diff options
Diffstat (limited to 'drivers/gpio/gpiolib.c')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 85 |
1 files changed, 44 insertions, 41 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 939c776b9488..19bd23044b01 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1,34 +1,35 @@ // SPDX-License-Identifier: GPL-2.0 +#include <linux/acpi.h> #include <linux/bitmap.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/spinlock.h> -#include <linux/list.h> +#include <linux/compat.h> +#include <linux/debugfs.h> #include <linux/device.h> #include <linux/err.h> -#include <linux/debugfs.h> -#include <linux/seq_file.h> +#include <linux/file.h> +#include <linux/fs.h> #include <linux/gpio.h> -#include <linux/idr.h> -#include <linux/slab.h> -#include <linux/acpi.h> #include <linux/gpio/driver.h> #include <linux/gpio/machine.h> +#include <linux/idr.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/module.h> #include <linux/pinctrl/consumer.h> -#include <linux/fs.h> -#include <linux/compat.h> -#include <linux/file.h> +#include <linux/seq_file.h> +#include <linux/slab.h> +#include <linux/spinlock.h> + #include <uapi/linux/gpio.h> -#include "gpiolib.h" -#include "gpiolib-of.h" #include "gpiolib-acpi.h" -#include "gpiolib-swnode.h" #include "gpiolib-cdev.h" +#include "gpiolib-of.h" +#include "gpiolib-swnode.h" #include "gpiolib-sysfs.h" +#include "gpiolib.h" #define CREATE_TRACE_POINTS #include <trace/events/gpio.h> @@ -531,6 +532,14 @@ static void gpiochip_free_valid_mask(struct gpio_chip *gc) static int gpiochip_add_pin_ranges(struct gpio_chip *gc) { + /* + * Device Tree platforms are supposed to use "gpio-ranges" + * property. This check ensures that the ->add_pin_ranges() + * won't be called for them. + */ + if (device_property_present(&gc->gpiodev->dev, "gpio-ranges")) + return 0; + if (gc->add_pin_ranges) return gc->add_pin_ranges(gc); @@ -578,6 +587,13 @@ static int gpiochip_setup_dev(struct gpio_device *gdev) { int ret; + /* + * If fwnode doesn't belong to another device, it's safe to clear its + * initialized flag. + */ + if (gdev->dev.fwnode && !gdev->dev.fwnode->dev) + fwnode_dev_initialized(gdev->dev.fwnode, false); + ret = gcdev_register(gdev, gpio_devt); if (ret) return ret; @@ -659,10 +675,12 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data, int base = 0; int ret = 0; + /* If the calling driver did not initialize firmware node, do it here */ if (gc->fwnode) fwnode = gc->fwnode; else if (gc->parent) fwnode = dev_fwnode(gc->parent); + gc->fwnode = fwnode; /* * First: allocate and populate the internal stat container, and @@ -676,14 +694,7 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data, gdev->chip = gc; gc->gpiodev = gdev; - of_gpio_dev_init(gc, gdev); - acpi_gpio_dev_init(gc, gdev); - - /* - * Assign fwnode depending on the result of the previous calls, - * if none of them succeed, assign it to the parent's one. - */ - gc->fwnode = gdev->dev.fwnode = dev_fwnode(&gdev->dev) ?: fwnode; + device_set_node(&gdev->dev, gc->fwnode); gdev->id = ida_alloc(&gpio_ida, GFP_KERNEL); if (gdev->id < 0) { @@ -882,7 +893,7 @@ err_free_gpiochip_mask: gpiochip_free_valid_mask(gc); if (gdev->dev.release) { /* release() has been registered by gpiochip_setup_dev() */ - put_device(&gdev->dev); + gpio_device_put(gdev); goto err_print_message; } err_remove_from_list: @@ -972,7 +983,7 @@ void gpiochip_remove(struct gpio_chip *gc) */ gcdev_unregister(gdev); up_write(&gdev->sem); - put_device(&gdev->dev); + gpio_device_put(gdev); } EXPORT_SYMBOL_GPL(gpiochip_remove); @@ -1126,14 +1137,8 @@ static void gpiochip_set_hierarchical_irqchip(struct gpio_chip *gc, /* Just pick something */ fwspec.param[1] = IRQ_TYPE_EDGE_RISING; fwspec.param_count = 2; - ret = __irq_domain_alloc_irqs(gc->irq.domain, - /* just pick something */ - -1, - 1, - NUMA_NO_NODE, - &fwspec, - false, - NULL); + ret = irq_domain_alloc_irqs(gc->irq.domain, 1, + NUMA_NO_NODE, &fwspec); if (ret < 0) { chip_err(gc, "can not allocate irq for GPIO line %d parent hwirq %d in hierarchy domain: %d\n", @@ -2063,17 +2068,15 @@ static int validate_desc(const struct gpio_desc *desc, const char *func) int gpiod_request(struct gpio_desc *desc, const char *label) { int ret = -EPROBE_DEFER; - struct gpio_device *gdev; VALIDATE_DESC(desc); - gdev = desc->gdev; - if (try_module_get(gdev->owner)) { + if (try_module_get(desc->gdev->owner)) { ret = gpiod_request_commit(desc, label); if (ret) - module_put(gdev->owner); + module_put(desc->gdev->owner); else - get_device(&gdev->dev); + gpio_device_get(desc->gdev); } if (ret) @@ -2134,7 +2137,7 @@ void gpiod_free(struct gpio_desc *desc) { if (desc && desc->gdev && gpiod_free_commit(desc)) { module_put(desc->gdev->owner); - put_device(&desc->gdev->dev); + gpio_device_put(desc->gdev); } else { WARN_ON(extra_checks); } |