gpiolib: provide gpiod_to_gpio_device()

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Accessing struct gpio_chip backing a GPIO device is only allowed for the
actual providers of that chip.

Similarly to how we introduced gpio_device_find() in order to replace
the abused gpiochip_find(), let's introduce a counterpart to
gpiod_to_chip() that returns a reference to the GPIO device owning the
descriptor. This is done in order to later remove gpiod_to_chip()
entirely.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Peter Rosin <peda@axentia.se>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

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This commit is contained in:

Bartosz Golaszewski 2023-10-11 15:02:03 +02:00

parent 1559d14977

commit 370232d096

2 changed files with 22 additions and 0 deletions

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21

drivers/gpio/gpiolib.c

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1

include/linux/gpio/driver.h

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