .rtc_enable_32k_crystal_reg = DA9063_REG_EN_32K, + .rtc_event_alarm_mask = DA9063_E_ALARM, + .rtc_alarm_on_mask = DA9063_ALARM_ON, + .rtc_alarm_status_mask = DA9063_ALARM_STATUS_ALARM | + DA9063_ALARM_STATUS_TICK, + .rtc_tick_on_mask = DA9063_TICK_ON, + .rtc_ready_to_read_mask = DA9063_RTC_READ, + .rtc_count_sec_mask = DA9063_COUNT_SEC_MASK, + .rtc_count_min_mask = DA9063_COUNT_MIN_MASK, + .rtc_count_hour_mask = DA9063_COUNT_HOUR_MASK, + .rtc_count_day_mask = DA9063_COUNT_DAY_MASK, + .rtc_count_month_mask = DA9063_COUNT_MONTH_MASK, + .rtc_count_year_mask = DA9063_COUNT_YEAR_MASK, + /* ALARM CONFIG */ + .rtc_data_start = RTC_MIN, + .rtc_alarm_len = RTC_DATA_LEN - 1, +}; + +static const struct da9063_compatible_rtc_regmap da9063_bb_regs = { + /* REGS */ + .rtc_enable_reg = DA9063_REG_CONTROL_E, + .rtc_alarm_secs_reg = DA9063_BB_REG_ALARM_S, + .rtc_alarm_year_reg = DA9063_BB_REG_ALARM_Y, + .rtc_count_secs_reg = DA9063_REG_COUNT_S, + .rtc_count_year_reg = DA9063_REG_COUNT_Y, + .rtc_event_reg = DA9063_REG_EVENT_A, + /* MASKS */ + .rtc_enable_mask = DA9063_RTC_EN, + .rtc_crystal_mask = DA9063_CRYSTAL, + .rtc_enable_32k_crystal_reg = DA9063_REG_EN_32K, + .rtc_event_alarm_mask = DA9063_E_ALARM, + .rtc_alarm_on_mask = DA9063_ALARM_ON, + .rtc_alarm_status_mask = DA9063_ALARM_STATUS_ALARM | + DA9063_ALARM_STATUS_TICK, + .rtc_tick_on_mask = DA9063_TICK_ON, + .rtc_ready_to_read_mask = DA9063_RTC_READ, + .rtc_count_sec_mask = DA9063_COUNT_SEC_MASK, + .rtc_count_min_mask = DA9063_COUNT_MIN_MASK, + .rtc_count_hour_mask = DA9063_COUNT_HOUR_MASK, + .rtc_count_day_mask = DA9063_COUNT_DAY_MASK, + .rtc_count_month_mask = DA9063_COUNT_MONTH_MASK, + .rtc_count_year_mask = DA9063_COUNT_YEAR_MASK, + /* ALARM CONFIG */ + .rtc_data_start = RTC_SEC, + .rtc_alarm_len = RTC_DATA_LEN, +}; + +static const struct da9063_compatible_rtc_regmap da9062_aa_regs = { + /* REGS */ + .rtc_enable_reg = DA9062AA_CONTROL_E, + .rtc_alarm_secs_reg = DA9062AA_ALARM_S, + .rtc_alarm_year_reg = DA9062AA_ALARM_Y, + .rtc_count_secs_reg = DA9062AA_COUNT_S, + .rtc_count_year_reg = DA9062AA_COUNT_Y, + .rtc_event_reg = DA9062AA_EVENT_A, + /* MASKS */ + .rtc_enable_mask = DA9062AA_RTC_EN_MASK, + .rtc_crystal_mask = DA9062AA_CRYSTAL_MASK, + .rtc_enable_32k_crystal_reg = DA9062AA_EN_32K, + .rtc_event_alarm_mask = DA9062AA_M_ALARM_MASK, + .rtc_alarm_on_mask = DA9062AA_ALARM_ON_MASK, + .rtc_alarm_status_mask = (0x02 << 6), + .rtc_tick_on_mask = DA9062AA_TICK_ON_MASK, + .rtc_ready_to_read_mask = DA9062AA_RTC_READ_MASK, + .rtc_count_sec_mask = DA9062AA_COUNT_SEC_MASK, + .rtc_count_min_mask = DA9062AA_COUNT_MIN_MASK, + .rtc_count_hour_mask = DA9062AA_COUNT_HOUR_MASK, + .rtc_count_day_mask = DA9062AA_COUNT_DAY_MASK, + .rtc_count_month_mask = DA9062AA_COUNT_MONTH_MASK, + .rtc_count_year_mask = DA9062AA_COUNT_YEAR_MASK, + /* ALARM CONFIG */ + .rtc_data_start = RTC_SEC, + .rtc_alarm_len = RTC_DATA_LEN, +}; + +static const struct of_device_id da9063_compatible_reg_id_table[] = { + { .compatible = "dlg,da9063-rtc", .data = &da9063_bb_regs }, + { .compatible = "dlg,da9062-rtc", .data = &da9062_aa_regs }, + { }, }; +MODULE_DEVICE_TABLE(of, da9063_compatible_reg_id_table); -static void da9063_data_to_tm(u8 *data, struct rtc_time *tm) +static void da9063_data_to_tm(u8 *data, struct rtc_time *tm, + struct da9063_compatible_rtc *rtc) { - tm->tm_sec = data[RTC_SEC] & DA9063_COUNT_SEC_MASK; - tm->tm_min = data[RTC_MIN] & DA9063_COUNT_MIN_MASK; - tm->tm_hour = data[RTC_HOUR] & DA9063_COUNT_HOUR_MASK; - tm->tm_mday = data[RTC_DAY] & DA9063_COUNT_DAY_MASK; + const struct da9063_compatible_rtc_regmap *config = rtc->config; + + tm->tm_sec = data[RTC_SEC] & config->rtc_count_sec_mask; + tm->tm_min = data[RTC_MIN] & config->rtc_count_min_mask; + tm->tm_hour = data[RTC_HOUR] & config->rtc_count_hour_mask; + tm->tm_mday = data[RTC_DAY] & config->rtc_count_day_mask; tm->tm_mon = MONTHS_FROM_DA9063(data[RTC_MONTH] & - DA9063_COUNT_MONTH_MASK); + config->rtc_count_month_mask); tm->tm_year = YEARS_FROM_DA9063(data[RTC_YEAR] & - DA9063_COUNT_YEAR_MASK); + config->rtc_count_year_mask); } -static void da9063_tm_to_data(struct rtc_time *tm, u8 *data) +static void da9063_tm_to_data(struct rtc_time *tm, u8 *data, + struct da9063_compatible_rtc *rtc) { - data[RTC_SEC] &= ~DA9063_COUNT_SEC_MASK; - data[RTC_SEC] |= tm->tm_sec & DA9063_COUNT_SEC_MASK; + const struct da9063_compatible_rtc_regmap *config = rtc->config; + + data[RTC_SEC] &= ~config->rtc_count_sec_mask; + data[RTC_SEC] |= tm->tm_sec & config->rtc_count_sec_mask; - data[RTC_MIN] &= ~DA9063_COUNT_MIN_MASK; - data[RTC_MIN] |= tm->tm_min & DA9063_COUNT_MIN_MASK; + data[RTC_MIN] &= ~config->rtc_count_min_mask; + data[RTC_MIN] |= tm->tm_min & config->rtc_count_min_mask; - data[RTC_HOUR] &= ~DA9063_COUNT_HOUR_MASK; - data[RTC_HOUR] |= tm->tm_hour & DA9063_COUNT_HOUR_MASK; + data[RTC_HOUR] &= ~config->rtc_count_hour_mask; + data[RTC_HOUR] |= tm->tm_hour & config->rtc_count_hour_mask; - data[RTC_DAY] &= ~DA9063_COUNT_DAY_MASK; - data[RTC_DAY] |= tm->tm_mday & DA9063_COUNT_DAY_MASK; + data[RTC_DAY] &= ~config->rtc_count_day_mask; + data[RTC_DAY] |= tm->tm_mday & config->rtc_count_day_mask; - data[RTC_MONTH] &= ~DA9063_COUNT_MONTH_MASK; + data[RTC_MONTH] &= ~config->rtc_count_month_mask; data[RTC_MONTH] |= MONTHS_TO_DA9063(tm->tm_mon) & - DA9063_COUNT_MONTH_MASK; + config->rtc_count_month_mask; - data[RTC_YEAR] &= ~DA9063_COUNT_YEAR_MASK; + data[RTC_YEAR] &= ~config->rtc_count_year_mask; data[RTC_YEAR] |= YEARS_TO_DA9063(tm->tm_year) & - DA9063_COUNT_YEAR_MASK; + config->rtc_count_year_mask; } static int da9063_rtc_stop_alarm(struct device *dev) { - struct da9063_rtc *rtc = dev_get_drvdata(dev); + struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev); + const struct da9063_compatible_rtc_regmap *config = rtc->config; - return regmap_update_bits(rtc->hw->regmap, rtc->alarm_year, - DA9063_ALARM_ON, 0); + return regmap_update_bits(rtc->regmap, + config->rtc_alarm_year_reg, + config->rtc_alarm_on_mask, + 0); } static int da9063_rtc_start_alarm(struct device *dev) { - struct da9063_rtc *rtc = dev_get_drvdata(dev); + struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev); + const struct da9063_compatible_rtc_regmap *config = rtc->config; - return regmap_update_bits(rtc->hw->regmap, rtc->alarm_year, - DA9063_ALARM_ON, DA9063_ALARM_ON); + return regmap_update_bits(rtc->regmap, + config->rtc_alarm_year_reg, + config->rtc_alarm_on_mask, + config->rtc_alarm_on_mask); } static int da9063_rtc_read_time(struct device *dev, struct rtc_time *tm) { - struct da9063_rtc *rtc = dev_get_drvdata(dev); + struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev); + const struct da9063_compatible_rtc_regmap *config = rtc->config; unsigned long tm_secs; unsigned long al_secs; u8 data[RTC_DATA_LEN]; int ret; - ret = regmap_bulk_read(rtc->hw->regmap, DA9063_REG_COUNT_S, + ret = regmap_bulk_read(rtc->regmap, + config->rtc_count_secs_reg, data, RTC_DATA_LEN); if (ret < 0) { dev_err(dev, "Failed to read RTC time data: %d\n", ret); return ret; } - if (!(data[RTC_SEC] & DA9063_RTC_READ)) { + if (!(data[RTC_SEC] & config->rtc_ready_to_read_mask)) { dev_dbg(dev, "RTC not yet ready to be read by the host\n"); return -EINVAL; } - da9063_data_to_tm(data, tm); + da9063_data_to_tm(data, tm, rtc); rtc_tm_to_time(tm, &tm_secs); rtc_tm_to_time(&rtc->alarm_time, &al_secs); @@ -137,12 +272,14 @@ static int da9063_rtc_read_time(struct device *dev, struct rtc_time *tm) static int da9063_rtc_set_time(struct device *dev, struct rtc_time *tm) { - struct da9063_rtc *rtc = dev_get_drvdata(dev); + struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev); + const struct da9063_compatible_rtc_regmap *config = rtc->config; u8 data[RTC_DATA_LEN]; int ret; - da9063_tm_to_data(tm, data); - ret = regmap_bulk_write(rtc->hw->regmap, DA9063_REG_COUNT_S, + da9063_tm_to_data(tm, data, rtc); + ret = regmap_bulk_write(rtc->regmap, + config->rtc_count_secs_reg, data, RTC_DATA_LEN); if (ret < 0) dev_err(dev, "Failed to set RTC time data: %d\n", ret); @@ -152,26 +289,31 @@ static int da9063_rtc_set_time(struct device *dev, struct rtc_time *tm) static int da9063_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { - struct da9063_rtc *rtc = dev_get_drvdata(dev); + struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev); + const struct da9063_compatible_rtc_regmap *config = rtc->config; u8 data[RTC_DATA_LEN]; int ret; unsigned int val; data[RTC_SEC] = 0; - ret = regmap_bulk_read(rtc->hw->regmap, rtc->alarm_start, - &data[rtc->data_start], rtc->alarm_len); + ret = regmap_bulk_read(rtc->regmap, + config->rtc_alarm_secs_reg, + &data[config->rtc_data_start], + config->rtc_alarm_len); if (ret < 0) return ret; - da9063_data_to_tm(data, &alrm->time); + da9063_data_to_tm(data, &alrm->time, rtc); - alrm->enabled = !!(data[RTC_YEAR] & DA9063_ALARM_ON); + alrm->enabled = !!(data[RTC_YEAR] & config->rtc_alarm_on_mask); - ret = regmap_read(rtc->hw->regmap, DA9063_REG_EVENT_A, &val); + ret = regmap_read(rtc->regmap, + config->rtc_event_reg, + &val); if (ret < 0) return ret; - if (val & (DA9063_E_ALARM)) + if (val & config->rtc_event_alarm_mask) alrm->pending = 1; else alrm->pending = 0; @@ -181,11 +323,12 @@ static int da9063_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) static int da9063_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { - struct da9063_rtc *rtc = dev_get_drvdata(dev); + struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev); + const struct da9063_compatible_rtc_regmap *config = rtc->config; u8 data[RTC_DATA_LEN]; int ret; - da9063_tm_to_data(&alrm->time, data); + da9063_tm_to_data(&alrm->time, data, rtc); ret = da9063_rtc_stop_alarm(dev); if (ret < 0) { @@ -193,14 +336,16 @@ static int da9063_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) return ret; } - ret = regmap_bulk_write(rtc->hw->regmap, rtc->alarm_start, - &data[rtc->data_start], rtc->alarm_len); + ret = regmap_bulk_write(rtc->regmap, + config->rtc_alarm_secs_reg, + &data[config->rtc_data_start], + config->rtc_alarm_len); if (ret < 0) { dev_err(dev, "Failed to write alarm: %d\n", ret); return ret; } - da9063_data_to_tm(data, &rtc->alarm_time); + da9063_data_to_tm(data, &rtc->alarm_time, rtc); if (alrm->enabled) { ret = da9063_rtc_start_alarm(dev); @@ -213,7 +358,8 @@ static int da9063_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) return ret; } -static int da9063_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +static int da9063_rtc_alarm_irq_enable(struct device *dev, + unsigned int enabled) { if (enabled) return da9063_rtc_start_alarm(dev); @@ -223,10 +369,13 @@ static int da9063_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) static irqreturn_t da9063_alarm_event(int irq, void *data) { - struct da9063_rtc *rtc = data; + struct da9063_compatible_rtc *rtc = data; + const struct da9063_compatible_rtc_regmap *config = rtc->config; - regmap_update_bits(rtc->hw->regmap, rtc->alarm_year, - DA9063_ALARM_ON, 0); + regmap_update_bits(rtc->regmap, + config->rtc_alarm_year_reg, + config->rtc_alarm_on_mask, + 0); rtc->rtc_sync = true; rtc_update_irq(rtc->rtc_dev, 1, RTC_IRQF | RTC_AF); @@ -244,72 +393,92 @@ static const struct rtc_class_ops da9063_rtc_ops = { static int da9063_rtc_probe(struct platform_device *pdev) { - struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent); - struct da9063_rtc *rtc; + struct da9063_compatible_rtc *rtc; + const struct da9063_compatible_rtc_regmap *config; + const struct of_device_id *match; int irq_alarm; u8 data[RTC_DATA_LEN]; int ret; - ret = regmap_update_bits(da9063->regmap, DA9063_REG_CONTROL_E, - DA9063_RTC_EN, DA9063_RTC_EN); - if (ret < 0) { - dev_err(&pdev->dev, "Failed to enable RTC\n"); - goto err; - } + if (!pdev->dev.of_node) + return -ENXIO; - ret = regmap_update_bits(da9063->regmap, DA9063_REG_EN_32K, - DA9063_CRYSTAL, DA9063_CRYSTAL); - if (ret < 0) { - dev_err(&pdev->dev, "Failed to run 32kHz oscillator\n"); - goto err; - } + match = of_match_node(da9063_compatible_reg_id_table, + pdev->dev.of_node); rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); if (!rtc) return -ENOMEM; - if (da9063->variant_code == PMIC_DA9063_AD) { - rtc->alarm_year = DA9063_AD_REG_ALARM_Y; - rtc->alarm_start = DA9063_AD_REG_ALARM_MI; - rtc->alarm_len = RTC_ALARM_DATA_LEN; - rtc->data_start = RTC_MIN; - } else { - rtc->alarm_year = DA9063_BB_REG_ALARM_Y; - rtc->alarm_start = DA9063_BB_REG_ALARM_S; - rtc->alarm_len = RTC_DATA_LEN; - rtc->data_start = RTC_SEC; + rtc->config = match->data; + if (of_device_is_compatible(pdev->dev.of_node, "dlg,da9063-rtc")) { + struct da9063 *chip = dev_get_drvdata(pdev->dev.parent); + + if (chip->variant_code == PMIC_DA9063_AD) + rtc->config = &da9063_ad_regs; } - ret = regmap_update_bits(da9063->regmap, rtc->alarm_start, - DA9063_ALARM_STATUS_TICK | DA9063_ALARM_STATUS_ALARM, - 0); + rtc->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!rtc->regmap) { + dev_warn(&pdev->dev, "Parent regmap unavailable.\n"); + return -ENXIO; + } + + config = rtc->config; + ret = regmap_update_bits(rtc->regmap, + config->rtc_enable_reg, + config->rtc_enable_mask, + config->rtc_enable_mask); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to enable RTC\n"); + return ret; + } + + ret = regmap_update_bits(rtc->regmap, + config->rtc_enable_32k_crystal_reg, + config->rtc_crystal_mask, + config->rtc_crystal_mask); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to run 32kHz oscillator\n"); + return ret; + } + + ret = regmap_update_bits(rtc->regmap, + config->rtc_alarm_secs_reg, + config->rtc_alarm_status_mask, + 0); if (ret < 0) { dev_err(&pdev->dev, "Failed to access RTC alarm register\n"); - goto err; + return ret; } - ret = regmap_update_bits(da9063->regmap, rtc->alarm_start, + ret = regmap_update_bits(rtc->regmap, + config->rtc_alarm_secs_reg, DA9063_ALARM_STATUS_ALARM, DA9063_ALARM_STATUS_ALARM); if (ret < 0) { dev_err(&pdev->dev, "Failed to access RTC alarm register\n"); - goto err; + return ret; } - ret = regmap_update_bits(da9063->regmap, rtc->alarm_year, - DA9063_TICK_ON, 0); + ret = regmap_update_bits(rtc->regmap, + config->rtc_alarm_year_reg, + config->rtc_tick_on_mask, + 0); if (ret < 0) { dev_err(&pdev->dev, "Failed to disable TICKs\n"); - goto err; + return ret; } data[RTC_SEC] = 0; - ret = regmap_bulk_read(da9063->regmap, rtc->alarm_start, - &data[rtc->data_start], rtc->alarm_len); + ret = regmap_bulk_read(rtc->regmap, + config->rtc_alarm_secs_reg, + &data[config->rtc_data_start], + config->rtc_alarm_len); if (ret < 0) { dev_err(&pdev->dev, "Failed to read initial alarm data: %d\n", ret); - goto err; + return ret; } platform_set_drvdata(pdev, rtc); @@ -322,18 +491,16 @@ static int da9063_rtc_probe(struct platform_device *pdev) if (ret) { dev_err(&pdev->dev, "Failed to request ALARM IRQ %d: %d\n", irq_alarm, ret); - goto err; + return ret; } - rtc->hw = da9063; rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, DA9063_DRVNAME_RTC, &da9063_rtc_ops, THIS_MODULE); if (IS_ERR(rtc->rtc_dev)) return PTR_ERR(rtc->rtc_dev); - da9063_data_to_tm(data, &rtc->alarm_time); + da9063_data_to_tm(data, &rtc->alarm_time, rtc); rtc->rtc_sync = false; -err: return ret; } @@ -341,6 +508,7 @@ static struct platform_driver da9063_rtc_driver = { .probe = da9063_rtc_probe, .driver = { .name = DA9063_DRVNAME_RTC, + .of_match_table = da9063_compatible_reg_id_table, }, }; diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c index 799c34bcb26f..a6d9434addf6 100644 --- a/drivers/rtc/rtc-dev.c +++ b/drivers/rtc/rtc-dev.c @@ -477,6 +477,7 @@ void rtc_dev_prepare(struct rtc_device *rtc) cdev_init(&rtc->char_dev, &rtc_dev_fops); rtc->char_dev.owner = rtc->owner; + rtc->char_dev.kobj.parent = &rtc->dev.kobj; } void rtc_dev_add_device(struct rtc_device *rtc) diff --git a/drivers/rtc/rtc-ds1305.c b/drivers/rtc/rtc-ds1305.c index 12b07158a366..baa5d047f9c8 100644 --- a/drivers/rtc/rtc-ds1305.c +++ b/drivers/rtc/rtc-ds1305.c @@ -538,15 +538,6 @@ ds1305_nvram_read(struct file *filp, struct kobject *kobj, spi = container_of(kobj, struct spi_device, dev.kobj); - if (unlikely(off >= DS1305_NVRAM_LEN)) - return 0; - if (count >= DS1305_NVRAM_LEN) - count = DS1305_NVRAM_LEN; - if ((off + count) > DS1305_NVRAM_LEN) - count = DS1305_NVRAM_LEN - off; - if (unlikely(!count)) - return count; - addr = DS1305_NVRAM + off; msg_init(&m, x, &addr, count, NULL, buf); @@ -569,15 +560,6 @@ ds1305_nvram_write(struct file *filp, struct kobject *kobj, spi = container_of(kobj, struct spi_device, dev.kobj); - if (unlikely(off >= DS1305_NVRAM_LEN)) - return -EFBIG; - if (count >= DS1305_NVRAM_LEN) - count = DS1305_NVRAM_LEN; - if ((off + count) > DS1305_NVRAM_LEN) - count = DS1305_NVRAM_LEN - off; - if (unlikely(!count)) - return count; - addr = (DS1305_WRITE | DS1305_NVRAM) + off; msg_init(&m, x, &addr, count, buf, NULL); diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index 6e76de1856fc..a705e6490808 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -11,14 +11,17 @@ * published by the Free Software Foundation. */ -#include <linux/module.h> +#include <linux/bcd.h> +#include <linux/i2c.h> #include <linux/init.