linux-sg2042/arch/arm/include/asm/gpio.h

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#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 ... */
#include <mach/gpio.h>
#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 */