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gpiolib: Provide to_gpio_device() helper

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Provide to_gpio_device() helper which can be utilized in the existing
and future code.

While at it, make sure it becomes no-op at compilation time.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Andy Shevchenko 2022-11-28 21:00:54 +02:00 committed by Bartosz Golaszewski
parent 4ef339bc05
commit 3b7c7478ed
2 changed files with 8 additions and 3 deletions
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2
drivers/gpio/gpiolib.c
View File

@ -549,7 +549,7 @@ EXPORT_SYMBOL_GPL(gpiochip_line_is_valid);
static void gpiodevice_release(struct device *dev)
{
struct gpio_device *gdev = container_of(dev, struct gpio_device, dev);
struct gpio_device *gdev = to_gpio_device(dev);
unsigned long flags;
spin_lock_irqsave(&gpio_lock, flags);

9
drivers/gpio/gpiolib.h
View File

@ -20,9 +20,9 @@
/**
* struct gpio_device - internal state container for GPIO devices
* @id: numerical ID number for the GPIO chip
* @dev: the GPIO device struct
* @chrdev: character device for the GPIO device
* @id: numerical ID number for the GPIO chip
* @mockdev: class device used by the deprecated sysfs interface (may be
* NULL)
* @owner: helps prevent removal of modules exporting active GPIOs
@ -47,9 +47,9 @@
* userspace.
*/
struct gpio_device {
int id;
struct device dev;
struct cdev chrdev;
int id;
struct device *mockdev;
struct module *owner;
struct gpio_chip *chip;
@ -72,6 +72,11 @@ struct gpio_device {
#endif
};
static inline struct gpio_device *to_gpio_device(struct device *dev)
{
return container_of(dev, struct gpio_device, dev);
}
/* gpio suffixes used for ACPI and device tree lookup */
static __maybe_unused const char * const gpio_suffixes[] = { "gpios", "gpio" };