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/of_irq.h> +#include <linux/pm_wakeirq.h> +#include <linux/rtc/ds1307.h> +#include <linux/rtc.h> #include <linux/slab.h> -#include <linux/i2c.h> #include <linux/string.h> -#include <linux/rtc.h> -#include <linux/bcd.h> -#include <linux/rtc/ds1307.h> /* * We can't determine type by probing, but if we expect pre-Linux code @@ -114,7 +117,7 @@ struct ds1307 { #define HAS_ALARM 1 /* bit 1 == irq claimed */ struct i2c_client *client; struct rtc_device *rtc; - struct work_struct work; + int wakeirq; s32 (*read_block_data)(const struct i2c_client *client, u8 command, u8 length, u8 *values); s32 (*write_block_data)(const struct i2c_client *client, u8 command, @@ -311,27 +314,17 @@ static s32 ds1307_native_smbus_read_block_data(const struct i2c_client *client, /*----------------------------------------------------------------------*/ /* - * The IRQ logic includes a "real" handler running in IRQ context just - * long enough to schedule this workqueue entry. We need a task context - * to talk to the RTC, since I2C I/O calls require that; and disable the - * IRQ until we clear its status on the chip, so that this handler can - * work with any type of triggering (not just falling edge). - * * The ds1337 and ds1339 both have two alarms, but we only use the first * one (with a "seconds" field). For ds1337 we expect nINTA is our alarm * signal; ds1339 chips have only one alarm signal. */ -static void ds1307_work(struct work_struct *work) +static irqreturn_t ds1307_irq(int irq, void *dev_id) { - struct ds1307 *ds1307; - struct i2c_client *client; - struct mutex *lock; + struct i2c_client *client = dev_id; + struct ds1307 *ds1307 = i2c_get_clientdata(client); + struct mutex *lock = &ds1307->rtc->ops_lock; int stat, control; - ds1307 = container_of(work, struct ds1307, work); - client = ds1307->client; - lock = &ds1307->rtc->ops_lock; - mutex_lock(lock); stat = i2c_smbus_read_byte_data(client, DS1337_REG_STATUS); if (stat < 0) @@ -352,18 +345,8 @@ static void ds1307_work(struct work_struct *work) } out: - if (test_bit(HAS_ALARM, &ds1307->flags)) - enable_irq(client->irq); mutex_unlock(lock); -} -static irqreturn_t ds1307_irq(int irq, void *dev_id) -{ - struct i2c_client *client = dev_id; - struct ds1307 *ds1307 = i2c_get_clientdata(client); - - disable_irq_nosync(irq); - schedule_work(&ds1307->work); return IRQ_HANDLED; } @@ -634,13 +617,14 @@ static const struct rtc_class_ops ds13xx_rtc_ops = { MCP794XX_BIT_ALMX_C1 | \ MCP794XX_BIT_ALMX_C2) -static void mcp794xx_work(struct work_struct *work) +static irqreturn_t mcp794xx_irq(int irq, void *dev_id) { - struct ds1307 *ds1307 = container_of(work, struct ds1307, work); - struct i2c_client *client = ds1307->client; + struct i2c_client *client = dev_id; + struct ds1307 *ds1307 = i2c_get_clientdata(client); + struct mutex *lock = &ds1307->rtc->ops_lock; int reg, ret; - mutex_lock(&ds1307->rtc->ops_lock); + mutex_lock(lock); /* Check and clear alarm 0 interrupt flag. */ reg = i2c_smbus_read_byte_data(client, MCP794XX_REG_ALARM0_CTRL); @@ -665,9 +649,9 @@ static void mcp794xx_work(struct work_struct *work) rtc_update_irq(ds1307->rtc, 1, RTC_AF | RTC_IRQF); out: - if (test_bit(HAS_ALARM, &ds1307->flags)) - enable_irq(client->irq); - mutex_unlock(&ds1307->rtc->ops_lock); + mutex_unlock(lock); + + return IRQ_HANDLED; } static int mcp794xx_read_alarm(struct device *dev, struct rtc_wkalrm *t) @@ -798,13 +782,6 @@ ds1307_nvram_read(struct file *filp, struct kobject *kobj, client = kobj_to_i2c_client(kobj); ds1307 = i2c_get_clientdata(client); - if (unlikely(off >= ds1307->nvram->size)) - return 0; - if ((off + count) > ds1307->nvram->size) - count = ds1307->nvram->size - off; - if (unlikely(!count)) - return count; - result = ds1307->read_block_data(client, ds1307->nvram_offset + off, count, buf); if (result < 0) @@ -824,13 +801,6 @@ ds1307_nvram_write(struct file *filp, struct kobject *kobj, client = kobj_to_i2c_client(kobj); ds1307 = i2c_get_clientdata(client); - if (unlikely(off >= ds1307->nvram->size)) - return -EFBIG; - if ((off + count) > ds1307->nvram->size) - count = ds1307->nvram->size - off; - if (unlikely(!count)) - return count; - result = ds1307->write_block_data(client, ds1307->nvram_offset + off, count, buf); if (result < 0) { @@ -896,6 +866,8 @@ static int ds1307_probe(struct i2c_client *client, bool want_irq = false; unsigned char *buf; struct ds1307_platform_data *pdata = dev_get_platdata(&client->dev); + irq_handler_t irq_handler = ds1307_irq; + static const int bbsqi_bitpos[] = { [ds_1337] = 0, [ds_1339] = DS1339_BIT_BBSQI, @@ -962,8 +934,6 @@ static int ds1307_probe(struct i2c_client *client, * running on Vbackup (BBSQI/BBSQW) */ if (ds1307->client->irq > 0 && chip->alarm) { - INIT_WORK(&ds1307->work, ds1307_work); - ds1307->regs[0] |= DS1337_BIT_INTCN | bbsqi_bitpos[ds1307->type]; ds1307->regs[0] &= ~(DS1337_BIT_A2IE | DS1337_BIT_A1IE); @@ -1053,7 +1023,7 @@ static int ds1307_probe(struct i2c_client *client, case mcp794xx: rtc_ops = &mcp794xx_rtc_ops; if (ds1307->client->irq > 0 && chip->alarm) { - INIT_WORK(&ds1307->work, mcp794xx_work); + irq_handler = mcp794xx_irq; want_irq = true; } break; @@ -1176,18 +1146,43 @@ read_rtc: } if (want_irq) { - err = request_irq(client->irq, ds1307_irq, IRQF_SHARED, - ds1307->rtc->name, client); + struct device_node *node = client->dev.of_node; + + err = devm_request_threaded_irq(&client->dev, + client->irq, NULL, irq_handler, + IRQF_SHARED | IRQF_ONESHOT, + ds1307->rtc->name, client); if (err) { client->irq = 0; dev_err(&client->dev, "unable to request IRQ!\n"); - } else { + goto no_irq; + } + + set_bit(HAS_ALARM, &ds1307->flags); + dev_dbg(&client->dev, "got IRQ %d\n", client->irq); + + /* Currently supported by OF code only! */ + if (!node) + goto no_irq; + + err = of_irq_get(node, 1); + if (err <= 0) { + if (err == -EPROBE_DEFER) + goto exit; + goto no_irq; + } + ds1307->wakeirq = err; - set_bit(HAS_ALARM, &ds1307->flags); - dev_dbg(&client->dev, "got IRQ %d\n", client->irq); + err = dev_pm_set_dedicated_wake_irq(&client->dev, + ds1307->wakeirq); + if (err) { + dev_err(&client->dev, "unable to setup wakeIRQ %d!\n", + err); + goto exit; } } +no_irq: if (chip->nvram_size) { ds1307->nvram = devm_kzalloc(&client->dev, @@ -1231,10 +1226,8 @@ static int ds1307_remove(struct i2c_client *client) { struct ds1307 *ds1307 = i2c_get_clientdata(client); - if (test_and_clear_bit(HAS_ALARM, &ds1307->flags)) { - free_irq(client->irq, client); - cancel_work_sync(&ds1307->work); - } + if (ds1307->wakeirq) + dev_pm_clear_wake_irq(&client->dev); if (test_and_clear_bit(HAS_NVRAM, &ds1307->flags)) sysfs_remove_bin_file(&client->dev.kobj, ds1307->nvram); @@ -1245,7 +1238,6 @@ static int ds1307_remove(struct i2c_client *client) static struct i2c_driver ds1307_driver = { .driver = { .name = "rtc-ds1307", - .owner = THIS_MODULE, }, .probe = ds1307_probe, .remove = ds1307_remove, diff --git a/drivers/rtc/rtc-ds1343.c b/drivers/rtc/rtc-ds1343.c index ae9f997223b1..79a06dd3c185 100644 --- a/drivers/rtc/rtc-ds1343.c +++ b/drivers/rtc/rtc-ds1343.c @@ -162,12 +162,6 @@ static ssize_t ds1343_nvram_write(struct file *filp, struct kobject *kobj, struct device *dev = kobj_to_dev(kobj); struct ds1343_priv *priv = dev_get_drvdata(dev); - if (unlikely(!count)) - return count; - - if ((count + off) > DS1343_NVRAM_LEN) - count = DS1343_NVRAM_LEN - off; - address = DS1343_NVRAM + off; ret = regmap_bulk_write(priv->map, address, buf, count); @@ -187,12 +181,6 @@ static ssize_t ds1343_nvram_read(struct file *filp, struct kobject *kobj, struct device *dev = kobj_to_dev(kobj); struct ds1343_priv *priv = dev_get_drvdata(dev); - if (unlikely(!count)) - return count; - - if ((count + off) > DS1343_NVRAM_LEN) - count = DS1343_NVRAM_LEN - off; - address = DS1343_NVRAM + off; ret = regmap_bulk_read(priv->map, address, buf, count); diff --git a/drivers/rtc/rtc-ds1374.c b/drivers/rtc/rtc-ds1374.c index 167783fa7ac1..3b3049c8c9e0 100644 --- a/drivers/rtc/rtc-ds1374.c +++ b/drivers/rtc/rtc-ds1374.c @@ -664,11 +664,8 @@ static int ds1374_remove(struct i2c_client *client) { struct ds1374 *ds1374 = i2c_get_clientdata(client); #ifdef CONFIG_RTC_DRV_DS1374_WDT - int res; - - res = misc_deregister(&ds1374_miscdev); - if (!res) - ds1374_miscdev.parent = NULL; + misc_deregister(&ds1374_miscdev); + ds1374_miscdev.parent = NULL; unregister_reboot_notifier(&ds1374_wdt_notifier); #endif @@ -689,7 +686,7 @@ static int ds1374_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); - if (client->irq >= 0 && device_may_wakeup(&client->dev)) + if (client->irq > 0 && device_may_wakeup(&client->dev)) enable_irq_wake(client->irq); return 0; } @@ -698,7 +695,7 @@ static int ds1374_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); - if (client->irq >= 0 && device_may_wakeup(&client->dev)) + if (client->irq > 0 && device_may_wakeup(&client->dev)) disable_irq_wake(client->irq); return 0; } @@ -709,7 +706,6 @@ static SIMPLE_DEV_PM_OPS(ds1374_pm, ds1374_suspend, ds1374_resume); static struct i2c_driver ds1374_driver = { .driver = { .name = "rtc-ds1374", - .owner = THIS_MODULE, .pm = &ds1374_pm, }, .probe = ds1374_probe, diff --git a/drivers/rtc/rtc-ds1511.c b/drivers/rtc/rtc-ds1511.c index 7415c2b4d6e8..da3d04ce83bd 100644 --- a/drivers/rtc/rtc-ds1511.c +++ b/drivers/rtc/rtc-ds1511.c @@ -64,7 +64,7 @@ enum ds1511reg { #define DS1511_KIE 0x04 #define DS1511_WDE 0x02 #define DS1511_WDS 0x01 -#define DS1511_RAM_MAX 0xff +#define DS1511_RAM_MAX 0x100 #define RTC_CMD DS1511_CONTROL_B #define RTC_CMD1 DS1511_CONTROL_A @@ -159,7 +159,7 @@ ds1511_wdog_set(unsigned long deciseconds) /* * set wdog enable and wdog 'steering' bit to issue a reset */ - rtc_write(DS1511_WDE | DS1511_WDS, RTC_CMD); + rtc_write(rtc_read(RTC_CMD) | DS1511_WDE | DS1511_WDS, RTC_CMD); } void @@ -407,26 +407,10 @@ ds1511_nvram_read(struct file *filp, struct kobject *kobj, { ssize_t count; - /* - * if count is more than one, turn on "burst" mode - * turn it off when you're done - */ - if (size > 1) - rtc_write((rtc_read(RTC_CMD) | DS1511_BME), RTC_CMD); - - if (pos > DS1511_RAM_MAX) - pos = DS1511_RAM_MAX; - - if (size + pos > DS1511_RAM_MAX + 1) - size = DS1511_RAM_MAX - pos + 1; - rtc_write(pos, DS1511_RAMADDR_LSB); - for (count = 0; size > 0; count++, size--) + for (count = 0; count < size; count++) *buf++ = rtc_read(DS1511_RAMDATA); - if (count > 1) - rtc_write((rtc_read(RTC_CMD) & ~DS1511_BME), RTC_CMD); - return count; } @@ -437,26 +421,10 @@ ds1511_nvram_write(struct file *filp, struct kobject *kobj, { ssize_t count; - /* - * if count is more than one, turn on "burst" mode - * turn it off when you're done - */ - if (size > 1) - rtc_write((rtc_read(RTC_CMD) | DS1511_BME), RTC_CMD); - - if (pos > DS1511_RAM_MAX) - pos = DS1511_RAM_MAX; - - if (size + pos > DS1511_RAM_MAX + 1) - size = DS1511_RAM_MAX - pos + 1; - rtc_write(pos, DS1511_RAMADDR_LSB); - for (count = 0; size > 0; count++, size--) + for (count = 0; count < size; count++) rtc_write(*buf++, DS1511_RAMDATA); - if (count > 1) - rtc_write((rtc_read(RTC_CMD) & ~DS1511_BME), RTC_CMD); - return count; } @@ -490,7 +458,7 @@ static int ds1511_rtc_probe(struct platform_device *pdev) /* * turn on the clock and the crystal, etc. */ - rtc_write(0, RTC_CMD); + rtc_write(DS1511_BME, RTC_CMD); rtc_write(0, RTC_CMD1); /* * clear the wdog counter diff --git a/drivers/rtc/rtc-ds1553.c b/drivers/rtc/rtc-ds1553.c index a24e091bcb41..38422ab4ec5a 100644 --- a/drivers/rtc/rtc-ds1553.c +++ b/drivers/rtc/rtc-ds1553.c @@ -245,7 +245,7 @@ static ssize_t ds1553_nvram_read(struct file *filp, struct kobject *kobj, void __iomem *ioaddr = pdata->ioaddr; ssize_t count; - for (count = 0; size > 0 && pos < RTC_OFFSET; count++, size--) + for (count = 0; count < size; count++) *buf++ = readb(ioaddr + pos++); return count; } @@ -260,7 +260,7 @@ static ssize_t ds1553_nvram_write(struct file *filp, struct kobject *kobj, void __iomem *ioaddr = pdata->ioaddr; ssize_t count; - for (count = 0; size > 0 && pos < RTC_OFFSET; count++, size--) + for (count = 0; count < size; count++) writeb(*buf++, ioaddr + pos++); return count; } diff --git a/drivers/rtc/rtc-ds1685.c b/drivers/rtc/rtc-ds1685.c index 818a3635a8c8..05a51ef52703 100644 --- a/drivers/rtc/rtc-ds1685.c +++ b/drivers/rtc/rtc-ds1685.c @@ -2145,27 +2145,7 @@ static struct platform_driver ds1685_rtc_driver = { .probe = ds1685_rtc_probe, .remove = ds1685_rtc_remove, }; - -/** - * ds1685_rtc_init - rtc module init. - */ -static int __init -ds1685_rtc_init(void) -{ - return platform_driver_register(&ds1685_rtc_driver); -} - -/** - * ds1685_rtc_exit - rtc module exit. - */ -static void __exit -ds1685_rtc_exit(void) -{ - platform_driver_unregister(&ds1685_rtc_driver); -} - -module_init(ds1685_rtc_init); -module_exit(ds1685_rtc_exit); +module_platform_driver(ds1685_rtc_driver); /* ----------------------------------------------------------------------- */ diff --git a/drivers/rtc/rtc-ds1742.c b/drivers/rtc/rtc-ds1742.c index 0f8d8ace1515..c5168b3bcf1a 100644 --- a/drivers/rtc/rtc-ds1742.c +++ b/drivers/rtc/rtc-ds1742.c @@ -134,7 +134,7 @@ static ssize_t ds1742_nvram_read(struct file *filp, struct kobject *kobj, void __iomem *ioaddr = pdata->ioaddr_nvram; ssize_t count; - for (count = 0; size > 0 && pos < pdata->size_nvram; count++, size--) + for (count = 0; count < size; count++) *buf++ = readb(ioaddr + pos++); return count; } @@ -149,7 +149,7 @@ static ssize_t ds1742_nvram_write(struct file *filp, struct kobject *kobj, void __iomem *ioaddr = pdata->ioaddr_nvram; ssize_t count; - for (count = 0; size > 0 && pos < pdata->size_nvram; count++, size--) + for (count = 0; count < size; count++) writeb(*buf++, ioaddr + pos++); return count; } diff --git a/drivers/rtc/rtc-ds3232.c b/drivers/rtc/rtc-ds3232.c index 7e48e532214f..4e99ace66f74 100644 --- a/drivers/rtc/rtc-ds3232.c +++ b/drivers/rtc/rtc-ds3232.c @@ -443,7 +443,7 @@ static int ds3232_remove(struct i2c_client *client) { struct ds3232 *ds3232 = i2c_get_clientdata(client); - if (client->irq >= 0) { + if (client->irq > 0) { mutex_lock(&ds3232->mutex); ds3232->exiting = 1; mutex_unlock(&ds3232->mutex); @@ -463,7 +463,10 @@ static int ds3232_suspend(struct device *dev) if (device_can_wakeup(dev)) { ds3232->suspended = true; - irq_set_irq_wake(client->irq, 1); + if (irq_set_irq_wake(client->irq, 1)) { + dev_warn_once(dev, "Cannot set wakeup source\n"); + ds3232->suspended = false; + } } return 0; @@ -500,7 +503,6 @@ MODULE_DEVICE_TABLE(i2c, ds3232_id); static struct i2c_driver ds3232_driver = { .driver = { .name = "rtc-ds3232", - .owner = THIS_MODULE, .pm = &ds3232_pm_ops, }, .probe = ds3232_probe, diff --git a/drivers/rtc/rtc-fm3130.c b/drivers/rtc/rtc-fm3130.c index 83c3b3029fa7..576eadbba296 100644 --- a/drivers/rtc/rtc-fm3130.c +++ b/drivers/rtc/rtc-fm3130.c @@ -523,7 +523,6 @@ exit_free: static struct i2c_driver fm3130_driver = { .driver = { .name = "rtc-fm3130", - .owner = THIS_MODULE, }, .probe = fm3130_probe, .id_table = fm3130_id, diff --git a/drivers/rtc/rtc-gemini.c b/drivers/rtc/rtc-gemini.c index 35f4486738fc..e84184647d15 100644 --- a/drivers/rtc/rtc-gemini.c +++ b/drivers/rtc/rtc-gemini.c @@ -148,10 +148,7 @@ static int gemini_rtc_probe(struct platform_device *pdev) rtc->rtc_dev = rtc_device_register(pdev->name, dev, &gemini_rtc_ops, THIS_MODULE); - if (likely(IS_ERR(rtc->rtc_dev))) - return PTR_ERR(rtc->rtc_dev); - - return 0; + return PTR_ERR_OR_ZERO(rtc->rtc_dev); } static int gemini_rtc_remove(struct platform_device *pdev) diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c index e9da7959d3fe..097325d96db5 100644 --- a/drivers/rtc/rtc-hym8563.c +++ b/drivers/rtc/rtc-hym8563.c @@ -599,7 +599,6 @@ MODULE_DEVICE_TABLE(of, hym8563_dt_idtable); static struct i2c_driver hym8563_driver = { .driver = { .name = "rtc-hym8563", - .owner = THIS_MODULE, .pm = &hym8563_pm_ops, .of_match_table = hym8563_dt_idtable, }, diff --git a/drivers/rtc/rtc-isl12022.c b/drivers/rtc/rtc-isl12022.c index f9b082784b90..839d1fd63cd7 100644 --- a/drivers/rtc/rtc-isl12022.c +++ b/drivers/rtc/rtc-isl12022.c @@ -151,12 +151,7 @@ static int isl12022_get_datetime(struct i2c_client *client, struct rtc_time *tm) tm->tm_sec, tm->tm_min, tm->tm_hour, tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); - /* The clock can give out invalid datetime, but we cannot return - * -EINVAL otherwise hwclock will refuse to set the time on bootup. */ - if (rtc_valid_tm(tm) < 0) - dev_err(&client->dev, "retrieved date and time is invalid.\n"); - - return 0; + return rtc_valid_tm(tm); } static int isl12022_set_datetime(struct i2c_client *client, struct rtc_time *tm) @@ -279,6 +274,7 @@ static const struct of_device_id isl12022_dt_match[] = { { .compatible = "isil,isl12022" }, { }, }; +MODULE_DEVICE_TABLE(of, isl12022_dt_match); #endif static const struct i2c_device_id isl12022_id[] = { diff --git a/drivers/rtc/rtc-isl12057.c b/drivers/rtc/rtc-isl12057.c index da818d3337ce..a0462e5430c7 100644 --- a/drivers/rtc/rtc-isl12057.c +++ b/drivers/rtc/rtc-isl12057.c @@ -648,6 +648,7 @@ static const struct of_device_id isl12057_dt_match[] = { { .compatible = "isil,isl12057" }, { }, }; +MODULE_DEVICE_TABLE(of, isl12057_dt_match); #endif static const struct i2c_device_id isl12057_id[] = { @@ -659,7 +660,6 @@ MODULE_DEVICE_TABLE(i2c, isl12057_id); static struct i2c_driver isl12057_driver = { .driver = { .name = DRV_NAME, - .owner = THIS_MODULE, .pm = &isl12057_rtc_pm_ops, .of_match_table = of_match_ptr(isl12057_dt_match), }, diff --git a/drivers/rtc/rtc-lpc24xx.c b/drivers/rtc/rtc-lpc24xx.c new file mode 100644 index 000000000000..59d99596fdeb --- /dev/null +++ b/drivers/rtc/rtc-lpc24xx.c @@ -0,0 +1,310 @@ +/* + * RTC driver for NXP LPC178x/18xx/43xx Real-Time Clock (RTC) + * + * Copyright (C) 2011 NXP Semiconductors + * Copyright (C) 2015 Joachim Eastwood <[email protected]> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/rtc.h> + +/* LPC24xx RTC register offsets and bits */ +#define LPC24XX_ILR 0x00 +#define LPC24XX_RTCCIF BIT(0) +#define LPC24XX_RTCALF BIT(1) +#define LPC24XX_CTC 0x04 +#define LPC24XX_CCR 0x08 +#define LPC24XX_CLKEN BIT(0) +#define LPC178X_CCALEN BIT(4) +#define LPC24XX_CIIR 0x0c +#define LPC24XX_AMR 0x10 +#define LPC24XX_ALARM_DISABLE 0xff +#define LPC24XX_CTIME0 0x14 +#define LPC24XX_CTIME1 0x18 +#define LPC24XX_CTIME2 0x1c +#define LPC24XX_SEC 0x20 +#define LPC24XX_MIN 0x24 +#define LPC24XX_HOUR 0x28 +#define LPC24XX_DOM 0x2c +#define LPC24XX_DOW 0x30 +#define LPC24XX_DOY 0x34 +#define LPC24XX_MONTH 0x38 +#define LPC24XX_YEAR 0x3c +#define LPC24XX_ALSEC 0x60 +#define LPC24XX_ALMIN 0x64 +#define LPC24XX_ALHOUR 0x68 +#define LPC24XX_ALDOM 0x6c +#define LPC24XX_ALDOW 0x70 +#define LPC24XX_ALDOY 0x74 +#define LPC24XX_ALMON 0x78 +#define LPC24XX_ALYEAR 0x7c + +/* Macros to read fields in consolidated time (CT) registers */ +#define CT0_SECS(x) (((x) >> 0) & 0x3f) +#define CT0_MINS(x) (((x) >> 8) & 0x3f) +#define CT0_HOURS(x) (((x) >> 16) & 0x1f) +#define CT0_DOW(x) (((x) >> 24) & 0x07) +#define CT1_DOM(x) (((x) >> 0) & 0x1f) +#define CT1_MONTH(x) (((x) >> 8) & 0x0f) +#define CT1_YEAR(x) (((x) >> 16) & 0xfff) +#define CT2_DOY(x) (((x) >> 0) & 0xfff) + +#define rtc_readl(dev, reg) readl((dev)->rtc_base + (reg)) +#define rtc_writel(dev, reg, val) writel((val), (dev)->rtc_base + (reg)) + +struct lpc24xx_rtc { + void __iomem *rtc_base; + struct rtc_device *rtc; + struct clk *clk_rtc; + struct clk *clk_reg; +}; + +static int lpc24xx_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct lpc24xx_rtc *rtc = dev_get_drvdata(dev); + + /* Disable RTC during update */ + rtc_writel(rtc, LPC24XX_CCR, LPC178X_CCALEN); + + rtc_writel(rtc, LPC24XX_SEC, tm->tm_sec); + rtc_writel(rtc, LPC24XX_MIN, tm->tm_min); + rtc_writel(rtc, LPC24XX_HOUR, tm->tm_hour); + rtc_writel(rtc, LPC24XX_DOW, tm->tm_wday); + rtc_writel(rtc, LPC24XX_DOM, tm->tm_mday); + rtc_writel(rtc, LPC24XX_DOY, tm->tm_yday); + rtc_writel(rtc, LPC24XX_MONTH, tm->tm_mon); + rtc_writel(rtc, LPC24XX_YEAR, tm->tm_year); + + rtc_writel(rtc, LPC24XX_CCR, LPC24XX_CLKEN | LPC178X_CCALEN); + + return 0; +} + +static int lpc24xx_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct lpc24xx_rtc *rtc = dev_get_drvdata(dev); + u32 ct0, ct1, ct2; + + ct0 = rtc_readl(rtc, LPC24XX_CTIME0); + ct1 = rtc_readl(rtc, LPC24XX_CTIME1); + ct2 = rtc_readl(rtc, LPC24XX_CTIME2); + + tm->tm_sec = CT0_SECS(ct0); + tm->tm_min = CT0_MINS(ct0); + tm->tm_hour = CT0_HOURS(ct0); + tm->tm_wday = CT0_DOW(ct0); + tm->tm_mon = CT1_MONTH(ct1); + tm->tm_mday = CT1_DOM(ct1); + tm->tm_year = CT1_YEAR(ct1); + tm->tm_yday = CT2_DOY(ct2); + + return rtc_valid_tm(tm); +} + +static int lpc24xx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) +{ + struct lpc24xx_rtc *rtc = dev_get_drvdata(dev); + struct rtc_time *tm = &wkalrm->time; + + tm->tm_sec = rtc_readl(rtc, LPC24XX_ALSEC); + tm->tm_min = rtc_readl(rtc, LPC24XX_ALMIN); + tm->tm_hour = rtc_readl(rtc, LPC24XX_ALHOUR); + tm->tm_mday = rtc_readl(rtc, LPC24XX_ALDOM); + tm->tm_wday = rtc_readl(rtc, LPC24XX_ALDOW); + tm->tm_yday = rtc_readl(rtc, LPC24XX_ALDOY); + tm->tm_mon = rtc_readl(rtc, LPC24XX_ALMON); + tm->tm_year = rtc_readl(rtc, LPC24XX_ALYEAR); + + wkalrm->enabled = rtc_readl(rtc, LPC24XX_AMR) == 0; + wkalrm->pending = !!(rtc_readl(rtc, LPC24XX_ILR) & LPC24XX_RTCCIF); + + return rtc_valid_tm(&wkalrm->time); +} + +static int lpc24xx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) +{ + struct lpc24xx_rtc *rtc = dev_get_drvdata(dev); + struct rtc_time *tm = &wkalrm->time; + + /* Disable alarm irq during update */ + rtc_writel(rtc, LPC24XX_AMR, LPC24XX_ALARM_DISABLE); + + rtc_writel(rtc, LPC24XX_ALSEC, tm->tm_sec); + rtc_writel(rtc, LPC24XX_ALMIN, tm->tm_min); + rtc_writel(rtc, LPC24XX_ALHOUR, tm->tm_hour); + rtc_writel(rtc, LPC24XX_ALDOM, tm->tm_mday); + rtc_writel(rtc, LPC24XX_ALDOW, tm->tm_wday); + rtc_writel(rtc, LPC24XX_ALDOY, tm->tm_yday); + rtc_writel(rtc, LPC24XX_ALMON, tm->tm_mon); + rtc_writel(rtc, LPC24XX_ALYEAR, tm->tm_year); + + if (wkalrm->enabled) + rtc_writel(rtc, LPC24XX_AMR, 0); + + return 0; +} + +static int lpc24xx_rtc_alarm_irq_enable(struct device *dev, unsigned int enable) +{ + struct lpc24xx_rtc *rtc = dev_get_drvdata(dev); + + if (enable) + rtc_writel(rtc, LPC24XX_AMR, 0); + else + rtc_writel(rtc, LPC24XX_AMR, LPC24XX_ALARM_DISABLE); + + return 0; +} + +static irqreturn_t lpc24xx_rtc_interrupt(int irq, void *data) +{ + unsigned long events = RTC_IRQF; + struct lpc24xx_rtc *rtc = data; + u32 rtc_iir; + + /* Check interrupt cause */ + rtc_iir = rtc_readl(rtc, LPC24XX_ILR); + if (rtc_iir & LPC24XX_RTCALF) { + events |= RTC_AF; + rtc_writel(rtc, LPC24XX_AMR, LPC24XX_ALARM_DISABLE); + } + + /* Clear interrupt status and report event */ + rtc_writel(rtc, LPC24XX_ILR, rtc_iir); + rtc_update_irq(rtc->rtc, 1, events); + + return IRQ_HANDLED; +} + +static const struct rtc_class_ops lpc24xx_rtc_ops = { + .read_time = lpc24xx_rtc_read_time, + .set_time = lpc24xx_rtc_set_time, + .read_alarm = lpc24xx_rtc_read_alarm, + .set_alarm = lpc24xx_rtc_set_alarm, + .alarm_irq_enable = lpc24xx_rtc_alarm_irq_enable, +}; + +static int lpc24xx_rtc_probe(struct platform_device *pdev) +{ + struct lpc24xx_rtc *rtc; + struct resource *res; + int irq, ret; + + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + rtc->rtc_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(rtc->rtc_base)) + return PTR_ERR(rtc->rtc_base); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_warn(&pdev->dev, "can't get interrupt resource\n"); + return irq; + } + + rtc->clk_rtc = devm_clk_get(&pdev->dev, "rtc"); + if (IS_ERR(rtc->clk_rtc)) { + dev_err(&pdev->dev, "error getting rtc clock\n"); + return PTR_ERR(rtc->clk_rtc); + } + + rtc->clk_reg = devm_clk_get(&pdev->dev, "reg"); + if (IS_ERR(rtc->clk_reg)) { + dev_err(&pdev->dev, "error getting reg clock\n"); + return PTR_ERR(rtc->clk_reg); + } + + ret = clk_prepare_enable(rtc->clk_rtc); + if (ret) { + dev_err(&pdev->dev, "unable to enable rtc clock\n"); + return ret; + } + + ret = clk_prepare_enable(rtc->clk_reg); + if (ret) { + dev_err(&pdev->dev, "unable to enable reg clock\n"); + goto disable_rtc_clk; + } + + platform_set_drvdata(pdev, rtc); + + /* Clear any pending interrupts */ + rtc_writel(rtc, LPC24XX_ILR, LPC24XX_RTCCIF | LPC24XX_RTCALF); + + /* Enable RTC count */ + rtc_writel(rtc, LPC24XX_CCR, LPC24XX_CLKEN | LPC178X_CCALEN); + + ret = devm_request_irq(&pdev->dev, irq, lpc24xx_rtc_interrupt, 0, + pdev->name, rtc); + if (ret < 0) { + dev_warn(&pdev->dev, "can't request interrupt\n"); + goto disable_clks; + } + + rtc->rtc = devm_rtc_device_register(&pdev->dev, "lpc24xx-rtc", + &lpc24xx_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc->rtc)) { + dev_err(&pdev->dev, "can't register rtc device\n"); + ret = PTR_ERR(rtc->rtc); + goto disable_clks; + } + + return 0; + +disable_clks: + clk_disable_unprepare(rtc->clk_reg); +disable_rtc_clk: + clk_disable_unprepare(rtc->clk_rtc); + return ret; +} + +static int lpc24xx_rtc_remove(struct platform_device *pdev) +{ + struct lpc24xx_rtc *rtc = platform_get_drvdata(pdev); + + /* Ensure all interrupt sources are masked */ + rtc_writel(rtc, LPC24XX_AMR, LPC24XX_ALARM_DISABLE); + rtc_writel(rtc, LPC24XX_CIIR, 0); + + rtc_writel(rtc, LPC24XX_CCR, LPC178X_CCALEN); + + clk_disable_unprepare(rtc->clk_rtc); + clk_disable_unprepare(rtc->clk_reg); + + return 0; +} + +static const struct of_device_id lpc24xx_rtc_match[] = { + { .compatible = "nxp,lpc1788-rtc" }, + { } +}; +MODULE_DEVICE_TABLE(of, lpc24xx_rtc_match); + +static struct platform_driver lpc24xx_rtc_driver = { + .probe = lpc24xx_rtc_probe, + .remove = lpc24xx_rtc_remove, + .driver = { + .name = "lpc24xx-rtc", + .of_match_table = lpc24xx_rtc_match, + }, +}; +module_platform_driver(lpc24xx_rtc_driver); + +MODULE_AUTHOR("Kevin Wells <[email protected]>"); +MODULE_DESCRIPTION("RTC driver for the LPC178x/18xx/408x/43xx SoCs"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-m48t59.c b/drivers/rtc/rtc-m48t59.c index 90abb5bd589c..d99a705bec07 100644 --- a/drivers/rtc/rtc-m48t59.c +++ b/drivers/rtc/rtc-m48t59.c @@ -345,11 +345,12 @@ static ssize_t m48t59_nvram_read(struct file *filp, struct kobject *kobj, ssize_t cnt = 0; unsigned long flags; - for (; size > 0 && pos < pdata->offset; cnt++, size--) { - spin_lock_irqsave(&m48t59->lock, flags); + spin_lock_irqsave(&m48t59->lock, flags); + + for (; cnt < size; cnt++) *buf++ = M48T59_READ(cnt); - spin_unlock_irqrestore(&m48t59->lock, flags); - } + + spin_unlock_irqrestore(&m48t59->lock, flags); return cnt; } @@ -365,11 +366,12 @@ static ssize_t m48t59_nvram_write(struct file *filp, struct kobject *kobj, ssize_t cnt = 0; unsigned long flags; - for (; size > 0 && pos < pdata->offset; cnt++, size--) { - spin_lock_irqsave(&m48t59->lock, flags); + spin_lock_irqsave(&m48t59->lock, flags); + + for (; cnt < size; cnt++) M48T59_WRITE(*buf++, cnt); - spin_unlock_irqrestore(&m48t59->lock, flags); - } + + spin_unlock_irqrestore(&m48t59->lock, flags); return cnt; } diff --git a/drivers/rtc/rtc-max8997.c b/drivers/rtc/rtc-max8997.c index 9e02bcda0c09..db984d4bf952 100644 --- a/drivers/rtc/rtc-max8997.c +++ b/drivers/rtc/rtc-max8997.c @@ -521,6 +521,7 @@ static const struct platform_device_id rtc_id[] = { { "max8997-rtc", 0 }, {}, }; +MODULE_DEVICE_TABLE(platform, rtc_id); static struct platform_driver max8997_rtc_driver = { .driver = { diff --git a/drivers/rtc/rtc-moxart.c b/drivers/rtc/rtc-moxart.c index 73759c9a4527..07b30a373a92 100644 --- a/drivers/rtc/rtc-moxart.c +++ b/drivers/rtc/rtc-moxart.c @@ -312,6 +312,7 @@ static const struct of_device_id moxart_rtc_match[] = { { .compatible = "moxa,moxart-rtc" }, { }, }; +MODULE_DEVICE_TABLE(of, moxart_rtc_match); static struct platform_driver moxart_rtc_driver = { .probe = moxart_rtc_probe, diff --git a/drivers/rtc/rtc-mpc5121.c b/drivers/rtc/rtc-mpc5121.c index 1767e18d5bd4..4ca4daa0b8f3 100644 --- a/drivers/rtc/rtc-mpc5121.c +++ b/drivers/rtc/rtc-mpc5121.c @@ -406,6 +406,7 @@ static const struct of_device_id mpc5121_rtc_match[] = { { .compatible = "fsl,mpc5200-rtc", }, {}, }; +MODULE_DEVICE_TABLE(of, mpc5121_rtc_match); #endif static struct platform_driver mpc5121_rtc_driver = { diff --git a/drivers/rtc/rtc-mt6397.c