linux/arch/arm/include/asm/gpio.h
Rob Herring 01464226ac ARM: make mach/gpio.h headers optional
Most platforms don't need mach/gpio.h and it prevents multi-platform
kernel images. Add CONFIG_NEED_MACH_GPIO_H and make platforns select it
if they need gpio.h. This is platforms that define __GPIOLIB_COMPLEX
or have lots of implicit includes pulled in by mach/gpio.h.

at91 and omap have gpio clean-up pending and can drop
CONFIG_NEED_MACH_GPIO_H once that is in.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-14 09:21:59 -05:00

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C

#ifndef _ARCH_ARM_GPIO_H
#define _ARCH_ARM_GPIO_H
#if CONFIG_ARCH_NR_GPIO > 0
#define ARCH_NR_GPIOS CONFIG_ARCH_NR_GPIO
#endif
/* not all ARM platforms necessarily support this API ... */
#ifdef CONFIG_NEED_MACH_GPIO_H
#include <mach/gpio.h>
#endif
#ifndef __ARM_GPIOLIB_COMPLEX
/* Note: this may rely upon the value of ARCH_NR_GPIOS set in mach/gpio.h */
#include <asm-generic/gpio.h>
/* The trivial gpiolib dispatchers */
#define gpio_get_value __gpio_get_value
#define gpio_set_value __gpio_set_value
#define gpio_cansleep __gpio_cansleep
#endif
/*
* Provide a default gpio_to_irq() which should satisfy every case.
* However, some platforms want to do this differently, so allow them
* to override it.
*/
#ifndef gpio_to_irq
#define gpio_to_irq __gpio_to_irq
#endif
#endif /* _ARCH_ARM_GPIO_H */