Commit 8c85a102 authored by Bartosz Golaszewski's avatar Bartosz Golaszewski
Browse files

gpiolib: provide gpio_device_get_base() 



Let's start adding getters for the opaque struct gpio_device. Start with
a function allowing to retrieve the base GPIO number.

Signed-off-by: default avatarBartosz Golaszewski <bartosz.golaszewski@linaro.org>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 9acdf620

drivers/gpio/gpiolib.c

+13 −0
Original line number Diff line number Diff line
@@ -241,6 +241,19 @@ struct gpio_device *gpiod_to_gpio_device(struct gpio_desc *desc) 
}

EXPORT_SYMBOL_GPL(gpiod_to_gpio_device);



/**

 * gpio_device_get_base() - Get the base GPIO number allocated by this device

 * @gdev: GPIO device

 *

 * Returns:

 * First GPIO number in the global GPIO numberspace for this device.

 */

int gpio_device_get_base(struct gpio_device *gdev)

{

	return gdev->base;

}

EXPORT_SYMBOL_GPL(gpio_device_get_base);



/**

 * gpio_device_get_chip() - Get the gpio_chip implementation of this GPIO device

 * @gdev: GPIO device

include/linux/gpio/driver.h

+3 −0
Original line number Diff line number Diff line
@@ -787,6 +787,9 @@ void gpiochip_unlock_as_irq(struct gpio_chip *gc, unsigned int offset); 
struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc);

struct gpio_device *gpiod_to_gpio_device(struct gpio_desc *desc);



/* struct gpio_device getters */

int gpio_device_get_base(struct gpio_device *gdev);



#else /* CONFIG_GPIOLIB */



#include <linux/err.h>