One of the ways of looking up GPIO devices is using their fwnode. Provide a helper for that to avoid every user implementing their own matching function. Reviewed-by: Dipen Patel <dipenp@xxxxxxxxxx> Tested-by: Dipen Patel <dipenp@xxxxxxxxxx> Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Link: https://lore.kernel.org/r/20231010151709.4104747-2-andriy.shevchenko@xxxxxxxxxxxxxxx Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> --- drivers/gpio/gpiolib.c | 20 ++++++++++++++++++++ include/linux/gpio/driver.h | 1 + 2 files changed, 21 insertions(+) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 7b4d12b714a3..31c06a32cb8a 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1142,6 +1142,26 @@ struct gpio_device *gpio_device_find_by_label(const char *label) } EXPORT_SYMBOL_GPL(gpio_device_find_by_label); +static int gpio_chip_match_by_fwnode(struct gpio_chip *gc, void *fwnode) +{ + return device_match_fwnode(&gc->gpiodev->dev, fwnode); +} + +/** + * gpio_device_find_by_fwnode() - wrapper around gpio_device_find() finding + * the GPIO device by its fwnode + * @fwnode: Firmware node to lookup + * + * Returns: + * Reference to the GPIO device or NULL. Reference must be released with + * gpio_device_put(). + */ +struct gpio_device *gpio_device_find_by_fwnode(const struct fwnode_handle *fwnode) +{ + return gpio_device_find((void *)fwnode, gpio_chip_match_by_fwnode); +} +EXPORT_SYMBOL_GPL(gpio_device_find_by_fwnode); + /** * gpio_device_get() - Increase the reference count of this GPIO device * @gdev: GPIO device to increase the refcount for diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index f8ad7f40100c..ae4162d3f1d3 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -611,6 +611,7 @@ struct gpio_chip *gpiochip_find(void *data, struct gpio_device *gpio_device_find(void *data, int (*match)(struct gpio_chip *gc, void *data)); struct gpio_device *gpio_device_find_by_label(const char *label); +struct gpio_device *gpio_device_find_by_fwnode(const struct fwnode_handle *fwnode); struct gpio_device *gpio_device_get(struct gpio_device *gdev); void gpio_device_put(struct gpio_device *gdev); -- 2.40.0.1.gaa8946217a0b
