linux-stable/arch/powerpc/sysdev/simple_gpio.h

#ifndef __SYSDEV_SIMPLE_GPIO_H
#define __SYSDEV_SIMPLE_GPIO_H

#include <linux/errno.h>

#ifdef CONFIG_SIMPLE_GPIO
extern void simple_gpiochip_init(const char *compatible);
#else
static inline void simple_gpiochip_init(const char *compatible) {}
#endif /* CONFIG_SIMPLE_GPIO */

#endif /* __SYSDEV_SIMPLE_GPIO_H */
powerpc: Implement GPIO driver for simple memory-mapped banks The driver supports very simple GPIO controllers, that is, when a controller provides just a 'data' register. Such controllers may be found in various BCSRs (Board's FPGAs used to control board's switches, LEDs, chip-selects, Ethernet/USB PHY power, etc). So far we support only 1-byte GPIO banks. Support for other widths may be implemented when/if needed. p.s. To avoid "made up" compatible entries (like compatible = "simple-gpio"), boards must call simple_gpiochip_init() to pass the compatible string. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> 2008-12-18 16:37:26 +00:00			`#ifndef __SYSDEV_SIMPLE_GPIO_H`
			`#define __SYSDEV_SIMPLE_GPIO_H`

			`#include <linux/errno.h>`

			`#ifdef CONFIG_SIMPLE_GPIO`
			`extern void simple_gpiochip_init(const char *compatible);`
			`#else`
			`static inline void simple_gpiochip_init(const char *compatible) {}`
			`#endif /* CONFIG_SIMPLE_GPIO */`

			`#endif /* __SYSDEV_SIMPLE_GPIO_H */`