b/drivers/rtc/rtc-mt6397.c index c0090b698ff3..06a5c52b292f 100644 --- a/drivers/rtc/rtc-mt6397.c +++ b/drivers/rtc/rtc-mt6397.c @@ -343,6 +343,8 @@ static int mtk_rtc_probe(struct platform_device *pdev) goto out_dispose_irq; } + device_init_wakeup(&pdev->dev, 1); + rtc->rtc_dev = rtc_device_register("mt6397-rtc", &pdev->dev, &mtk_rtc_ops, THIS_MODULE); if (IS_ERR(rtc->rtc_dev)) { @@ -351,8 +353,6 @@ static int mtk_rtc_probe(struct platform_device *pdev) goto out_free_irq; } - device_init_wakeup(&pdev->dev, 1); - return 0; out_free_irq: @@ -373,15 +373,42 @@ static int mtk_rtc_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int mt6397_rtc_suspend(struct device *dev) +{ + struct mt6397_rtc *rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(rtc->irq); + + return 0; +} + +static int mt6397_rtc_resume(struct device *dev) +{ + struct mt6397_rtc *rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(rtc->irq); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(mt6397_pm_ops, mt6397_rtc_suspend, + mt6397_rtc_resume); + static const struct of_device_id mt6397_rtc_of_match[] = { { .compatible = "mediatek,mt6397-rtc", }, { } }; +MODULE_DEVICE_TABLE(of, mt6397_rtc_of_match); static struct platform_driver mtk_rtc_driver = { .driver = { .name = "mt6397-rtc", .of_match_table = mt6397_rtc_of_match, + .pm = &mt6397_pm_ops, }, .probe = mtk_rtc_probe, .remove = mtk_rtc_remove, diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c index 7f50d2ef7f6e..79bb28617d45 100644 --- a/drivers/rtc/rtc-mv.c +++ b/drivers/rtc/rtc-mv.c @@ -324,6 +324,7 @@ static const struct of_device_id rtc_mv_of_match_table[] = { { .compatible = "marvell,orion-rtc", }, {} }; +MODULE_DEVICE_TABLE(of, rtc_mv_of_match_table); #endif static struct platform_driver mv_rtc_driver = { diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c index 5fc292c2dfdf..7bd89d90048f 100644 --- a/drivers/rtc/rtc-mxc.c +++ b/drivers/rtc/rtc-mxc.c @@ -16,6 +16,8 @@ #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/clk.h> +#include <linux/of.h> +#include <linux/of_device.h> #define RTC_INPUT_CLK_32768HZ (0x00 << 5) #define RTC_INPUT_CLK_32000HZ (0x01 << 5) @@ -79,7 +81,8 @@ struct rtc_plat_data { struct rtc_device *rtc; void __iomem *ioaddr; int irq; - struct clk *clk; + struct clk *clk_ref; + struct clk *clk_ipg; struct rtc_time g_rtc_alarm; enum imx_rtc_type devtype; }; @@ -97,6 +100,15 @@ static const struct platform_device_id imx_rtc_devtype[] = { }; MODULE_DEVICE_TABLE(platform, imx_rtc_devtype); +#ifdef CONFIG_OF +static const struct of_device_id imx_rtc_dt_ids[] = { + { .compatible = "fsl,imx1-rtc", .data = (const void *)IMX1_RTC }, + { .compatible = "fsl,imx21-rtc", .data = (const void *)IMX21_RTC }, + {} +}; +MODULE_DEVICE_TABLE(of, imx_rtc_dt_ids); +#endif + static inline int is_imx1_rtc(struct rtc_plat_data *data) { return data->devtype == IMX1_RTC; @@ -361,29 +373,45 @@ static int mxc_rtc_probe(struct platform_device *pdev) u32 reg; unsigned long rate; int ret; + const struct of_device_id *of_id; pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; - pdata->devtype = pdev->id_entry->driver_data; + of_id = of_match_device(imx_rtc_dt_ids, &pdev->dev); + if (of_id) + pdata->devtype = (enum imx_rtc_type)of_id->data; + else + pdata->devtype = pdev->id_entry->driver_data; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); pdata->ioaddr = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(pdata->ioaddr)) return PTR_ERR(pdata->ioaddr); - pdata->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(pdata->clk)) { - dev_err(&pdev->dev, "unable to get clock!\n"); - return PTR_ERR(pdata->clk); + pdata->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); + if (IS_ERR(pdata->clk_ipg)) { + dev_err(&pdev->dev, "unable to get ipg clock!\n"); + return PTR_ERR(pdata->clk_ipg); } - ret = clk_prepare_enable(pdata->clk); + ret = clk_prepare_enable(pdata->clk_ipg); if (ret) return ret; - rate = clk_get_rate(pdata->clk); + pdata->clk_ref = devm_clk_get(&pdev->dev, "ref"); + if (IS_ERR(pdata->clk_ref)) { + dev_err(&pdev->dev, "unable to get ref clock!\n"); + ret = PTR_ERR(pdata->clk_ref); + goto exit_put_clk_ipg; + } + + ret = clk_prepare_enable(pdata->clk_ref); + if (ret) + goto exit_put_clk_ipg; + + rate = clk_get_rate(pdata->clk_ref); if (rate == 32768) reg = RTC_INPUT_CLK_32768HZ; @@ -394,7 +422,7 @@ static int mxc_rtc_probe(struct platform_device *pdev) else { dev_err(&pdev->dev, "rtc clock is not valid (%lu)\n", rate); ret = -EINVAL; - goto exit_put_clk; + goto exit_put_clk_ref; } reg |= RTC_ENABLE_BIT; @@ -402,7 +430,7 @@ static int mxc_rtc_probe(struct platform_device *pdev) if (((readw(pdata->ioaddr + RTC_RTCCTL)) & RTC_ENABLE_BIT) == 0) { dev_err(&pdev->dev, "hardware module can't be enabled!\n"); ret = -EIO; - goto exit_put_clk; + goto exit_put_clk_ref; } platform_set_drvdata(pdev, pdata); @@ -424,15 +452,17 @@ static int mxc_rtc_probe(struct platform_device *pdev) THIS_MODULE); if (IS_ERR(rtc)) { ret = PTR_ERR(rtc); - goto exit_put_clk; + goto exit_put_clk_ref; } pdata->rtc = rtc; return 0; -exit_put_clk: - clk_disable_unprepare(pdata->clk); +exit_put_clk_ref: + clk_disable_unprepare(pdata->clk_ref); +exit_put_clk_ipg: + clk_disable_unprepare(pdata->clk_ipg); return ret; } @@ -441,7 +471,8 @@ static int mxc_rtc_remove(struct platform_device *pdev) { struct rtc_plat_data *pdata = platform_get_drvdata(pdev); - clk_disable_unprepare(pdata->clk); + clk_disable_unprepare(pdata->clk_ref); + clk_disable_unprepare(pdata->clk_ipg); return 0; } @@ -473,6 +504,7 @@ static SIMPLE_DEV_PM_OPS(mxc_rtc_pm_ops, mxc_rtc_suspend, mxc_rtc_resume); static struct platform_driver mxc_rtc_driver = { .driver = { .name = "mxc_rtc", + .of_match_table = of_match_ptr(imx_rtc_dt_ids), .pm = &mxc_rtc_pm_ops, }, .id_table = imx_rtc_devtype, diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c index 8b6355ffaff9..ec2e9c5fb993 100644 --- a/drivers/rtc/rtc-omap.c +++ b/drivers/rtc/rtc-omap.c @@ -25,6 +25,7 @@ #include <linux/of_device.h> #include <linux/pm_runtime.h> #include <linux/io.h> +#include <linux/clk.h> /* * The OMAP RTC is a year/month/day/hours/minutes/seconds BCD clock @@ -107,6 +108,7 @@ /* OMAP_RTC_OSC_REG bit fields: */ #define OMAP_RTC_OSC_32KCLK_EN BIT(6) +#define OMAP_RTC_OSC_SEL_32KCLK_SRC BIT(3) /* OMAP_RTC_IRQWAKEEN bit fields: */ #define OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN BIT(1) @@ -132,10 +134,12 @@ struct omap_rtc_device_type { struct omap_rtc { struct rtc_device *rtc; void __iomem *base; + struct clk *clk; int irq_alarm; int irq_timer; u8 interrupts_reg; bool is_pmic_controller; + bool has_ext_clk; const struct omap_rtc_device_type *type; }; @@ -553,6 +557,15 @@ static int omap_rtc_probe(struct platform_device *pdev) if (rtc->irq_alarm <= 0) return -ENOENT; + rtc->clk = devm_clk_get(&pdev->dev, "ext-clk"); + if (!IS_ERR(rtc->clk)) + rtc->has_ext_clk = true; + else + rtc->clk = devm_clk_get(&pdev->dev, "int-clk"); + + if (!IS_ERR(rtc->clk)) + clk_prepare_enable(rtc->clk); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); rtc->base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(rtc->base)) @@ -627,6 +640,16 @@ static int omap_rtc_probe(struct platform_device *pdev) if (reg != new_ctrl) rtc_write(rtc, OMAP_RTC_CTRL_REG, new_ctrl); + /* + * If we have the external clock then switch to it so we can keep + * ticking across suspend. + */ + if (rtc->has_ext_clk) { + reg = rtc_read(rtc, OMAP_RTC_OSC_REG); + rtc_write(rtc, OMAP_RTC_OSC_REG, + reg | OMAP_RTC_OSC_SEL_32KCLK_SRC); + } + rtc->type->lock(rtc); device_init_wakeup(&pdev->dev, true); @@ -672,6 +695,7 @@ err: static int __exit omap_rtc_remove(struct platform_device *pdev) { struct omap_rtc *rtc = platform_get_drvdata(pdev); + u8 reg; if (pm_power_off == omap_rtc_power_off && omap_rtc_power_off_rtc == rtc) { @@ -681,10 +705,19 @@ static int __exit omap_rtc_remove(struct platform_device *pdev) device_init_wakeup(&pdev->dev, 0); + if (!IS_ERR(rtc->clk)) + clk_disable_unprepare(rtc->clk); + rtc->type->unlock(rtc); /* leave rtc running, but disable irqs */ rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, 0); + if (rtc->has_ext_clk) { + reg = rtc_read(rtc, OMAP_RTC_OSC_REG); + reg &= ~OMAP_RTC_OSC_SEL_32KCLK_SRC; + rtc_write(rtc, OMAP_RTC_OSC_REG, reg); + } + rtc->type->lock(rtc); /* Disable the clock/module */ diff --git a/drivers/rtc/rtc-opal.c b/drivers/rtc/rtc-opal.c index 7061dcae2b09..6fbf9e617151 100644 --- a/drivers/rtc/rtc-opal.c +++ b/drivers/rtc/rtc-opal.c @@ -190,11 +190,9 @@ exit: return rc; } -static const struct rtc_class_ops opal_rtc_ops = { +static struct rtc_class_ops opal_rtc_ops = { .read_time = opal_get_rtc_time, .set_time = opal_set_rtc_time, - .read_alarm = opal_get_tpo_time, - .set_alarm = opal_set_tpo_time, }; static int opal_rtc_probe(struct platform_device *pdev) @@ -202,8 +200,11 @@ static int opal_rtc_probe(struct platform_device *pdev) struct rtc_device *rtc; if (pdev->dev.of_node && of_get_property(pdev->dev.of_node, "has-tpo", - NULL)) + NULL)) { device_set_wakeup_capable(&pdev->dev, true); + opal_rtc_ops.read_alarm = opal_get_tpo_time; + opal_rtc_ops.set_alarm = opal_set_tpo_time; + } rtc = devm_rtc_device_register(&pdev->dev, DRVNAME, &opal_rtc_ops, THIS_MODULE); @@ -236,7 +237,6 @@ static struct platform_driver opal_rtc_driver = { .id_table = opal_rtc_driver_ids, .driver = { .name = DRVNAME, - .owner = THIS_MODULE, .of_match_table = opal_rtc_match, }, }; diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c index 8a7556cbcb7f..1c47650fe624 100644 --- a/drivers/rtc/rtc-pcf2123.c +++ b/drivers/rtc/rtc-pcf2123.c @@ -165,13 +165,7 @@ static int pcf2123_rtc_read_time(struct device *dev, struct rtc_time *tm) tm->tm_sec, tm->tm_min, tm->tm_hour, tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); - /* the clock can give out invalid datetime, but we cannot return - * -EINVAL otherwise hwclock will refuse to set the time on bootup. - */ - if (rtc_valid_tm(tm) < 0) - dev_err(dev, "retrieved date/time is not valid.\n"); - - return 0; + return rtc_valid_tm(tm); } static int pcf2123_rtc_set_time(struct device *dev, struct rtc_time *tm) diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c index 9bd842e97749..4b11d31f7174 100644 --- a/drivers/rtc/rtc-pcf2127.c +++ b/drivers/rtc/rtc-pcf2127.c @@ -33,11 +33,14 @@ #define PCF2127_REG_MO (0x08) #define PCF2127_REG_YR (0x09) +#define PCF2127_OSF BIT(7) /* Oscillator Fail flag */ + static struct i2c_driver pcf2127_driver; struct pcf2127 { struct rtc_device *rtc; int voltage_low; /* indicates if a low_voltage was detected */ + int oscillator_failed; /* OSF was detected and date is unreliable */ }; /* @@ -59,7 +62,18 @@ static int pcf2127_get_datetime(struct i2c_client *client, struct rtc_time *tm) if (buf[PCF2127_REG_CTRL3] & 0x04) { pcf2127->voltage_low = 1; dev_info(&client->dev, - "low voltage detected, date/time is not reliable.\n"); + "low voltage detected, check/replace RTC battery.\n"); + } + + if (buf[PCF2127_REG_SC] & PCF2127_OSF) { + /* + * no need clear the flag here, + * it will be cleared once the new date is saved + */ + pcf2127->oscillator_failed = 1; + dev_warn(&client->dev, + "oscillator stop detected, date/time is not reliable\n"); + return -EINVAL; } dev_dbg(&client->dev, @@ -88,17 +102,12 @@ static int pcf2127_get_datetime(struct i2c_client *client, struct rtc_time *tm) tm->tm_sec, tm->tm_min, tm->tm_hour, tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); - /* the clock can give out invalid datetime, but we cannot return - * -EINVAL otherwise hwclock will refuse to set the time on bootup. - */ - if (rtc_valid_tm(tm) < 0) - dev_err(&client->dev, "retrieved date/time is not valid.\n"); - - return 0; + return rtc_valid_tm(tm); } static int pcf2127_set_datetime(struct i2c_client *client, struct rtc_time *tm) { + struct pcf2127 *pcf2127 = i2c_get_clientdata(client); unsigned char buf[8]; int i = 0, err; @@ -112,7 +121,7 @@ static int pcf2127_set_datetime(struct i2c_client *client, struct rtc_time *tm) buf[i++] = PCF2127_REG_SC; /* hours, minutes and seconds */ - buf[i++] = bin2bcd(tm->tm_sec); + buf[i++] = bin2bcd(tm->tm_sec); /* this will also clear OSF flag */ buf[i++] = bin2bcd(tm->tm_min); buf[i++] = bin2bcd(tm->tm_hour); buf[i++] = bin2bcd(tm->tm_mday); @@ -132,6 +141,9 @@ static int pcf2127_set_datetime(struct i2c_client *client, struct rtc_time *tm) return -EIO; } + /* clear OSF flag in client data */ + pcf2127->oscillator_failed = 0; + return 0; } @@ -144,7 +156,9 @@ static int pcf2127_rtc_ioctl(struct device *dev, switch (cmd) { case RTC_VL_READ: if (pcf2127->voltage_low) - dev_info(dev, "low voltage detected, date/time is not reliable.\n"); + dev_info(dev, "low voltage detected, check/replace battery\n"); + if (pcf2127->oscillator_failed) + dev_info(dev, "oscillator stop detected, date/time is not reliable\n"); if (copy_to_user((void __user *)arg, &pcf2127->voltage_low, sizeof(int))) @@ -217,7 +231,6 @@ MODULE_DEVICE_TABLE(of, pcf2127_of_match); static struct i2c_driver pcf2127_driver = { .driver = { .name = "rtc-pcf2127", - .owner = THIS_MODULE, .of_match_table = of_match_ptr(pcf2127_of_match), }, .probe = pcf2127_probe, diff --git a/drivers/rtc/rtc-pcf85063.c b/drivers/rtc/rtc-pcf85063.c index 6a12bf62c504..b6d73dd881f2 100644 --- a/drivers/rtc/rtc-pcf85063.c +++ b/drivers/rtc/rtc-pcf85063.c @@ -189,7 +189,6 @@ MODULE_DEVICE_TABLE(of, pcf85063_of_match); static struct i2c_driver pcf85063_driver = { .driver = { .name = "rtc-pcf85063", - .owner = THIS_MODULE, .of_match_table = of_match_ptr(pcf85063_of_match), }, .probe = pcf85063_probe, diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c index 4cdb64be061b..e7ebcc0b7e59 100644 --- a/drivers/rtc/rtc-pcf8523.c +++ b/drivers/rtc/rtc-pcf8523.c @@ -334,7 +334,6 @@ MODULE_DEVICE_TABLE(of, pcf8523_of_match); static struct i2c_driver pcf8523_driver = { .driver = { .name = DRIVER_NAME, - .owner = THIS_MODULE, .of_match_table = of_match_ptr(pcf8523_of_match), }, .probe = pcf8523_probe, diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c index 8bba022be946..e569243db57e 100644 --- a/drivers/rtc/rtc-pcf8563.c +++ b/drivers/rtc/rtc-pcf8563.c @@ -483,7 +483,6 @@ MODULE_DEVICE_TABLE(of, pcf8563_of_match); static struct i2c_driver pcf8563_driver = { .driver = { .name = "rtc-pcf8563", - .owner = THIS_MODULE, .of_match_table = of_match_ptr(pcf8563_of_match), }, .probe = pcf8563_probe, diff --git a/drivers/rtc/rtc-pcf8583.c b/drivers/rtc/rtc-pcf8583.c index 5911a6dca291..7ca9e8871d77 100644 --- a/drivers/rtc/rtc-pcf8583.c +++ b/drivers/rtc/rtc-pcf8583.c @@ -309,7 +309,6 @@ MODULE_DEVICE_TABLE(i2c, pcf8583_id); static struct i2c_driver pcf8583_driver = { .driver = { .name = "pcf8583", - .owner = THIS_MODULE, }, .probe = pcf8583_probe, .id_table = pcf8583_id, diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c index 99181fff88fd..41dcb7ddb906 100644 --- a/drivers/rtc/rtc-pl031.c +++ b/drivers/rtc/rtc-pl031.c @@ -476,6 +476,6 @@ static struct amba_driver pl031_driver = { module_amba_driver(pl031_driver); -MODULE_AUTHOR("Deepak Saxena <[email protected]"); +MODULE_AUTHOR("Deepak Saxena <[email