diff options
| -rw-r--r-- | drivers/gpio/gpiolib.c | 14 | ||||
| -rw-r--r-- | include/linux/gpio/consumer.h | 9 |
2 files changed, 23 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index b8197502a5ac..2e5b6982e76d 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -266,6 +266,20 @@ struct gpio_device *gpiod_to_gpio_device(struct gpio_desc *desc) EXPORT_SYMBOL_GPL(gpiod_to_gpio_device); /** + * gpiod_is_equal() - Check if two GPIO descriptors refer to the same pin. + * @desc: Descriptor to compare. + * @other: The second descriptor to compare against. + * + * Returns: + * True if the descriptors refer to the same physical pin. False otherwise. + */ +bool gpiod_is_equal(struct gpio_desc *desc, struct gpio_desc *other) +{ + return desc == other; +} +EXPORT_SYMBOL_GPL(gpiod_is_equal); + +/** * gpio_device_get_base() - Get the base GPIO number allocated by this device * @gdev: GPIO device * diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index 45b651c05b9c..7355abadaef4 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -180,6 +180,8 @@ struct gpio_desc *devm_fwnode_gpiod_get_index(struct device *dev, enum gpiod_flags flags, const char *label); +bool gpiod_is_equal(struct gpio_desc *desc, struct gpio_desc *other); + #else /* CONFIG_GPIOLIB */ #include <linux/bug.h> @@ -547,6 +549,13 @@ struct gpio_desc *devm_fwnode_gpiod_get_index(struct device *dev, return ERR_PTR(-ENOSYS); } +static inline bool +gpiod_is_equal(struct gpio_desc *desc, struct gpio_desc *other) +{ + WARN_ON(desc || other); + return false; +} + #endif /* CONFIG_GPIOLIB */ #if IS_ENABLED(CONFIG_GPIOLIB) && IS_ENABLED(CONFIG_HTE) |