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Commit 3038bbdf authored by Jamie Iles's avatar Jamie Iles Committed by Grant Likely
Browse files

of/gpio: export of_gpio_simple_xlate 



Allow GPIO drivers to use of_gpio_simple_xlate.  This is useful for the
generic GPIO driver for example where gpio_chip is embedded in
bgpio_chip and doesn't need of_mm_gpio_chip but has a simple 1:1 GPIO
mapping.

Cc: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: default avatarJamie Iles <jamie@jamieiles.com>
Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
parent 95b68865

drivers/of/gpio.c

+3 −2
Original line number Diff line number Diff line
@@ -127,7 +127,7 @@ EXPORT_SYMBOL(of_gpio_count); 
 * gpio chips. This function performs only one sanity check: whether gpio

 * is less than ngpios (that is specified in the gpio_chip).

 */

static int of_gpio_simple_xlate(struct gpio_chip *gc, struct device_node *np,

int of_gpio_simple_xlate(struct gpio_chip *gc, struct device_node *np,

			 const void *gpio_spec, u32 *flags)

{

	const __be32 *gpio = gpio_spec;
@@ -152,6 +152,7 @@ static int of_gpio_simple_xlate(struct gpio_chip *gc, struct device_node *np, 


	return n;

}

EXPORT_SYMBOL(of_gpio_simple_xlate);



/**

 * of_mm_gpiochip_add - Add memory mapped GPIO chip (bank)

include/linux/of_gpio.h

+9 −0
Original line number Diff line number Diff line
@@ -57,6 +57,8 @@ extern int of_mm_gpiochip_add(struct device_node *np, 
extern void of_gpiochip_add(struct gpio_chip *gc);

extern void of_gpiochip_remove(struct gpio_chip *gc);

extern struct gpio_chip *of_node_to_gpiochip(struct device_node *np);

extern int of_gpio_simple_xlate(struct gpio_chip *gc, struct device_node *np,

				const void *gpio_spec, u32 *flags);



#else /* CONFIG_OF_GPIO */
@@ -72,6 +74,13 @@ static inline unsigned int of_gpio_count(struct device_node *np) 
	return 0;

}



static inline int of_gpio_simple_xlate(struct gpio_chip *gc,

				       struct device_node *np,

				       const void *gpio_spec, u32 *flags)

{

	return -ENOSYS;

}



static inline void of_gpiochip_add(struct gpio_chip *gc) { }

static inline void of_gpiochip_remove(struct gpio_chip *gc) { }