protected]>"); MODULE_DESCRIPTION("ARM AMBA PL031 RTC Driver"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-pxa.c b/drivers/rtc/rtc-pxa.c index 4561f375327d..fe4985b54608 100644 --- a/drivers/rtc/rtc-pxa.c +++ b/drivers/rtc/rtc-pxa.c @@ -32,6 +32,8 @@ #include <mach/hardware.h> +#include "rtc-sa1100.h" + #define RTC_DEF_DIVIDER (32768 - 1) #define RTC_DEF_TRIM 0 #define MAXFREQ_PERIODIC 1000 @@ -86,10 +88,9 @@ __raw_writel((value), (pxa_rtc)->base + (reg)) struct pxa_rtc { + struct sa1100_rtc sa1100_rtc; struct resource *ress; void __iomem *base; - int irq_1Hz; - int irq_Alrm; struct rtc_device *rtc; spinlock_t lock; /* Protects this structure */ }; @@ -184,25 +185,25 @@ static int pxa_rtc_open(struct device *dev) struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); int ret; - ret = request_irq(pxa_rtc->irq_1Hz, pxa_rtc_irq, 0, + ret = request_irq(pxa_rtc->sa1100_rtc.irq_1hz, pxa_rtc_irq, 0, "rtc 1Hz", dev); if (ret < 0) { - dev_err(dev, "can't get irq %i, err %d\n", pxa_rtc->irq_1Hz, - ret); + dev_err(dev, "can't get irq %i, err %d\n", + pxa_rtc->sa1100_rtc.irq_1hz, ret); goto err_irq_1Hz; } - ret = request_irq(pxa_rtc->irq_Alrm, pxa_rtc_irq, 0, + ret = request_irq(pxa_rtc->sa1100_rtc.irq_alarm, pxa_rtc_irq, 0, "rtc Alrm", dev); if (ret < 0) { - dev_err(dev, "can't get irq %i, err %d\n", pxa_rtc->irq_Alrm, - ret); + dev_err(dev, "can't get irq %i, err %d\n", + pxa_rtc->sa1100_rtc.irq_alarm, ret); goto err_irq_Alrm; } return 0; err_irq_Alrm: - free_irq(pxa_rtc->irq_1Hz, dev); + free_irq(pxa_rtc->sa1100_rtc.irq_1hz, dev); err_irq_1Hz: return ret; } @@ -215,8 +216,8 @@ static void pxa_rtc_release(struct device *dev) rtsr_clear_bits(pxa_rtc, RTSR_PIALE | RTSR_RDALE1 | RTSR_HZE); spin_unlock_irq(&pxa_rtc->lock); - free_irq(pxa_rtc->irq_Alrm, dev); - free_irq(pxa_rtc->irq_1Hz, dev); + free_irq(pxa_rtc->sa1100_rtc.irq_1hz, dev); + free_irq(pxa_rtc->sa1100_rtc.irq_alarm, dev); } static int pxa_alarm_irq_enable(struct device *dev, unsigned int enabled) @@ -320,12 +321,13 @@ static int __init pxa_rtc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct pxa_rtc *pxa_rtc; + struct sa1100_rtc *sa1100_rtc; int ret; - u32 rttr; pxa_rtc = devm_kzalloc(dev, sizeof(*pxa_rtc), GFP_KERNEL); if (!pxa_rtc) return -ENOMEM; + sa1100_rtc = &pxa_rtc->sa1100_rtc; spin_lock_init(&pxa_rtc->lock); platform_set_drvdata(pdev, pxa_rtc); @@ -336,13 +338,13 @@ static int __init pxa_rtc_probe(struct platform_device *pdev) return -ENXIO; } - pxa_rtc->irq_1Hz = platform_get_irq(pdev, 0); - if (pxa_rtc->irq_1Hz < 0) { + sa1100_rtc->irq_1hz = platform_get_irq(pdev, 0); + if (sa1100_rtc->irq_1hz < 0) { dev_err(dev, "No 1Hz IRQ resource defined\n"); return -ENXIO; } - pxa_rtc->irq_Alrm = platform_get_irq(pdev, 1); - if (pxa_rtc->irq_Alrm < 0) { + sa1100_rtc->irq_alarm = platform_get_irq(pdev, 1); + if (sa1100_rtc->irq_alarm < 0) { dev_err(dev, "No alarm IRQ resource defined\n"); return -ENXIO; } @@ -354,15 +356,14 @@ static int __init pxa_rtc_probe(struct platform_device *pdev) return -ENOMEM; } - /* - * If the clock divider is uninitialized then reset it to the - * default value to get the 1Hz clock. - */ - if (rtc_readl(pxa_rtc, RTTR) == 0) { - rttr = RTC_DEF_DIVIDER + (RTC_DEF_TRIM << 16); - rtc_writel(pxa_rtc, RTTR, rttr); - dev_warn(dev, "warning: initializing default clock" - " divider/trim value\n"); + sa1100_rtc->rcnr = pxa_rtc->base + 0x0; + sa1100_rtc->rtsr = pxa_rtc->base + 0x8; + sa1100_rtc->rtar = pxa_rtc->base + 0x4; + sa1100_rtc->rttr = pxa_rtc->base + 0xc; + ret = sa1100_rtc_init(pdev, sa1100_rtc); + if (!ret) { + dev_err(dev, "Unable to init SA1100 RTC sub-device\n"); + return ret; } rtsr_clear_bits(pxa_rtc, RTSR_PIALE | RTSR_RDALE1 | RTSR_HZE); @@ -402,7 +403,7 @@ static int pxa_rtc_suspend(struct device *dev) struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); if (device_may_wakeup(dev)) - enable_irq_wake(pxa_rtc->irq_Alrm); + enable_irq_wake(pxa_rtc->sa1100_rtc.irq_alarm); return 0; } @@ -411,7 +412,7 @@ static int pxa_rtc_resume(struct device *dev) struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); if (device_may_wakeup(dev)) - disable_irq_wake(pxa_rtc->irq_Alrm); + disable_irq_wake(pxa_rtc->sa1100_rtc.irq_alarm); return 0; } #endif diff --git a/drivers/rtc/rtc-rp5c01.c b/drivers/rtc/rtc-rp5c01.c index b548551f385c..026035373ae6 100644 --- a/drivers/rtc/rtc-rp5c01.c +++ b/drivers/rtc/rtc-rp5c01.c @@ -170,7 +170,7 @@ static ssize_t rp5c01_nvram_read(struct file *filp, struct kobject *kobj, spin_lock_irq(&priv->lock); - for (count = 0; size > 0 && pos < RP5C01_MODE; count++, size--) { + for (count = 0; count < size; count++) { u8 data; rp5c01_write(priv, @@ -200,7 +200,7 @@ static ssize_t rp5c01_nvram_write(struct file *filp, struct kobject *kobj, spin_lock_irq(&priv->lock); - for (count = 0; size > 0 && pos < RP5C01_MODE; count++, size--) { + for (count = 0; count < size; count++) { u8 data = *buf++; rp5c01_write(priv, diff --git a/drivers/rtc/rtc-rx8025.c b/drivers/rtc/rtc-rx8025.c index e6298e02b400..24c3d69ce1b9 100644 --- a/drivers/rtc/rtc-rx8025.c +++ b/drivers/rtc/rtc-rx8025.c @@ -18,13 +18,11 @@ * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. */ -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/init.h> #include <linux/bcd.h> +#include <linux/bitops.h> #include <linux/i2c.h> -#include <linux/list.h> +#include <linux/kernel.h> +#include <linux/module.h> #include <linux/rtc.h> /* Register definitions */ @@ -48,17 +46,17 @@ #define RX8025_BIT_CTRL1_CT (7 << 0) /* 1 Hz periodic level irq */ #define RX8025_BIT_CTRL1_CT_1HZ 4 -#define RX8025_BIT_CTRL1_TEST (1 << 3) -#define RX8025_BIT_CTRL1_1224 (1 << 5) -#define RX8025_BIT_CTRL1_DALE (1 << 6) -#define RX8025_BIT_CTRL1_WALE (1 << 7) - -#define RX8025_BIT_CTRL2_DAFG (1 << 0) -#define RX8025_BIT_CTRL2_WAFG (1 << 1) -#define RX8025_BIT_CTRL2_CTFG (1 << 2) -#define RX8025_BIT_CTRL2_PON (1 << 4) -#define RX8025_BIT_CTRL2_XST (1 << 5) -#define RX8025_BIT_CTRL2_VDET (1 << 6) +#define RX8025_BIT_CTRL1_TEST BIT(3) +#define RX8025_BIT_CTRL1_1224 BIT(5) +#define RX8025_BIT_CTRL1_DALE BIT(6) +#define RX8025_BIT_CTRL1_WALE BIT(7) + +#define RX8025_BIT_CTRL2_DAFG BIT(0) +#define RX8025_BIT_CTRL2_WAFG BIT(1) +#define RX8025_BIT_CTRL2_CTFG BIT(2) +#define RX8025_BIT_CTRL2_PON BIT(4) +#define RX8025_BIT_CTRL2_XST BIT(5) +#define RX8025_BIT_CTRL2_VDET BIT(6) /* Clock precision adjustment */ #define RX8025_ADJ_RESOLUTION 3050 /* in ppb */ @@ -74,84 +72,84 @@ MODULE_DEVICE_TABLE(i2c, rx8025_id); struct rx8025_data { struct i2c_client *client; struct rtc_device *rtc; - struct work_struct work; u8 ctrl1; - unsigned exiting:1; }; -static int rx8025_read_reg(struct i2c_client *client, int number, u8 *value) +static s32 rx8025_read_reg(const struct i2c_client *client, u8 number) { - int ret = i2c_smbus_read_byte_data(client, (number << 4) | 0x08); - - if (ret < 0) { - dev_err(&client->dev, "Unable to read register #%d\n", number); - return ret; - } - - *value = ret; - return 0; + return i2c_smbus_read_byte_data(client, number << 4); } -static int rx8025_read_regs(struct i2c_client *client, - int number, u8 length, u8 *values) +static int rx8025_read_regs(const struct i2c_client *client, + u8 number, u8 length, u8 *values) { - int ret = i2c_smbus_read_i2c_block_data(client, (number << 4) | 0x08, - length, values); - - if (ret != length) { - dev_err(&client->dev, "Unable to read registers #%d..#%d\n", - number, number + length - 1); + int ret = i2c_smbus_read_i2c_block_data(client, number << 4, length, + values); + if (ret != length) return ret < 0 ? ret : -EIO; - } return 0; } -static int rx8025_write_reg(struct i2c_client *client, int number, u8 value) +static s32 rx8025_write_reg(const struct i2c_client *client, u8 number, + u8 value) { - int ret = i2c_smbus_write_byte_data(client, number << 4, value); - - if (ret) - dev_err(&client->dev, "Unable to write register #%d\n", - number); + return i2c_smbus_write_byte_data(client, number << 4, value); +} - return ret; +static s32 rx8025_write_regs(const struct i2c_client *client, + u8 number, u8 length, const u8 *values) +{ + return i2c_smbus_write_i2c_block_data(client, number << 4, + length, values); } -static int rx8025_write_regs(struct i2c_client *client, - int number, u8 length, u8 *values) +static int rx8025_check_validity(struct device *dev) { - int ret = i2c_smbus_write_i2c_block_data(client, (number << 4) | 0x08, - length, values); + struct rx8025_data *rx8025 = dev_get_drvdata(dev); + int ctrl2; + + ctrl2 = rx8025_read_reg(rx8025->client, RX8025_REG_CTRL2); + if (ctrl2 < 0) + return ctrl2; + + if (ctrl2 & RX8025_BIT_CTRL2_VDET) + dev_warn(dev, "power voltage drop detected\n"); + + if (ctrl2 & RX8025_BIT_CTRL2_PON) { + dev_warn(dev, "power-on reset detected, date is invalid\n"); + return -EINVAL; + } - if (ret) - dev_err(&client->dev, "Unable to write registers #%d..#%d\n", - number, number + length - 1); + if (!(ctrl2 & RX8025_BIT_CTRL2_XST)) { + dev_warn(dev, "crystal stopped, date is invalid\n"); + return -EINVAL; + } - return ret; + return 0; } -static irqreturn_t rx8025_irq(int irq, void *dev_id) +static int rx8025_reset_validity(struct i2c_client *client) { - struct i2c_client *client = dev_id; - struct rx8025_data *rx8025 = i2c_get_clientdata(client); + int ctrl2 = rx8025_read_reg(client, RX8025_REG_CTRL2); - disable_irq_nosync(irq); - schedule_work(&rx8025->work); - return IRQ_HANDLED; + if (ctrl2 < 0) + return ctrl2; + + ctrl2 &= ~(RX8025_BIT_CTRL2_PON | RX8025_BIT_CTRL2_VDET); + + return rx8025_write_reg(client, RX8025_REG_CTRL2, + ctrl2 | RX8025_BIT_CTRL2_XST); } -static void rx8025_work(struct work_struct *work) +static irqreturn_t rx8025_handle_irq(int irq, void *dev_id) { - struct rx8025_data *rx8025 = container_of(work, struct rx8025_data, - work); - struct i2c_client *client = rx8025->client; - struct mutex *lock = &rx8025->rtc->ops_lock; - u8 status; - - mutex_lock(lock); + struct i2c_client *client = dev_id; + struct rx8025_data *rx8025 = i2c_get_clientdata(client); + int status; - if (rx8025_read_reg(client, RX8025_REG_CTRL2, &status)) + status = rx8025_read_reg(client, RX8025_REG_CTRL2); + if (status < 0) goto out; if (!(status & RX8025_BIT_CTRL2_XST)) @@ -161,9 +159,7 @@ static void rx8025_work(struct work_struct *work) if (status & RX8025_BIT_CTRL2_CTFG) { /* periodic */ status &= ~RX8025_BIT_CTRL2_CTFG; - local_irq_disable(); rtc_update_irq(rx8025->rtc, 1, RTC_PF | RTC_IRQF); - local_irq_enable(); } if (status & RX8025_BIT_CTRL2_DAFG) { @@ -172,20 +168,11 @@ static void rx8025_work(struct work_struct *work) if (rx8025_write_reg(client, RX8025_REG_CTRL1, rx8025->ctrl1 & ~RX8025_BIT_CTRL1_DALE)) goto out; - local_irq_disable(); rtc_update_irq(rx8025->rtc, 1, RTC_AF | RTC_IRQF); - local_irq_enable(); } - /* acknowledge IRQ */ - rx8025_write_reg(client, RX8025_REG_CTRL2, - status | RX8025_BIT_CTRL2_XST); - out: - if (!rx8025->exiting) - enable_irq(client->irq); - - mutex_unlock(lock); + return IRQ_HANDLED; } static int rx8025_get_time(struct device *dev, struct rtc_time *dt) @@ -194,6 +181,10 @@ static int rx8025_get_time(struct device *dev, struct rtc_time *dt) u8 date[7]; int err; + err = rx8025_check_validity(dev); + if (err) + return err; + err = rx8025_read_regs(rx8025->client, RX8025_REG_SEC, 7, date); if (err) return err; @@ -213,10 +204,7 @@ static int rx8025_get_time(struct device *dev, struct rtc_time *dt) dt->tm_mday = bcd2bin(date[RX8025_REG_MDAY] & 0x3f); dt->tm_mon = bcd2bin(date[RX8025_REG_MONTH] & 0x1f) - 1; - dt->tm_year = bcd2bin(date[RX8025_REG_YEAR]); - - if (dt->tm_year < 70) - dt->tm_year += 100; + dt->tm_year = bcd2bin(date[RX8025_REG_YEAR]) + 100; dev_dbg(dev, "%s: date %ds %dm %dh %dmd %dm %dy\n", __func__, dt->tm_sec, dt->tm_min, dt->tm_hour, @@ -229,12 +217,10 @@ static int rx8025_set_time(struct device *dev, struct rtc_time *dt) { struct rx8025_data *rx8025 = dev_get_drvdata(dev); u8 date[7]; + int ret; - /* - * BUG: The HW assumes every year that is a multiple of 4 to be a leap - * year. Next time this is wrong is 2100, which will not be a leap - * year. - */ + if ((dt->tm_year < 100) || (dt->tm_year > 199)) + return -EINVAL; /* * Here the read-only bits are written as "0". I'm not sure if that @@ -251,17 +237,21 @@ static int rx8025_set_time(struct device *dev, struct rtc_time *dt) date[RX8025_REG_WDAY] = bin2bcd(dt->tm_wday); date[RX8025_REG_MDAY] = bin2bcd(dt->tm_mday); date[RX8025_REG_MONTH] = bin2bcd(dt->tm_mon + 1); - date[RX8025_REG_YEAR] = bin2bcd(dt->tm_year % 100); + date[RX8025_REG_YEAR] = bin2bcd(dt->tm_year - 100); dev_dbg(dev, "%s: write 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n", __func__, date[0], date[1], date[2], date[3], date[4], date[5], date[6]); - return rx8025_write_regs(rx8025->client, RX8025_REG_SEC, 7, date); + ret = rx8025_write_regs(rx8025->client, RX8025_REG_SEC, 7, date); + if (ret < 0) + return ret; + + return rx8025_reset_validity(rx8025->client); } -static int rx8025_init_client(struct i2c_client *client, int *need_reset) +static int rx8025_init_client(struct i2c_client *client) { struct rx8025_data *rx8025 = i2c_get_clientdata(client); u8 ctrl[2], ctrl2; @@ -275,38 +265,18 @@ static int rx8025_init_client(struct i2c_client *client, int *need_reset) /* Keep test bit zero ! */ rx8025->ctrl1 = ctrl[0] & ~RX8025_BIT_CTRL1_TEST; - if (ctrl[1] & RX8025_BIT_CTRL2_PON) { - dev_warn(&client->dev, "power-on reset was detected, " - "you may have to readjust the clock\n"); - *need_reset = 1; - } - - if (ctrl[1] & RX8025_BIT_CTRL2_VDET) { - dev_warn(&client->dev, "a power voltage drop was detected, " - "you may have to readjust the clock\n"); - *need_reset = 1; - } - - if (!(ctrl[1] & RX8025_BIT_CTRL2_XST)) { - dev_warn(&client->dev, "Oscillation stop was detected," - "you may have to readjust the clock\n"); - *need_reset = 1; - } - if (ctrl[1] & (RX8025_BIT_CTRL2_DAFG | RX8025_BIT_CTRL2_WAFG)) { dev_warn(&client->dev, "Alarm was detected\n"); need_clear = 1; } - if (!