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Commit c771c2f4 authored by Jonas Gorski's avatar Jonas Gorski Committed by Linus Walleij
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gpiolib: provide generic request/free implementations 



Provide generic request/free implementations that pinctrl aware gpio
drivers can use instead of open coding if they use a 1:1 pin to gpio
signal mapping.

Signed-off-by: default avatarJonas Gorski <jogo@openwrt.org>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 30cefeac

drivers/gpio/gpiolib.c

+23 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
#include <linux/acpi.h>

#include <linux/gpio/driver.h>

#include <linux/gpio/machine.h>

#include <linux/pinctrl/consumer.h>



#include "gpiolib.h"
@@ -745,6 +746,28 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip) {} 


#endif /* CONFIG_GPIOLIB_IRQCHIP */



/**

 * gpiochip_generic_request() - request the gpio function for a pin

 * @chip: the gpiochip owning the GPIO

 * @offset: the offset of the GPIO to request for GPIO function

 */

int gpiochip_generic_request(struct gpio_chip *chip, unsigned offset)

{

	return pinctrl_request_gpio(chip->base + offset);

}

EXPORT_SYMBOL_GPL(gpiochip_generic_request);



/**

 * gpiochip_generic_free() - free the gpio function from a pin

 * @chip: the gpiochip to request the gpio function for

 * @offset: the offset of the GPIO to free from GPIO function

 */

void gpiochip_generic_free(struct gpio_chip *chip, unsigned offset)

{

	pinctrl_free_gpio(chip->base + offset);

}

EXPORT_SYMBOL_GPL(gpiochip_generic_free);



#ifdef CONFIG_PINCTRL



/**

include/linux/gpio/driver.h

+3 −0
Original line number Diff line number Diff line
@@ -206,6 +206,9 @@ int _gpiochip_irqchip_add(struct gpio_chip *gpiochip, 


#endif /* CONFIG_GPIOLIB_IRQCHIP */



int gpiochip_generic_request(struct gpio_chip *chip, unsigned offset);

void gpiochip_generic_free(struct gpio_chip *chip, unsigned offset);



#ifdef CONFIG_PINCTRL



/**