gpio: generic: provide to_gpio_generic_chip()

Provide a helper allowing to convert a struct gpio_chip address to the
struct gpio_generic_chip that wraps it.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250825-gpio-mmio-gpio-conv-v1-1-356b4b1d5110@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

diff --git a/include/linux/gpio/generic.h b/include/linux/gpio/generic.h
index f3a8db4598bb59f1dba4fbebace24dc10be44ae4..5a85ecbef8d234d9cf0c2f1db7a97f5f3781b2e4 100644 (file)
--- a/include/linux/gpio/generic.h
+++ b/include/linux/gpio/generic.h
@@ -55,6 +55,12 @@ struct gpio_generic_chip {
        struct gpio_chip gc;
 };
 
+static inline struct gpio_generic_chip *
+to_gpio_generic_chip(struct gpio_chip *gc)
+{
+       return container_of(gc, struct gpio_generic_chip, gc);
+}
+
 /**
  * gpio_generic_chip_init() - Initialize a generic GPIO chip.
  * @chip: Generic GPIO chip to set up.