(ctrl[1] & RX8025_BIT_CTRL2_CTFG)) + if (ctrl[1] & RX8025_BIT_CTRL2_CTFG) need_clear = 1; - if (*need_reset || need_clear) { - ctrl2 = ctrl[0]; - ctrl2 &= ~(RX8025_BIT_CTRL2_PON | RX8025_BIT_CTRL2_VDET | - RX8025_BIT_CTRL2_CTFG | RX8025_BIT_CTRL2_WAFG | + if (need_clear) { + ctrl2 = ctrl[1]; + ctrl2 &= ~(RX8025_BIT_CTRL2_CTFG | RX8025_BIT_CTRL2_WAFG | RX8025_BIT_CTRL2_DAFG); - ctrl2 |= RX8025_BIT_CTRL2_XST; err = rx8025_write_reg(client, RX8025_REG_CTRL2, ctrl2); } @@ -319,8 +289,8 @@ static int rx8025_read_alarm(struct device *dev, struct rtc_wkalrm *t) { struct rx8025_data *rx8025 = dev_get_drvdata(dev); struct i2c_client *client = rx8025->client; - u8 ctrl2, ald[2]; - int err; + u8 ald[2]; + int ctrl2, err; if (client->irq <= 0) return -EINVAL; @@ -329,9 +299,9 @@ static int rx8025_read_alarm(struct device *dev, struct rtc_wkalrm *t) if (err) return err; - err = rx8025_read_reg(client, RX8025_REG_CTRL2, &ctrl2); - if (err) - return err; + ctrl2 = rx8025_read_reg(client, RX8025_REG_CTRL2); + if (ctrl2 < 0) + return ctrl2; dev_dbg(dev, "%s: read alarm 0x%02x 0x%02x ctrl2 %02x\n", __func__, ald[0], ald[1], ctrl2); @@ -452,12 +422,11 @@ static struct rtc_class_ops rx8025_rtc_ops = { static int rx8025_get_clock_adjust(struct device *dev, int *adj) { struct i2c_client *client = to_i2c_client(dev); - u8 digoff; - int err; + int digoff; - err = rx8025_read_reg(client, RX8025_REG_DIGOFF, &digoff); - if (err) - return err; + digoff = rx8025_read_reg(client, RX8025_REG_DIGOFF); + if (digoff < 0) + return digoff; *adj = digoff >= 64 ? digoff - 128 : digoff; if (*adj > 0) @@ -539,88 +508,53 @@ static int rx8025_probe(struct i2c_client *client, { struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); struct rx8025_data *rx8025; - int err, need_reset = 0; + int err = 0; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_I2C_BLOCK)) { dev_err(&adapter->dev, "doesn't support required functionality\n"); - err = -EIO; - goto errout; + return -EIO; } rx8025 = devm_kzalloc(&client->dev, sizeof(*rx8025), GFP_KERNEL); if (!rx8025) { - err = -ENOMEM; - goto errout; + return -ENOMEM; } rx8025->client = client; i2c_set_clientdata(client, rx8025); - INIT_WORK(&rx8025->work, rx8025_work); - err = rx8025_init_client(client, &need_reset); + err = rx8025_init_client(client); if (err) - goto errout; - - if (need_reset) { - struct rtc_time tm; - dev_info(&client->dev, - "bad conditions detected, resetting date\n"); - rtc_time_to_tm(0, &tm); /* 1970/1/1 */ - rx8025_set_time(&client->dev, &tm); - } + return err; rx8025->rtc = devm_rtc_device_register(&client->dev, client->name, &rx8025_rtc_ops, THIS_MODULE); if (IS_ERR(rx8025->rtc)) { - err = PTR_ERR(rx8025->rtc); dev_err(&client->dev, "unable to register the class device\n"); - goto errout; + return PTR_ERR(rx8025->rtc); } if (client->irq > 0) { dev_info(&client->dev, "IRQ %d supplied\n", client->irq); - err = request_irq(client->irq, rx8025_irq, - 0, "rx8025", client); + err = devm_request_threaded_irq(&client->dev, client->irq, NULL, + rx8025_handle_irq, 0, "rx8025", + client); if (err) { - dev_err(&client->dev, "unable to request IRQ\n"); - goto errout; + dev_err(&client->dev, "unable to request IRQ, alarms disabled\n"); + client->irq = 0; } } - rx8025->rtc->irq_freq = 1; rx8025->rtc->max_user_freq = 1; err = rx8025_sysfs_register(&client->dev); - if (err) - goto errout_irq; - - return 0; - -errout_irq: - if (client->irq > 0) - free_irq(client->irq, client); - -errout: - dev_err(&adapter->dev, "probing for rx8025 failed\n"); return err; } static int rx8025_remove(struct i2c_client *client) { - struct rx8025_data *rx8025 = i2c_get_clientdata(client); - struct mutex *lock = &rx8025->rtc->ops_lock; - - if (client->irq > 0) { - mutex_lock(lock); - rx8025->exiting = 1; - mutex_unlock(lock); - - free_irq(client->irq, client); - cancel_work_sync(&rx8025->work); - } - rx8025_sysfs_unregister(&client->dev); return 0; } @@ -628,7 +562,6 @@ static int rx8025_remove(struct i2c_client *client) static struct i2c_driver rx8025_driver = { .driver = { .name = "rtc-rx8025", - .owner = THIS_MODULE, }, .probe = rx8025_probe, .remove = rx8025_remove, diff --git a/drivers/rtc/rtc-rx8581.c b/drivers/rtc/rtc-rx8581.c index de8d9c427782..161e25d016c3 100644 --- a/drivers/rtc/rtc-rx8581.c +++ b/drivers/rtc/rtc-rx8581.c @@ -315,7 +315,6 @@ MODULE_DEVICE_TABLE(i2c, rx8581_id); static struct i2c_driver rx8581_driver = { .driver = { .name = "rtc-rx8581", - .owner = THIS_MODULE, }, .probe = rx8581_probe, .id_table = rx8581_id, diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c index a0f832362199..7cc8f73a3fe8 100644 --- a/drivers/rtc/rtc-s3c.c +++ b/drivers/rtc/rtc-s3c.c @@ -39,6 +39,7 @@ struct s3c_rtc { void __iomem *base; struct clk *rtc_clk; struct clk *rtc_src_clk; + bool clk_disabled; struct s3c_rtc_data *data; @@ -71,9 +72,12 @@ static void s3c_rtc_enable_clk(struct s3c_rtc *info) unsigned long irq_flags; spin_lock_irqsave(&info->alarm_clk_lock, irq_flags); - clk_enable(info->rtc_clk); - if (info->data->needs_src_clk) - clk_enable(info->rtc_src_clk); + if (info->clk_disabled) { + clk_enable(info->rtc_clk); + if (info->data->needs_src_clk) + clk_enable(info->rtc_src_clk); + info->clk_disabled = false; + } spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags); } @@ -82,9 +86,12 @@ static void s3c_rtc_disable_clk(struct s3c_rtc *info) unsigned long irq_flags; spin_lock_irqsave(&info->alarm_clk_lock, irq_flags); - if (info->data->needs_src_clk) - clk_disable(info->rtc_src_clk); - clk_disable(info->rtc_clk); + if (!info->clk_disabled) { + if (info->data->needs_src_clk) + clk_disable(info->rtc_src_clk); + clk_disable(info->rtc_clk); + info->clk_disabled = true; + } spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags); } @@ -128,6 +135,11 @@ static int s3c_rtc_setaie(struct device *dev, unsigned int enabled) s3c_rtc_disable_clk(info); + if (enabled) + s3c_rtc_enable_clk(info); + else + s3c_rtc_disable_clk(info); + return 0; } @@ -410,8 +422,9 @@ static int s3c_rtc_remove(struct platform_device *pdev) s3c_rtc_setaie(info->dev, 0); + if (info->data->needs_src_clk) + clk_unprepare(info->rtc_src_clk); clk_unprepare(info->rtc_clk); - info->rtc_clk = NULL; return 0; } @@ -482,6 +495,7 @@ static int s3c_rtc_probe(struct platform_device *pdev) if (IS_ERR(info->rtc_src_clk)) { dev_err(&pdev->dev, "failed to find rtc source clock\n"); + clk_disable_unprepare(info->rtc_clk); return PTR_ERR(info->rtc_src_clk); } clk_prepare_enable(info->rtc_src_clk); diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c index 8c70d785ba73..f2504b4eef34 100644 --- a/drivers/rtc/rtc-s5m.c +++ b/drivers/rtc/rtc-s5m.c @@ -635,6 +635,16 @@ static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info) case S2MPS13X: data[0] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); ret = regmap_write(info->regmap, info->regs->ctrl, data[0]); + if (ret < 0) + break; + + /* + * Should set WUDR & (RUDR or AUDR) bits to high after writing + * RTC_CTRL register like writing Alarm registers. We can't find + * the description from datasheet but vendor code does that + * really. + */ + ret = s5m8767_rtc_set_alarm_reg(info); break; default: @@ -797,6 +807,7 @@ static const struct platform_device_id s5m_rtc_id[] = { { "s2mps14-rtc", S2MPS14X }, { }, }; +MODULE_DEVICE_TABLE(platform, s5m_rtc_id); static struct platform_driver s5m_rtc_driver = { .driver = { diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c index b6e1ca08c2c0..c2187bf6c7e4 100644 --- a/drivers/rtc/rtc-sa1100.c +++ b/drivers/rtc/rtc-sa1100.c @@ -35,24 +35,17 @@ #include <linux/bitops.h> #include <linux/io.h> -#include <mach/hardware.h> -#include <mach/irqs.h> +#define RTSR_HZE BIT(3) /* HZ interrupt enable */ +#define RTSR_ALE BIT(2) /* RTC alarm interrupt enable */ +#define RTSR_HZ BIT(1) /* HZ rising-edge detected */ +#define RTSR_AL BIT(0) /* RTC alarm detected */ -#if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP) -#include <mach/regs-rtc.h> -#endif +#include "rtc-sa1100.h" #define RTC_DEF_DIVIDER (32768 - 1) #define RTC_DEF_TRIM 0 #define RTC_FREQ 1024 -struct sa1100_rtc { - spinlock_t lock; - int irq_1hz; - int irq_alarm; - struct rtc_device *rtc; - struct clk *clk; -}; static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id) { @@ -63,16 +56,16 @@ static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id) spin_lock(&info->lock); - rtsr = RTSR; + rtsr = readl_relaxed(info->rtsr); /* clear interrupt sources */ - RTSR = 0; + writel_relaxed(0, info->rtsr); /* Fix for a nasty initialization problem the in SA11xx RTSR register. * See also the comments in sa1100_rtc_probe(). */ if (rtsr & (RTSR_ALE | RTSR_HZE)) { /* This is the original code, before there was the if test * above. This code does not clear interrupts that were not * enabled. */ - RTSR = (RTSR_AL | RTSR_HZ) & (rtsr >> 2); + writel_relaxed((RTSR_AL | RTSR_HZ) & (rtsr >> 2), info->rtsr); } else { /* For some reason, it is possible to enter this routine * without interruptions enabled, it has been tested with @@ -81,13 +74,13 @@ static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id) * This situation leads to an infinite "loop" of interrupt * routine calling and as a result the processor seems to * lock on its first call to open(). */ - RTSR = RTSR_AL | RTSR_HZ; + writel_relaxed(RTSR_AL | RTSR_HZ, info->rtsr); } /* clear alarm interrupt if it has occurred */ if (rtsr & RTSR_AL) rtsr &= ~RTSR_ALE; - RTSR = rtsr & (RTSR_ALE | RTSR_HZE); + writel_relaxed(rtsr & (RTSR_ALE | RTSR_HZE), info->rtsr); /* update irq data & counter */ if (rtsr & RTSR_AL) @@ -135,7 +128,7 @@ static void sa1100_rtc_release(struct device *dev) struct sa1100_rtc *info = dev_get_drvdata(dev); spin_lock_irq(&info->lock); - RTSR = 0; + writel_relaxed(0, info->rtsr); spin_unlock_irq(&info->lock); free_irq(info->irq_alarm, dev); @@ -144,39 +137,46 @@ static void sa1100_rtc_release(struct device *dev) static int sa1100_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { + u32 rtsr; struct sa1100_rtc *info = dev_get_drvdata(dev); spin_lock_irq(&info->lock); + rtsr = readl_relaxed(info->rtsr); if (enabled) - RTSR |= RTSR_ALE; + rtsr |= RTSR_ALE; else - RTSR &= ~RTSR_ALE; + rtsr &= ~RTSR_ALE; + writel_relaxed(rtsr, info->rtsr); spin_unlock_irq(&info->lock); return 0; } static int sa1100_rtc_read_time(struct device *dev, struct rtc_time *tm) { - rtc_time_to_tm(RCNR, tm); + struct sa1100_rtc *info = dev_get_drvdata(dev); + + rtc_time_to_tm(readl_relaxed(info->rcnr), tm); return 0; } static int sa1100_rtc_set_time(struct device *dev, struct rtc_time *tm) { + struct sa1100_rtc *info = dev_get_drvdata(dev); unsigned long time; int ret; ret = rtc_tm_to_time(tm, &time); if (ret == 0) - RCNR = time; + writel_relaxed(time, info->rcnr); return ret; } static int sa1100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { u32 rtsr; + struct sa1100_rtc *info = dev_get_drvdata(dev); - rtsr = RTSR; + rtsr = readl_relaxed(info->rtsr); alrm->enabled = (rtsr & RTSR_ALE) ? 1 : 0; alrm->pending = (rtsr & RTSR_AL) ? 1 : 0; return 0; @@ -192,12 +192,13 @@ static int sa1100_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) ret = rtc_tm_to_time(&alrm->time, &time); if (ret != 0) goto out; - RTSR = RTSR & (RTSR_HZE|RTSR_ALE|RTSR_AL); - RTAR = time; + writel_relaxed(readl_relaxed(info->rtsr) & + (RTSR_HZE | RTSR_ALE | RTSR_AL), info->rtsr); + writel_relaxed(time, info->rtar); if (alrm->enabled) - RTSR |= RTSR_ALE; + writel_relaxed(readl_relaxed(info->rtsr) | RTSR_ALE, info->rtsr); else - RTSR &= ~RTSR_ALE; + writel_relaxed(readl_relaxed(info->rtsr) & ~RTSR_ALE, info->rtsr); out: spin_unlock_irq(&info->lock); @@ -206,8 +207,10 @@ out: static int sa1100_rtc_proc(struct device *dev, struct seq_file *seq) { - seq_printf(seq, "trim/divider\t\t: 0x%08x\n", (u32) RTTR); - seq_printf(seq, "RTSR\t\t\t: 0x%08x\n", (u32)RTSR); + struct sa1100_rtc *info = dev_get_drvdata(dev); + + seq_printf(seq, "trim/divider\t\t: 0x%08x\n", readl_relaxed(info->rttr)); + seq_printf(seq, "RTSR\t\t\t: 0x%08x\n", readl_relaxed(info->rtsr)); return 0; } @@ -223,29 +226,18 @@ static const struct rtc_class_ops sa1100_rtc_ops = { .alarm_irq_enable = sa1100_rtc_alarm_irq_enable, }; -static int sa1100_rtc_probe(struct platform_device *pdev) +int sa1100_rtc_init(struct platform_device *pdev, struct sa1100_rtc *info) { struct rtc_device *rtc; - struct sa1100_rtc *info; - int irq_1hz, irq_alarm, ret = 0; + int ret; - irq_1hz = platform_get_irq_byname(pdev, "rtc 1Hz"); - irq_alarm = platform_get_irq_byname(pdev, "rtc alarm"); - if (irq_1hz < 0 || irq_alarm < 0) - return -ENODEV; + spin_lock_init(&info->lock); - info = devm_kzalloc(&pdev->dev, sizeof(struct sa1100_rtc), GFP_KERNEL); - if (!info) - return -ENOMEM; info->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(info->clk)) { dev_err(&pdev->dev, "failed to find rtc clock source\n"); return PTR_ERR(info->clk); } - info->irq_1hz = irq_1hz; - info->irq_alarm = irq_alarm; - spin_lock_init(&info->lock); - platform_set_drvdata(pdev, info); ret = clk_prepare_enable(info->clk); if (ret) @@ -257,22 +249,19 @@ static int sa1100_rtc_probe(struct platform_device *pdev) * If the clock divider is uninitialized then reset it to the * default value to get the 1Hz clock. */ - if (RTTR == 0) { - RTTR = RTC_DEF_DIVIDER + (RTC_DEF_TRIM << 16); + if (readl_relaxed(info->rttr) == 0) { + writel_relaxed(RTC_DEF_DIVIDER + (RTC_DEF_TRIM << 16), info->rttr); dev_warn(&pdev->dev, "warning: " "initializing default clock divider/trim value\n"); /* The current RTC value probably doesn't make sense either */ - RCNR = 0; + writel_relaxed(0, info->rcnr); } - device_init_wakeup(&pdev->dev, 1); - rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &sa1100_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc)) { - ret = PTR_ERR(rtc); - goto err_dev; + clk_disable_unprepare(info->clk); + return PTR_ERR(rtc); } info->rtc = rtc; @@ -298,12 +287,52 @@ static int sa1100_rtc_probe(struct platform_device *pdev) * * Notice that clearing bit 1 and 0 is accomplished by writting ONES to * the corresponding bits in RTSR. */ - RTSR = RTSR_AL | RTSR_HZ; + writel_relaxed(RTSR_AL | RTSR_HZ, info->rtsr); return 0; -err_dev: - clk_disable_unprepare(info->clk); - return ret; +} +EXPORT_SYMBOL_GPL(sa1100_rtc_init); + +static int sa1100_rtc_probe(struct platform_device *pdev) +{ + struct sa1100_rtc *info; + struct resource *iores; + void __iomem *base; + int irq_1hz, irq_alarm; + + irq_1hz = platform_get_irq_byname(pdev, "rtc 1Hz"); + irq_alarm = platform_get_irq_byname(pdev, "rtc alarm"); + if (irq_1hz < 0 || irq_alarm < 0) + return -ENODEV; + + info = devm_kzalloc(&pdev->dev, sizeof(struct sa1100_rtc), GFP_KERNEL); + if (!info) + return -ENOMEM; + info->irq_1hz = irq_1hz; + info->irq_alarm = irq_alarm; + + iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(&pdev->dev, iores); + if (IS_ERR(base)) + return PTR_ERR(base); + + if (IS_ENABLED(CONFIG_ARCH_SA1100) || + of_device_is_compatible(pdev->dev.of_node, "mrvl,sa1100-rtc")) { + info->rcnr = base + 0x04; + info->rtsr = base + 0x10; + info->rtar = base + 0x00; + info->rttr = base + 0x08; + } else { + info->rcnr = base + 0x0; + info->rtsr = base + 0x8; + info->rtar = base + 0x4; + info->rttr = base + 0xc; + } + + platform_set_drvdata(pdev, info); + device_init_wakeup(&pdev->dev, 1); + + return sa1100_rtc_init(pdev, info); } static int sa1100_rtc_remove(struct platform_device *pdev) diff --git a/drivers/rtc/rtc-sa1100.h b/drivers/rtc/rtc-sa1100.h new file mode 100644 index 000000000000..2c79c0c57822 --- /dev/null +++ b/drivers/rtc/rtc-sa1100.h @@ -0,0 +1,23 @@ +#ifndef __RTC_SA1100_H__ +#define __RTC_SA1100_H__ + +#include <linux/kernel.h> + +struct clk; +struct platform_device; + +struct sa1100_rtc { + spinlock_t lock; + void __iomem *rcnr; + void __iomem *rtar; + void __iomem *rtsr; + void __iomem *rttr; + int irq_1hz; + int irq_alarm; + struct rtc_device *rtc; + struct clk *clk; +}; + +int sa1100_rtc_init(struct platform_device *pdev, struct sa1100_rtc *info); + +#endif diff --git a/drivers/rtc/rtc-sirfsoc.c b/drivers/rtc/rtc-sirfsoc.c index edc3b43282d4..7367f617145c 100644 --- a/drivers/rtc/rtc-sirfsoc.c +++ b/drivers/rtc/rtc-sirfsoc.c @@ -13,6 +13,7 @@ #include <linux/slab.h> #include <linux/io.h> #include <linux/of.h> +#include <linux/regmap.h> #include <linux/rtc/sirfsoc_rtciobrg.h> @@ -48,12 +49,27 @@ struct sirfsoc_rtc_drv { /* Overflow for every 8 years extra time */ u32 overflow_rtc; spinlock_t lock; + struct regmap *regmap; #ifdef CONFIG_PM u32 saved_counter; u32 saved_overflow_rtc; #endif }; +static u32 sirfsoc_rtc_readl(struct sirfsoc_rtc_drv *rtcdrv, u32 offset) +{ + u32 val; + + regmap_read(rtcdrv->regmap, rtcdrv->rtc_base + offset, &val); + return val; +} + +static void sirfsoc_rtc_writel(struct sirfsoc_rtc_drv *rtcdrv, + u32 offset, u32 val) +{ + regmap_write(rtcdrv->regmap, rtcdrv->rtc_base + offset, val); +} + static int sirfsoc_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { @@ -64,9 +80,9 @@ static int sirfsoc_rtc_read_alarm(struct device *dev, spin_lock_irq(&rtcdrv->lock); - rtc_count = sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_CN); + rtc_count = sirfsoc_rtc_readl(rtcdrv, RTC_CN); - rtc_alarm = sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_ALARM0); + rtc_alarm = sirfsoc_rtc_readl(rtcdrv, RTC_ALARM0); memset(alrm, 0, sizeof(struct rtc_wkalrm)); /* @@ -82,8 +98,7 @@ static int sirfsoc_rtc_read_alarm(struct device *dev, rtc_time_to_tm(rtcdrv->overflow_rtc << (BITS_PER_LONG - RTC_SHIFT) | rtc_alarm >> RTC_SHIFT, &(alrm->time)); - if (sirfsoc_rtc_iobrg_readl( - rtcdrv->rtc_base + RTC_STATUS) & SIRFSOC_RTC_AL0E) + if (sirfsoc_rtc_readl(rtcdrv, RTC_STATUS) & SIRFSOC_RTC_AL0E) alrm->enabled = 1; spin_unlock_irq(&rtcdrv->lock); @@ -103,8 +118,7 @@ static int sirfsoc_rtc_set_alarm(struct device *dev, spin_lock_irq(&rtcdrv->lock); - rtc_status_reg = sirfsoc_rtc_iobrg_readl( - rtcdrv->rtc_base + RTC_STATUS); + rtc_status_reg = sirfsoc_rtc_readl(rtcdrv, RTC_STATUS); if (rtc_status_reg & SIRFSOC_RTC_AL0E) { /* * An ongoing alarm in progress - ingore it and not @@ -113,8 +127,7 @@ static int sirfsoc_rtc_set_alarm(struct device *dev, dev_info(dev, "An old alarm was set, will be replaced by a new one\n"); } - sirfsoc_rtc_iobrg_writel( - rtc_alarm << RTC_SHIFT, rtcdrv->rtc_base + RTC_ALARM0); + sirfsoc_rtc_writel(rtcdrv, RTC_ALARM0, rtc_alarm << RTC_SHIFT); rtc_status_reg &= ~0x07; /* mask out the lower status bits */ /* * This bit RTC_AL sets it as a wake-up source for Sleep Mode @@ -123,8 +136,7 @@ static int sirfsoc_rtc_set_alarm(struct device *dev, rtc_status_reg |= SIRFSOC_RTC_AL0; /* enable the RTC alarm interrupt */ rtc_status_reg |= SIRFSOC_RTC_AL0E; - sirfsoc_rtc_iobrg_writel( - rtc_status_reg, rtcdrv->rtc_base + RTC_STATUS); + sirfsoc_rtc_writel(rtcdrv, RTC_STATUS, rtc_status_reg); spin_unlock_irq(&rtcdrv->lock); } else { @@ -135,8 +147,7 @@ static int sirfsoc_rtc_set_alarm(struct device *dev, */ spin_lock_irq(&rtcdrv->lock); - rtc_status_reg = sirfsoc_rtc_iobrg_readl( - rtcdrv->rtc_base + RTC_STATUS); + rtc_status_reg = sirfsoc_rtc_readl(rtcdrv, RTC_STATUS); if (rtc_status_reg & SIRFSOC_RTC_AL0E) { /* clear the RTC status register's alarm bit */ rtc_status_reg &= ~0x07; @@ -145,8 +156,8 @@ static int sirfsoc_rtc_set_alarm(struct device *dev, /* Clear the Alarm enable bit */ rtc_status_reg &= ~(SIRFSOC_RTC_AL0E); - sirfsoc_rtc_iobrg_writel(rtc_status_reg, - rtcdrv->rtc_base + RTC_STATUS); + sirfsoc_rtc_writel(rtcdrv, RTC_STATUS, + rtc_status_reg); } spin_unlock_irq(&rtcdrv->lock); @@ -167,9 +178,9 @@ static int sirfsoc_rtc_read_time(struct device *dev, * fail, read several times to make sure get stable value. */ do { - tmp_rtc = sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_CN); + tmp_rtc = sirfsoc_rtc_readl(rtcdrv, RTC_CN); cpu_relax(); - } while (tmp_rtc != sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_CN)); + } while (tmp_rtc != sirfsoc_rtc_readl(rtcdrv, RTC_CN)); rtc_time_to_tm(rtcdrv->overflow_rtc << (BITS_PER_LONG - RTC_SHIFT) | tmp_rtc >> RTC_SHIFT, tm); @@ -187,10 +198,8 @@ static int sirfsoc_rtc_set_time(struct device *dev, rtcdrv->overflow_rtc = rtc_time >> (BITS_PER_LONG - RTC_SHIFT); - sirfsoc_rtc_iobrg_writel(rtcdrv->overflow_rtc, - rtcdrv->rtc_base + RTC_SW_VALUE); - sirfsoc_rtc_iobrg_writel( - rtc_time << RTC_SHIFT, rtcdrv->rtc_base + RTC_CN); + sirfsoc_rtc_writel(rtcdrv, RTC_SW_VALUE, rtcdrv->overflow_rtc); + sirfsoc_rtc_writel(rtcdrv, RTC_CN, rtc_time << RTC_SHIFT); return 0; } @@ -222,14 +231,13 @@ static int sirfsoc_rtc_alarm_irq_enable(struct device *dev, spin_lock_irq(&rtcdrv->lock); - rtc_status_reg = sirfsoc_rtc_iobrg_readl( - rtcdrv->rtc_base + RTC_STATUS); + rtc_status_reg = sirfsoc_rtc_readl(rtcdrv, RTC_STATUS); if (enabled) rtc_status_reg |= SIRFSOC_RTC_AL0E; else rtc_status_reg &= ~SIRFSOC_RTC_AL0E; - sirfsoc_rtc_iobrg_writel(rtc_status_reg, rtcdrv->rtc_base + RTC_STATUS); + sirfsoc_rtc_writel(rtcdrv, RTC_STATUS, rtc_status_reg); spin_unlock_irq(&rtcdrv->lock); @@ -254,7 +262,7 @@ static irqreturn_t sirfsoc_rtc_irq_handler(int irq, void *pdata) spin_lock(&rtcdrv->lock); - rtc_status_reg = sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_STATUS); + rtc_status_reg = sirfsoc_rtc_readl(rtcdrv, RTC_STATUS); /* this bit will be set ONLY if an alarm was active * and it expired NOW * So this is being used as an ASSERT @@ -270,7 +278,8 @@ static irqreturn_t sirfsoc_rtc_irq_handler(int irq, void *pdata) /* Clear the Alarm enable bit */ rtc_status_reg &= ~(SIRFSOC_RTC_AL0E); } - sirfsoc_rtc_iobrg_writel(rtc_status_reg, rtcdrv->rtc_base + RTC_STATUS); + + sirfsoc_rtc_writel(rtcdrv, RTC_STATUS, rtc_status_reg); spin_unlock(&rtcdrv->lock); @@ -287,6 +296,13 @@ static const struct of_device_id sirfsoc_rtc_of_match[] = { { .compatible = "sirf,prima2-sysrtc"}, {}, }; + +const struct regmap_config sysrtc_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .fast_io = true, +}; + MODULE_DEVICE_TABLE(of, sirfsoc_rtc_of_match); static int sirfsoc_rtc_probe(struct platform_device *pdev) @@ -314,27 +330,35 @@ static int sirfsoc_rtc_probe(struct platform_device *pdev) /* Register rtc alarm as a wakeup source */ device_init_wakeup(&pdev->dev, 1); + rtcdrv->regmap = devm_regmap_init_iobg(&pdev->dev, + &sysrtc_regmap_config); + if (IS_ERR(rtcdrv->regmap)) { + err = PTR_ERR(rtcdrv->regmap); + dev_err(&pdev->dev, "Failed to allocate register map: %d\n", + err); + return err; + } + /* * Set SYS_RTC counter in RTC_HZ HZ Units * We are using 32K RTC crystal (32768 / RTC_HZ / 2) -1 * If 16HZ, therefore RTC_DIV = 1023; */ rtc_div = ((32768 / RTC_HZ) / 2) - 1; - sirfsoc_rtc_iobrg_writel(rtc_div, rtcdrv->rtc_base + RTC_DIV); + sirfsoc_rtc_writel(rtcdrv, RTC_DIV, rtc_div); /* 0x3 -> RTC_CLK */ - sirfsoc_rtc_iobrg_writel(SIRFSOC_RTC_CLK, - rtcdrv->rtc_base + RTC_CLOCK_SWITCH); + sirfsoc_rtc_writel(rtcdrv, RTC_CLOCK_SWITCH, SIRFSOC_RTC_CLK); /* reset SYS RTC ALARM0 */ - sirfsoc_rtc_iobrg_writel(0x0, rtcdrv->rtc_base + RTC_ALARM0); + sirfsoc_rtc_writel(rtcdrv, RTC_ALARM0, 0x0); /* reset SYS RTC ALARM1 */ - sirfsoc_rtc_iobrg_writel(0x0, rtcdrv->rtc_base + RTC_ALARM1); + sirfsoc_rtc_writel(rtcdrv, RTC_ALARM1, 0x0); /* Restore RTC Overflow From Register After Command Reboot */ rtcdrv->overflow_rtc = - sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_SW_VALUE); + sirfsoc_rtc_readl(rtcdrv, RTC_SW_VALUE); rtcdrv->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &sirfsoc_rtc_ops, THIS_MODULE); @@ -372,10 +396,10 @@ static int sirfsoc_rtc_suspend(struct device *dev) { struct sirfsoc_rtc_drv *rtcdrv = dev_get_drvdata(dev); rtcdrv->overflow_rtc = - sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_SW_VALUE); + sirfsoc_rtc_readl(rtcdrv, RTC_SW_VALUE); rtcdrv->saved_counter = - sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_CN); + sirfsoc_rtc_readl(rtcdrv, RTC_CN); rtcdrv->saved_overflow_rtc = rtcdrv->overflow_rtc; if (device_may_wakeup(dev) && !enable_irq_wake(rtcdrv->irq)) rtcdrv->irq_wake = 1; @@ -392,12 +416,10 @@ static int sirfsoc_rtc_resume(struct device *dev) * if resume from snapshot and the rtc power is lost, * restroe the rtc settings */ - if (SIRFSOC_RTC_CLK != sirfsoc_rtc_iobrg_readl( - rtcdrv->rtc_base + RTC_CLOCK_SWITCH)) { + if (SIRFSOC_RTC_CLK != sirfsoc_rtc_readl(rtcdrv, RTC_CLOCK_SWITCH)) { u32 rtc_div; /* 0x3 -> RTC_CLK */ - sirfsoc_rtc_iobrg_writel(SIRFSOC_RTC_CLK, - rtcdrv->rtc_base + RTC_CLOCK_SWITCH); + sirfsoc_rtc_writel(rtcdrv, RTC_CLOCK_SWITCH, SIRFSOC_RTC_CLK); /* * Set SYS_RTC counter in RTC_HZ HZ Units * We are using 32K RTC crystal (32768 / RTC_HZ / 2) -1 @@ -405,13 +427,13 @@ static int sirfsoc_rtc_resume(struct device *dev) */ rtc_div = ((32768 / RTC_HZ) / 2) - 1; - sirfsoc_rtc_iobrg_writel(rtc_div, rtcdrv->rtc_base + RTC_DIV); + sirfsoc_rtc_writel(rtcdrv, RTC_DIV, rtc_div); /* reset SYS RTC ALARM0 */ - sirfsoc_rtc_iobrg_writel(0x0, rtcdrv->rtc_base + RTC_ALARM0); + sirfsoc_rtc_writel(rtcdrv, RTC_ALARM0, 0x0); /* reset SYS RTC ALARM1 */ - sirfsoc_rtc_iobrg_writel(0x0, rtcdrv->rtc_base + RTC_ALARM1); + sirfsoc_rtc_writel(rtcdrv, RTC_ALARM1, 0x0); } rtcdrv->overflow_rtc = rtcdrv->saved_overflow_rtc; @@ -419,15 +441,14 @@ static int sirfsoc_rtc_resume(struct device *dev) * if current counter is small than previous, * it means overflow in sleep */ - tmp = sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_CN); + tmp = sirfsoc_rtc_readl(rtcdrv, RTC_CN); if (tmp <= rtcdrv->saved_counter) rtcdrv->overflow_rtc++; /* *PWRC Value Be Changed When Suspend, Restore Overflow * In Memory To Register */ - sirfsoc_rtc_iobrg_writel(rtcdrv->overflow_rtc, - rtcdrv->rtc_base + RTC_SW_VALUE); + sirfsoc_rtc_writel(rtcdrv, RTC_SW_VALUE, rtcdrv->overflow_rtc); if (device_may_wakeup(dev) && rtcdrv->irq_wake) { disable_irq_wake(rtcdrv->irq); diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c index d87a85cefb66..950c5d0b6dca 100644 --- a/drivers/rtc/rtc-snvs.c +++ b/drivers/rtc/rtc-snvs.c @@ -18,6 +18,10 @@ #include <linux/platform_device.h> #include <linux/rtc.h> #include <linux/clk.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#define SNVS_LPREGISTER_OFFSET 0x34 /* These register offsets are relative to LP (Low Power) range */ #define SNVS_LPCR 0x04 @@ -37,31 +41,36 @@ struct snvs_rtc_data { struct rtc_device *rtc; - void __iomem *ioaddr; + struct regmap *regmap; + int offset; int irq; - spinlock_t lock; struct clk *clk; }; -static u32 rtc_read_lp_counter(void __iomem *ioaddr) +static u32 rtc_read_lp_counter(struct snvs_rtc_data *data) { u64 read1, read2; + u32 val; do { - read1 = readl(ioaddr + SNVS_LPSRTCMR); + regmap_read(data->regmap, data->offset + SNVS_LPSRTCMR, &val); + read1 = val; read1 <<= 32; - read1 |= readl(ioaddr + SNVS_LPSRTCLR); + regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &val); + read1 |= val; - read2 = readl(ioaddr + SNVS_LPSRTCMR); + regmap_read(data->regmap, data->offset + SNVS_LPSRTCMR, &val); + read2 = val; read2 <<= 32; - read2 |= readl(ioaddr + SNVS_LPSRTCLR); + regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &val); + read2 |= val; } while (read1 != read2); /* Convert 47-bit counter to 32-bit raw second count */ return (u32) (read1 >> CNTR_TO_SECS_SH); } -static void rtc_write_sync_lp(void __iomem *ioaddr) +static void rtc_write_sync_lp(struct snvs_rtc_data *data) { u32 count1, count2, count3; int i; @@ -69,15 +78,15 @@ static void rtc_write_sync_lp(void __iomem *ioaddr) /* Wait for 3 CKIL cycles */ for (i = 0; i < 3; i++) { do { - count1 = readl(ioaddr + SNVS_LPSRTCLR); - count2 = readl(ioaddr + SNVS_LPSRTCLR); + regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count1); + regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count2); } while (count1 != count2); /* Now wait until counter value changes */ do { do { - count2 = readl(ioaddr + SNVS_LPSRTCLR); - count3 = readl(ioaddr + SNVS_LPSRTCLR); + regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count2); + regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count3); } while (count2 != count3); } while (count3 == count1); } @@ -85,23 +94,14 @@ static void rtc_write_sync_lp(void __iomem *ioaddr) static int snvs_rtc_enable(struct snvs_rtc_data *data, bool enable) { - unsigned long flags; int timeout = 1000; u32 lpcr; - spin_lock_irqsave(&data->lock, flags); - - lpcr = readl(data->ioaddr + SNVS_LPCR); - if (enable) - lpcr |= SNVS_LPCR_SRTC_ENV; - else - lpcr &= ~SNVS_LPCR_SRTC_ENV; - writel(lpcr, data->ioaddr + SNVS_LPCR); - - spin_unlock_irqrestore(&data->lock, flags); + regmap_update_bits(data->regmap, data->offset + SNVS_LPCR, SNVS_LPCR_SRTC_ENV, + enable ? SNVS_LPCR_SRTC_ENV : 0); while (--timeout) { - lpcr = readl(data->ioaddr + SNVS_LPCR); + regmap_read(data->regmap, data->offset + SNVS_LPCR, &lpcr); if (enable) { if (lpcr & SNVS_LPCR_SRTC_ENV) @@ -121,7 +121,7 @@ static int snvs_rtc_enable(struct snvs_rtc_data *data, bool enable) static int snvs_rtc_read_time(struct device *dev, struct rtc_time *tm) { struct snvs_rtc_data *data = dev_get_drvdata(dev); - unsigned long time = rtc_read_lp_counter(data->ioaddr); + unsigned long time = rtc_read_lp_counter(data); rtc_time_to_tm(time, tm); @@ -139,8 +139,8 @@ static int snvs_rtc_set_time(struct device *dev, struct rtc_time *tm) snvs_rtc_enable(data, false); /* Write 32-bit time to 47-bit timer, leaving 15 LSBs blank */ - writel(time << CNTR_TO_SECS_SH, data->ioaddr + SNVS_LPSRTCLR); - writel(time >> (32 - CNTR_TO_SECS_SH), data->ioaddr + SNVS_LPSRTCMR); + regmap_write(data->regmap, data->offset + SNVS_LPSRTCLR, time << CNTR_TO_SECS_SH); + regmap_write(data->regmap, data->offset + SNVS_LPSRTCMR, time >> (32 - CNTR_TO_SECS_SH)); /* Enable RTC again */ snvs_rtc_enable(data, true); @@ -153,10 +153,10 @@ static int snvs_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) struct snvs_rtc_data *data = dev_get_drvdata(dev); u32 lptar, lpsr; - lptar = readl(data->ioaddr + SNVS_LPTAR); + regmap_read(data->regmap, data->offset + SNVS_LPTAR, &lptar); rtc_time_to_tm(lptar, &alrm->time); - lpsr = readl(data->ioaddr + SNVS_LPSR); + regmap_read(data->regmap, data->offset + SNVS_LPSR, &lpsr); alrm->pending = (lpsr & SNVS_LPSR_LPTA) ? 