diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2023-10-11 23:26:35 +0300 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2023-10-12 10:36:39 +0200 |
| commit | 668706b10c9b8181a53bd8881a77bb81b328ab33 (patch) | |
| tree | 07c868c55efa727c4cbb51ca6187aa5e7af0d7a7 /drivers/gpio | |
| parent | 74975b4f2836e3cc10eeb6c38a6da54311e1de5b (diff) | |
| download | linux-668706b10c9b8181a53bd8881a77bb81b328ab33.tar.gz | |
gpiolib: provide gpio_device_find_by_fwnode()
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@nvidia.com>
Tested-by: Dipen Patel <dipenp@nvidia.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20231010151709.4104747-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 191f9c87b4d0b1..dd18dd56c33c8d 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1145,6 +1145,26 @@ 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 |