diff options
Diffstat (limited to 'drivers/gpio/gpiolib.c')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 7e297ae35f8c..9febaef6767d 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -221,6 +221,27 @@ struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc) EXPORT_SYMBOL_GPL(gpiod_to_chip); /** + * gpiod_to_gpio_device() - Return the GPIO device to which this descriptor + * belongs. + * @desc: Descriptor for which to return the GPIO device. + * + * This *DOES NOT* increase the reference count of the GPIO device as it's + * expected that the descriptor is requested and the users already holds a + * reference to the device. + * + * Returns: + * Address of the GPIO device owning this descriptor. + */ +struct gpio_device *gpiod_to_gpio_device(struct gpio_desc *desc) +{ + if (!desc) + return NULL; + + return desc->gdev; +} +EXPORT_SYMBOL_GPL(gpiod_to_gpio_device); + +/** * gpio_device_get_chip() - Get the gpio_chip implementation of this GPIO device * @gdev: GPIO device * |