1 : 0; return 0; @@ -165,21 +165,12 @@ static int snvs_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) static int snvs_rtc_alarm_irq_enable(struct device *dev, unsigned int enable) { struct snvs_rtc_data *data = dev_get_drvdata(dev); - u32 lpcr; - unsigned long flags; - - spin_lock_irqsave(&data->lock, flags); - lpcr = readl(data->ioaddr + SNVS_LPCR); - if (enable) - lpcr |= (SNVS_LPCR_LPTA_EN | SNVS_LPCR_LPWUI_EN); - else - lpcr &= ~(SNVS_LPCR_LPTA_EN | SNVS_LPCR_LPWUI_EN); - writel(lpcr, data->ioaddr + SNVS_LPCR); + regmap_update_bits(data->regmap, data->offset + SNVS_LPCR, + (SNVS_LPCR_LPTA_EN | SNVS_LPCR_LPWUI_EN), + enable ? (SNVS_LPCR_LPTA_EN | SNVS_LPCR_LPWUI_EN) : 0); - spin_unlock_irqrestore(&data->lock, flags); - - rtc_write_sync_lp(data->ioaddr); + rtc_write_sync_lp(data); return 0; } @@ -189,24 +180,14 @@ static int snvs_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) struct snvs_rtc_data *data = dev_get_drvdata(dev); struct rtc_time *alrm_tm = &alrm->time; unsigned long time; - unsigned long flags; - u32 lpcr; rtc_tm_to_time(alrm_tm, &time); - spin_lock_irqsave(&data->lock, flags); - - /* Have to clear LPTA_EN before programming new alarm time in LPTAR */ - lpcr = readl(data->ioaddr + SNVS_LPCR); - lpcr &= ~SNVS_LPCR_LPTA_EN; - writel(lpcr, data->ioaddr + SNVS_LPCR); - - spin_unlock_irqrestore(&data->lock, flags); - - writel(time, data->ioaddr + SNVS_LPTAR); + regmap_update_bits(data->regmap, data->offset + SNVS_LPCR, SNVS_LPCR_LPTA_EN, 0); + regmap_write(data->regmap, data->offset + SNVS_LPTAR, time); /* Clear alarm interrupt status bit */ - writel(SNVS_LPSR_LPTA, data->ioaddr + SNVS_LPSR); + regmap_write(data->regmap, data->offset + SNVS_LPSR, SNVS_LPSR_LPTA); return snvs_rtc_alarm_irq_enable(dev, alrm->enabled); } @@ -226,7 +207,7 @@ static irqreturn_t snvs_rtc_irq_handler(int irq, void *dev_id) u32 lpsr; u32 events = 0; - lpsr = readl(data->ioaddr + SNVS_LPSR); + regmap_read(data->regmap, data->offset + SNVS_LPSR, &lpsr); if (lpsr & SNVS_LPSR_LPTA) { events |= (RTC_AF | RTC_IRQF); @@ -238,25 +219,48 @@ static irqreturn_t snvs_rtc_irq_handler(int irq, void *dev_id) } /* clear interrupt status */ - writel(lpsr, data->ioaddr + SNVS_LPSR); + regmap_write(data->regmap, data->offset + SNVS_LPSR, lpsr); return events ? IRQ_HANDLED : IRQ_NONE; } +static const struct regmap_config snvs_rtc_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + static int snvs_rtc_probe(struct platform_device *pdev) { struct snvs_rtc_data *data; struct resource *res; int ret; + void __iomem *mmio; data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - data->ioaddr = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(data->ioaddr)) - return PTR_ERR(data->ioaddr); + data->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "regmap"); + + if (IS_ERR(data->regmap)) { + dev_warn(&pdev->dev, "snvs rtc: you use old dts file, please update it\n"); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + mmio = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(mmio)) + return PTR_ERR(mmio); + + data->regmap = devm_regmap_init_mmio(&pdev->dev, mmio, &snvs_rtc_config); + } else { + data->offset = SNVS_LPREGISTER_OFFSET; + of_property_read_u32(pdev->dev.of_node, "offset", &data->offset); + } + + if (!data->regmap) { + dev_err(&pdev->dev, "Can't find snvs syscon\n"); + return -ENODEV; + } data->irq = platform_get_irq(pdev, 0); if (data->irq < 0) @@ -276,13 +280,11 @@ static int snvs_rtc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, data); - spin_lock_init(&data->lock); - /* Initialize glitch detect */ - writel(SNVS_LPPGDR_INIT, data->ioaddr + SNVS_LPPGDR); + regmap_write(data->regmap, data->offset + SNVS_LPPGDR, SNVS_LPPGDR_INIT); /* Clear interrupt status */ - writel(0xffffffff, data->ioaddr + SNVS_LPSR); + regmap_write(data->regmap, data->offset + SNVS_LPSR, 0xffffffff); /* Enable RTC */ snvs_rtc_enable(data, true); diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c index 3f9d0acb81c7..74c0a336ceea 100644 --- a/drivers/rtc/rtc-st-lpc.c +++ b/drivers/rtc/rtc-st-lpc.c @@ -208,7 +208,7 @@ static int st_rtc_probe(struct platform_device *pdev) return -EINVAL; } - /* LPC can either run in RTC or WDT mode */ + /* LPC can either run as a Clocksource or in RTC or WDT mode */ if (mode != ST_LPC_MODE_RTC) return -ENODEV; diff --git a/drivers/rtc/rtc-stk17ta8.c b/drivers/rtc/rtc-stk17ta8.c index 0e93b714ee41..ba6a83b5b5c9 100644 --- a/drivers/rtc/rtc-stk17ta8.c +++ b/drivers/rtc/rtc-stk17ta8.c @@ -254,7 +254,7 @@ static ssize_t stk17ta8_nvram_read(struct file *filp, struct kobject *kobj, void __iomem *ioaddr = pdata->ioaddr; ssize_t count; - for (count = 0; size > 0 && pos < RTC_OFFSET; count++, size--) + for (count = 0; count < size; count++) *buf++ = readb(ioaddr + pos++); return count; } @@ -269,7 +269,7 @@ static ssize_t stk17ta8_nvram_write(struct file *filp, struct kobject *kobj, void __iomem *ioaddr = pdata->ioaddr; ssize_t count; - for (count = 0; size > 0 && pos < RTC_OFFSET; count++, size--) + for (count = 0; count < size; count++) writeb(*buf++, ioaddr + pos++); return count; } diff --git a/drivers/rtc/rtc-sysfs.c b/drivers/rtc/rtc-sysfs.c index babd43bf3ddc..7273855ed02e 100644 --- a/drivers/rtc/rtc-sysfs.c +++ b/drivers/rtc/rtc-sysfs.c @@ -122,20 +122,8 @@ hctosys_show(struct device *dev, struct device_attribute *attr, char *buf) } static DEVICE_ATTR_RO(hctosys); -static struct attribute *rtc_attrs[] = { - &dev_attr_name.attr, - &dev_attr_date.attr, - &dev_attr_time.attr, - &dev_attr_since_epoch.attr, - &dev_attr_max_user_freq.attr, - &dev_attr_hctosys.attr, - NULL, -}; -ATTRIBUTE_GROUPS(rtc); - static ssize_t -rtc_sysfs_show_wakealarm(struct device *dev, struct device_attribute *attr, - char *buf) +wakealarm_show(struct device *dev, struct device_attribute *attr, char *buf) { ssize_t retval; unsigned long alarm; @@ -159,7 +147,7 @@ rtc_sysfs_show_wakealarm(struct device *dev, struct device_attribute *attr, } static ssize_t -rtc_sysfs_set_wakealarm(struct device *dev, struct device_attribute *attr, +wakealarm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) { ssize_t retval; @@ -221,45 +209,57 @@ rtc_sysfs_set_wakealarm(struct device *dev, struct device_attribute *attr, retval = rtc_set_alarm(rtc, &alm); return (retval < 0) ? retval : n; } -static DEVICE_ATTR(wakealarm, S_IRUGO | S_IWUSR, - rtc_sysfs_show_wakealarm, rtc_sysfs_set_wakealarm); +static DEVICE_ATTR_RW(wakealarm); +static struct attribute *rtc_attrs[] = { + &dev_attr_name.attr, + &dev_attr_date.attr, + &dev_attr_time.attr, + &dev_attr_since_epoch.attr, + &dev_attr_max_user_freq.attr, + &dev_attr_hctosys.attr, + &dev_attr_wakealarm.attr, + NULL, +}; /* The reason to trigger an alarm with no process watching it (via sysfs) * is its side effect: waking from a system state like suspend-to-RAM or * suspend-to-disk. So: no attribute unless that side effect is possible. * (Userspace may disable that mechanism later.) */ -static inline int rtc_does_wakealarm(struct rtc_device *rtc) +static bool rtc_does_wakealarm(struct rtc_device *rtc) { if (!device_can_wakeup(rtc->dev.parent)) - return 0; + return false; + return rtc->ops->set_alarm != NULL; } - -void rtc_sysfs_add_device(struct rtc_device *rtc) +static umode_t rtc_attr_is_visible(struct kobject *kobj, + struct attribute *attr, int n) { - int err; + struct device *dev = container_of(kobj, struct device, kobj); + struct rtc_device *rtc = to_rtc_device(dev); + umode_t mode = attr->mode; - /* not all RTCs support both alarms and wakeup */ - if (!rtc_does_wakealarm(rtc)) - return; + if (attr == &dev_attr_wakealarm.attr) + if (!rtc_does_wakealarm(rtc)) + mode = 0; - err = device_create_file(&rtc->dev, &dev_attr_wakealarm); - if (err) - dev_err(rtc->dev.parent, - "failed to create alarm attribute, %d\n", err); + return mode; } -void rtc_sysfs_del_device(struct rtc_device *rtc) -{ - /* REVISIT did we add it successfully? */ - if (rtc_does_wakealarm(rtc)) - device_remove_file(&rtc->dev, &dev_attr_wakealarm); -} +static struct attribute_group rtc_attr_group = { + .is_visible = rtc_attr_is_visible, + .attrs = rtc_attrs, +}; + +static const struct attribute_group *rtc_attr_groups[] = { + &rtc_attr_group, + NULL +}; -void __init rtc_sysfs_init(struct class *rtc_class) +const struct attribute_group **rtc_get_dev_attribute_groups(void) { - rtc_class->dev_groups = rtc_groups; + return rtc_attr_groups; } diff --git a/drivers/rtc/rtc-tx4939.c b/drivers/rtc/rtc-tx4939.c index cb7f94ede516..560d9a5e0225 100644 --- a/drivers/rtc/rtc-tx4939.c +++ b/drivers/rtc/rtc-tx4939.c @@ -199,8 +199,7 @@ static ssize_t tx4939_rtc_nvram_read(struct file *filp, struct kobject *kobj, ssize_t count; spin_lock_irq(&pdata->lock); - for (count = 0; size > 0 && pos < TX4939_RTC_REG_RAMSIZE; - count++, size--) { + for (count = 0; count < size; count++) { __raw_writel(pos++, &rtcreg->adr); *buf++ = __raw_readl(&rtcreg->dat); } @@ -218,8 +217,7 @@ static ssize_t tx4939_rtc_nvram_write(struct file *filp, struct kobject *kobj, ssize_t count; spin_lock_irq(&pdata->lock); - for (count = 0; size > 0 && pos < TX4939_RTC_REG_RAMSIZE; - count++, size--) { + for (count = 0; count < size; count++) { __raw_writel(pos++, &rtcreg->adr); __raw_writel(*buf++, &rtcreg->dat); } diff --git a/drivers/rtc/rtc-vt8500.c b/drivers/rtc/rtc-vt8500.c index a58b6d17e6f0..27e896995e9b 100644 --- a/drivers/rtc/rtc-vt8500.c +++ b/drivers/rtc/rtc-vt8500.c @@ -271,6 +271,7 @@ static const struct of_device_id wmt_dt_ids[] = { { .compatible = "via,vt8500-rtc", }, {} }; +MODULE_DEVICE_TABLE(of, wmt_dt_ids); static struct platform_driver vt8500_rtc_driver = { .probe = vt8500_rtc_probe, diff --git a/drivers/rtc/rtc-zynqmp.c b/drivers/rtc/rtc-zynqmp.c new file mode 100644 index 000000000000..8b28762f06df --- /dev/null +++ b/drivers/rtc/rtc-zynqmp.c @@ -0,0 +1,279 @@ +/* + * Xilinx Zynq Ultrascale+ MPSoC Real Time Clock Driver + * + * Copyright (C) 2015 Xilinx, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + * + */ + +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/rtc.h> + +/* RTC Registers */ +#define RTC_SET_TM_WR 0x00 +#define RTC_SET_TM_RD 0x04 +#define RTC_CALIB_WR 0x08 +#define RTC_CALIB_RD 0x0C +#define RTC_CUR_TM 0x10 +#define RTC_CUR_TICK 0x14 +#define RTC_ALRM 0x18 +#define RTC_INT_STS 0x20 +#define RTC_INT_MASK 0x24 +#define RTC_INT_EN 0x28 +#define RTC_INT_DIS 0x2C +#define RTC_CTRL 0x40 + +#define RTC_FR_EN BIT(20) +#define RTC_FR_DATSHIFT 16 +#define RTC_TICK_MASK 0xFFFF +#define RTC_INT_SEC BIT(0) +#define RTC_INT_ALRM BIT(1) +#define RTC_OSC_EN BIT(24) + +#define RTC_CALIB_DEF 0x198233 +#define RTC_CALIB_MASK 0x1FFFFF +#define RTC_SEC_MAX_VAL 0xFFFFFFFF + +struct xlnx_rtc_dev { + struct rtc_device *rtc; + void __iomem *reg_base; + int alarm_irq; + int sec_irq; +}; + +static int xlnx_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct xlnx_rtc_dev *xrtcdev = dev_get_drvdata(dev); + unsigned long new_time; + + new_time = rtc_tm_to_time64(tm); + + if (new_time > RTC_SEC_MAX_VAL) + return -EINVAL; + + writel(new_time, xrtcdev->reg_base + RTC_SET_TM_WR); + + return 0; +} + +static int xlnx_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct xlnx_rtc_dev *xrtcdev = dev_get_drvdata(dev); + + rtc_time64_to_tm(readl(xrtcdev->reg_base + RTC_CUR_TM), tm); + + return rtc_valid_tm(tm); +} + +static int xlnx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct xlnx_rtc_dev *xrtcdev = dev_get_drvdata(dev); + + rtc_time64_to_tm(readl(xrtcdev->reg_base + RTC_ALRM), &alrm->time); + alrm->enabled = readl(xrtcdev->reg_base + RTC_INT_MASK) & RTC_INT_ALRM; + + return 0; +} + +static int xlnx_rtc_alarm_irq_enable(struct device *dev, u32 enabled) +{ + struct xlnx_rtc_dev *xrtcdev = dev_get_drvdata(dev); + + if (enabled) + writel(RTC_INT_ALRM, xrtcdev->reg_base + RTC_INT_EN); + else + writel(RTC_INT_ALRM, xrtcdev->reg_base + RTC_INT_DIS); + + return 0; +} + +static int xlnx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct xlnx_rtc_dev *xrtcdev = dev_get_drvdata(dev); + unsigned long alarm_time; + + alarm_time = rtc_tm_to_time64(&alrm->time); + + if (alarm_time > RTC_SEC_MAX_VAL) + return -EINVAL; + + writel((u32)alarm_time, (xrtcdev->reg_base + RTC_ALRM)); + + xlnx_rtc_alarm_irq_enable(dev, alrm->enabled); + + return 0; +} + +static void xlnx_init_rtc(struct xlnx_rtc_dev *xrtcdev, u32 calibval) +{ + /* + * Based on crystal freq of 33.330 KHz + * set the seconds counter and enable, set fractions counter + * to default value suggested as per design spec + * to correct RTC delay in frequency over period of time. + */ + calibval &= RTC_CALIB_MASK; + writel(calibval, (xrtcdev->reg_base + RTC_CALIB_WR)); +} + +static const struct rtc_class_ops xlnx_rtc_ops = { + .set_time = xlnx_rtc_set_time, + .read_time = xlnx_rtc_read_time, + .read_alarm = xlnx_rtc_read_alarm, + .set_alarm = xlnx_rtc_set_alarm, + .alarm_irq_enable = xlnx_rtc_alarm_irq_enable, +}; + +static irqreturn_t xlnx_rtc_interrupt(int irq, void *id) +{ + struct xlnx_rtc_dev *xrtcdev = (struct xlnx_rtc_dev *)id; + unsigned int status; + + status = readl(xrtcdev->reg_base + RTC_INT_STS); + /* Check if interrupt asserted */ + if (!(status & (RTC_INT_SEC | RTC_INT_ALRM))) + return IRQ_NONE; + + /* Clear interrupt */ + writel(status, xrtcdev->reg_base + RTC_INT_STS); + + if (status & RTC_INT_SEC) + rtc_update_irq(xrtcdev->rtc, 1, RTC_IRQF | RTC_UF); + if (status & RTC_INT_ALRM) + rtc_update_irq(xrtcdev->rtc, 1, RTC_IRQF | RTC_AF); + + return IRQ_HANDLED; +} + +static int xlnx_rtc_probe(struct platform_device *pdev) +{ + struct xlnx_rtc_dev *xrtcdev; + struct resource *res; + int ret; + unsigned int calibvalue; + + xrtcdev = devm_kzalloc(&pdev->dev, sizeof(*xrtcdev), GFP_KERNEL); + if (!xrtcdev) + return -ENOMEM; + + platform_set_drvdata(pdev, xrtcdev); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + xrtcdev->reg_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(xrtcdev->reg_base)) + return PTR_ERR(xrtcdev->reg_base); + + xrtcdev->alarm_irq = platform_get_irq_byname(pdev, "alarm"); + if (xrtcdev->alarm_irq < 0) { + dev_err(&pdev->dev, "no irq resource\n"); + return xrtcdev->alarm_irq; + } + ret = devm_request_irq(&pdev->dev, xrtcdev->alarm_irq, + xlnx_rtc_interrupt, 0, + dev_name(&pdev->dev), xrtcdev); + if (ret) { + dev_err(&pdev->dev, "request irq failed\n"); + return ret; + } + + xrtcdev->sec_irq = platform_get_irq_byname(pdev, "sec"); + if (xrtcdev->sec_irq < 0) { + dev_err(&pdev->dev, "no irq resource\n"); + return xrtcdev->sec_irq; + } + ret = devm_request_irq(&pdev->dev, xrtcdev->sec_irq, + xlnx_rtc_interrupt, 0, + dev_name(&pdev->dev), xrtcdev); + if (ret) { + dev_err(&pdev->dev, "request irq failed\n"); + return ret; + } + + ret = of_property_read_u32(pdev->dev.of_node, "calibration", + &calibvalue); + if (ret) + calibvalue = RTC_CALIB_DEF; + + xlnx_init_rtc(xrtcdev, calibvalue); + + device_init_wakeup(&pdev->dev, 1); + + xrtcdev->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, + &xlnx_rtc_ops, THIS_MODULE); + return PTR_ERR_OR_ZERO(xrtcdev->rtc); +} + +static int xlnx_rtc_remove(struct platform_device *pdev) +{ + xlnx_rtc_alarm_irq_enable(&pdev->dev, 0); + device_init_wakeup(&pdev->dev, 0); + + return 0; +} + +static int __maybe_unused xlnx_rtc_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct xlnx_rtc_dev *xrtcdev = platform_get_drvdata(pdev); + + if (device_may_wakeup(&pdev->dev)) + enable_irq_wake(xrtcdev->alarm_irq); + else + xlnx_rtc_alarm_irq_enable(dev, 0); + + return 0; +} + +static int __maybe_unused xlnx_rtc_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct xlnx_rtc_dev *xrtcdev = platform_get_drvdata(pdev); + + if (device_may_wakeup(&pdev->dev)) + disable_irq_wake(xrtcdev->alarm_irq); + else + xlnx_rtc_alarm_irq_enable(dev, 1); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(xlnx_rtc_pm_ops, xlnx_rtc_suspend, xlnx_rtc_resume); + +static const struct of_device_id xlnx_rtc_of_match[] = { + {.compatible = "xlnx,zynqmp-rtc" }, + { } +}; +MODULE_DEVICE_TABLE(of, xlnx_rtc_of_match); + +static struct platform_driver xlnx_rtc_driver = { + .probe = xlnx_rtc_probe, + .remove = xlnx_rtc_remove, + .driver = { + .name = KBUILD_MODNAME, + .pm = &xlnx_rtc_pm_ops, + .of_match_table = xlnx_rtc_of_match, + }, +}; + +module_platform_driver(xlnx_rtc_driver); + +MODULE_DESCRIPTION("Xilinx Zynq MPSoC RTC driver"); +MODULE_AUTHOR("Xilinx Inc."); +MODULE_LICENSE("GPL v2"); |