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Commit 3c729f1e authored by David Brownell's avatar David Brownell Committed by Linus Torvalds
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[PATCH] OMAP GPIO wrappers 



This teaches OMAP how to implement the cross-platform GPIO interfaces.

[akpm@osdl.org: cleanups]
Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 4c20386c

include/asm-arm/arch-omap/gpio.h

+66 −0
Original line number Diff line number Diff line
@@ -76,4 +76,70 @@ extern void omap_set_gpio_direction(int gpio, int is_input); 
extern void omap_set_gpio_dataout(int gpio, int enable);

extern int omap_get_gpio_datain(int gpio);



/*-------------------------------------------------------------------------*/



/* wrappers for "new style" GPIO calls. the old OMAP-specfic ones should

 * eventually be removed (along with this errno.h inclusion), and maybe

 * gpios should put MPUIOs last too.

 */



#include <asm/errno.h>



static inline int gpio_request(unsigned gpio, const char *label)

{

	return omap_request_gpio(gpio);

}



static inline void gpio_free(unsigned gpio)

{

	omap_free_gpio(gpio);

}



static inline int __gpio_set_direction(unsigned gpio, int is_input)

{

	if (cpu_class_is_omap2()) {

		if (gpio > OMAP_MAX_GPIO_LINES)

			return -EINVAL;

	} else {

		if (gpio > (OMAP_MAX_GPIO_LINES + 16 /* MPUIO */))

			return -EINVAL;

	}

	omap_set_gpio_direction(gpio, is_input);

	return 0;

}



static inline int gpio_direction_input(unsigned gpio)

{

	return __gpio_set_direction(gpio, 1);

}



static inline int gpio_direction_output(unsigned gpio)

{

	return __gpio_set_direction(gpio, 0);

}



static inline int gpio_get_value(unsigned gpio)

{

	return omap_get_gpio_datain(gpio);

}



static inline void gpio_set_value(unsigned gpio, int value)

{

	omap_set_gpio_dataout(gpio, value);

}



#include <asm-generic/gpio.h>		/* cansleep wrappers */



static inline int gpio_to_irq(unsigned gpio)

{

	return OMAP_GPIO_IRQ(gpio);

}



static inline int irq_to_gpio(unsigned irq)

{

	if (cpu_class_is_omap1() && (irq < (IH_MPUIO_BASE + 16)))

		return (irq - IH_MPUIO_BASE) + OMAP_MAX_GPIO_LINES;

	return irq - IH_GPIO_BASE;

}



#endif