diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/gpio/gpio-104-idi-48.c | 97 |
2 files changed, 21 insertions, 78 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 30f9e3f48559..84316924574f 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -875,7 +875,7 @@ config GPIO_104_IDI_48 select REGMAP_MMIO select REGMAP_IRQ select GPIOLIB_IRQCHIP - select GPIO_I8255 + select GPIO_REGMAP help Enables GPIO support for the ACCES 104-IDI-48 family (104-IDI-48A, 104-IDI-48AC, 104-IDI-48B, 104-IDI-48BC). The base port addresses for diff --git a/drivers/gpio/gpio-104-idi-48.c b/drivers/gpio/gpio-104-idi-48.c index f936e3e0ff12..ca2175b84e24 100644 --- a/drivers/gpio/gpio-104-idi-48.c +++ b/drivers/gpio/gpio-104-idi-48.c @@ -9,7 +9,7 @@ #include <linux/bits.h> #include <linux/device.h> #include <linux/err.h> -#include <linux/gpio/driver.h> +#include <linux/gpio/regmap.h> #include <linux/interrupt.h> #include <linux/ioport.h> #include <linux/irq.h> @@ -20,10 +20,6 @@ #include <linux/regmap.h> #include <linux/types.h> -#include "gpio-i8255.h" - -MODULE_IMPORT_NS(I8255); - #define IDI_48_EXTENT 8 #define MAX_NUM_IDI_48 max_num_isa_dev(IDI_48_EXTENT) @@ -40,56 +36,17 @@ MODULE_PARM_DESC(irq, "ACCES 104-IDI-48 interrupt line numbers"); #define IDI48_IRQ_STATUS 0x7 #define IDI48_IRQ_ENABLE IDI48_IRQ_STATUS -/** - * struct idi_48_reg - device register structure - * @port0: Port 0 Inputs - * @unused: Unused - * @port1: Port 1 Inputs - * @irq: Read: IRQ Status Register/IRQ Clear - * Write: IRQ Enable/Disable - */ -struct idi_48_reg { - u8 port0[3]; - u8 unused; - u8 port1[3]; - u8 irq; -}; - -/** - * struct idi_48_gpio - GPIO device private data structure - * @chip: instance of the gpio_chip - * @reg: I/O address offset for the device registers - */ -struct idi_48_gpio { - struct gpio_chip chip; - struct idi_48_reg __iomem *reg; -}; - -static int idi_48_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) -{ - return GPIO_LINE_DIRECTION_IN; -} - -static int idi_48_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) +static int idi_48_reg_mask_xlate(struct gpio_regmap *gpio, unsigned int base, + unsigned int offset, unsigned int *reg, + unsigned int *mask) { - return 0; -} - -static int idi_48_gpio_get(struct gpio_chip *chip, unsigned int offset) -{ - struct idi_48_gpio *const idi48gpio = gpiochip_get_data(chip); - void __iomem *const ppi = idi48gpio->reg; + const unsigned int line = offset % 8; + const unsigned int stride = offset / 8; + const unsigned int port = (stride / 3) * 4; + const unsigned int port_stride = stride % 3; - return i8255_get(ppi, offset); -} - -static int idi_48_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask, - unsigned long *bits) -{ - struct idi_48_gpio *const idi48gpio = gpiochip_get_data(chip); - void __iomem *const ppi = idi48gpio->reg; - - i8255_get_multiple(ppi, mask, bits, chip->ngpio); + *reg = base + port + port_stride; + *mask = BIT(line); return 0; } @@ -166,18 +123,14 @@ static const char *idi48_names[IDI48_NGPIO] = { static int idi_48_probe(struct device *dev, unsigned int id) { - struct idi_48_gpio *idi48gpio; const char *const name = dev_name(dev); + struct gpio_regmap_config config = {}; void __iomem *regs; struct regmap *map; struct regmap_irq_chip *chip; struct regmap_irq_chip_data *chip_data; int err; - idi48gpio = devm_kzalloc(dev, sizeof(*idi48gpio), GFP_KERNEL); - if (!idi48gpio) - return -ENOMEM; - if (!devm_request_region(dev, base[id], IDI_48_EXTENT, name)) { dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n", base[id], base[id] + IDI_48_EXTENT); @@ -187,7 +140,6 @@ static int idi_48_probe(struct device *dev, unsigned int id) regs = devm_ioport_map(dev, base[id], IDI_48_EXTENT); if (!regs) return -ENOMEM; - idi48gpio->reg = regs; map = devm_regmap_init_mmio(dev, regs, &idi48_regmap_config); if (IS_ERR(map)) @@ -211,25 +163,16 @@ static int idi_48_probe(struct device *dev, unsigned int id) if (err) return dev_err_probe(dev, err, "IRQ registration failed\n"); - idi48gpio->chip.label = name; - idi48gpio->chip.parent = dev; - idi48gpio->chip.owner = THIS_MODULE; - idi48gpio->chip.base = -1; - idi48gpio->chip.ngpio = IDI48_NGPIO; - idi48gpio->chip.names = idi48_names; - idi48gpio->chip.get_direction = idi_48_gpio_get_direction; - idi48gpio->chip.direction_input = idi_48_gpio_direction_input; - idi48gpio->chip.get = idi_48_gpio_get; - idi48gpio->chip.get_multiple = idi_48_gpio_get_multiple; - - err = devm_gpiochip_add_data(dev, &idi48gpio->chip, idi48gpio); - if (err) { - dev_err(dev, "GPIO registering failed (%d)\n", err); - return err; - } + config.parent = dev; + config.regmap = map; + config.ngpio = IDI48_NGPIO; + config.names = idi48_names; + config.reg_dat_base = GPIO_REGMAP_ADDR(0x0); + config.ngpio_per_reg = 8; + config.reg_mask_xlate = idi_48_reg_mask_xlate; + config.irq_domain = regmap_irq_get_domain(chip_data); - return gpiochip_irqchip_add_domain(&idi48gpio->chip, - regmap_irq_get_domain(chip_data)); + return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(dev, &config)); } static struct isa_driver idi_48_driver = { |