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| author |   Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2023-09-27 16:29:25 +0200 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2023-10-04 13:29:56 +0200 |
| commit | 93548f8bbbbf5b62dbd37c8f61a037a06666787b (patch) | |
| tree | c34338852cee00c40de2e10d8d1d41d306de374f /include/linux/gpio | |
| parent | gpiolib: provide gpio_device_find_by_label() (diff) | |
| download | wireguard-linux-93548f8bbbbf5b62dbd37c8f61a037a06666787b.tar.xz wireguard-linux-93548f8bbbbf5b62dbd37c8f61a037a06666787b.zip | |
gpiolib: provide gpio_device_get_desc()
Getting the GPIO descriptor directly from the gpio_chip struct is
dangerous as we don't take the reference to the underlying GPIO device.
In order to start working towards removing gpiochip_get_desc(), let's
provide a safer variant that works with an existing reference to struct
gpio_device.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'include/linux/gpio')
| -rw-r--r-- | include/linux/gpio/driver.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 24996cba6465..3fdf3f14bb13 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -770,6 +770,8 @@ struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *gc, void gpiochip_free_own_desc(struct gpio_desc *desc); struct gpio_desc *gpiochip_get_desc(struct gpio_chip *gc, unsigned int hwnum); +struct gpio_desc * +gpio_device_get_desc(struct gpio_device *gdev, unsigned int hwnum); #ifdef CONFIG_GPIOLIB |