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gpiolib: provide gpio_device_get_label()

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Provide a getter for the GPIO device label string so that users don't
have to dereference struct gpio_chip directly.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Bartosz Golaszewski 2023-11-15 17:49:59 +01:00
parent b85ea95d08
commit d1f7728259
2 changed files with 15 additions and 0 deletions
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14
drivers/gpio/gpiolib.c
View File

@ -254,6 +254,20 @@ int gpio_device_get_base(struct gpio_device *gdev)
} }
EXPORT_SYMBOL_GPL(gpio_device_get_base); EXPORT_SYMBOL_GPL(gpio_device_get_base);
/**
* gpio_device_get_label() - Get the label of this GPIO device
* @gdev: GPIO device
*
* Returns:
* Pointer to the string containing the GPIO device label. The string's
* lifetime is tied to that of the underlying GPIO device.
*/
const char *gpio_device_get_label(struct gpio_device *gdev)
{
return gdev->label;
}
EXPORT_SYMBOL(gpio_device_get_label);
/** /**
* gpio_device_get_chip() - Get the gpio_chip implementation of this GPIO device * gpio_device_get_chip() - Get the gpio_chip implementation of this GPIO device
* @gdev: GPIO device * @gdev: GPIO device

1
include/linux/gpio/driver.h
View File

@ -786,6 +786,7 @@ struct gpio_device *gpiod_to_gpio_device(struct gpio_desc *desc);
/* struct gpio_device getters */ /* struct gpio_device getters */
int gpio_device_get_base(struct gpio_device *gdev); int gpio_device_get_base(struct gpio_device *gdev);
const char *gpio_device_get_label(struct gpio_device *gdev);
#else /* CONFIG_GPIOLIB */ #else /* CONFIG_GPIOLIB */