mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-06 02:24:14 +08:00
3d64de9c50
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>
13 lines
315 B
C
13 lines
315 B
C
#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 */
|