Commit 1559d149 authored by Bartosz Golaszewski's avatar Bartosz Golaszewski
Browse files

gpiolib: provide gpio_device_to_device() 



There are users in the kernel who need to retrieve the address of the
struct device backing the GPIO device. Currently they needlessly poke in
the internals of GPIOLIB. Add a dedicated getter function.

Signed-off-by: default avatarBartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: default avatarPeter Rosin <peda@axentia.se>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 4f3b436e

drivers/gpio/gpiolib.c

+17 −0
Original line number Diff line number Diff line
@@ -1189,6 +1189,23 @@ void gpio_device_put(struct gpio_device *gdev) 
}

EXPORT_SYMBOL_GPL(gpio_device_put);



/**

 * gpio_device_to_device() - Retrieve the address of the underlying struct

 *                           device.

 * @gdev: GPIO device for which to return the address.

 *

 * This does not increase the reference count of the GPIO device nor the

 * underlying struct device.

 *

 * Returns:

 * Address of struct device backing this GPIO device.

 */

struct device *gpio_device_to_device(struct gpio_device *gdev)

{

	return &gdev->dev;

}

EXPORT_SYMBOL_GPL(gpio_device_to_device);



#ifdef CONFIG_GPIOLIB_IRQCHIP



/*

include/linux/gpio/driver.h

+2 −0
Original line number Diff line number Diff line
@@ -619,6 +619,8 @@ void gpio_device_put(struct gpio_device *gdev); 
DEFINE_FREE(gpio_device_put, struct gpio_device *,

	    if (IS_ERR_OR_NULL(_T)) gpio_device_put(_T));



struct device *gpio_device_to_device(struct gpio_device *gdev);



bool gpiochip_line_is_irq(struct gpio_chip *gc, unsigned int offset);

int gpiochip_reqres_irq(struct gpio_chip *gc, unsigned int offset);

void gpiochip_relres_irq(struct gpio_chip *gc, unsigned int offset);