#include <linux/module.h>
#include <linux/gpio.h>
#include <linux/device.h>
#include <linux/gfp.h>

Functions
int	devm_gpio_request (struct device dev, unsigned gpio, const char label)

	EXPORT_SYMBOL (devm_gpio_request)

int	devm_gpio_request_one (struct device dev, unsigned gpio, unsigned long flags, const char label)

	EXPORT_SYMBOL (devm_gpio_request_one)

void	devm_gpio_free (struct device *dev, unsigned int gpio)

	EXPORT_SYMBOL (devm_gpio_free)

Function Documentation

void devm_gpio_free	(	struct device *	dev,
		unsigned int	gpio
	)

devm_gpio_free - free an interrupt : device to free gpio for : gpio to free

Except for the extra argument, this function takes the same arguments and performs the same function as gpio_free(). This function instead of gpio_free() should be used to manually free GPIOs allocated with devm_gpio_request().

Definition at line 113 of file devres.c.

int devm_gpio_request	(	struct device *	dev,
		unsigned	gpio,
		const char *	label
	)

devm_gpio_request - request a gpio for a managed device : device to request the gpio for : gpio to allocate : the name of the requested gpio

Except for the extra argument, this function takes the same arguments and performs the same function as gpio_request(). GPIOs requested with this function will be automatically freed on driver detach.

If an GPIO allocated with this function needs to be freed separately, devm_gpio_free() must be used.

Definition at line 51 of file devres.c.

int devm_gpio_request_one	(	struct device *	dev,
		unsigned	gpio,
		unsigned long	flags,
		const char *	label
	)

devm_gpio_request_one - request a single GPIO with initial setup : device to request for : the GPIO number : GPIO configuration as specified by GPIOF_* : a literal description string of this GPIO

Definition at line 80 of file devres.c.

EXPORT_SYMBOL ( devm_gpio_request )

EXPORT_SYMBOL ( devm_gpio_request_one )

EXPORT_SYMBOL ( devm_gpio_free )

Functions

Function Documentation