From 3d64de9c50619d32eb71d993d23a50b98d12d3c0 Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Thu, 18 Dec 2008 19:37:26 +0300 Subject: 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 Signed-off-by: Kumar Gala --- arch/powerpc/sysdev/simple_gpio.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 arch/powerpc/sysdev/simple_gpio.h (limited to 'arch/powerpc/sysdev/simple_gpio.h') diff --git a/arch/powerpc/sysdev/simple_gpio.h b/arch/powerpc/sysdev/simple_gpio.h new file mode 100644 index 0000000..3a7b0c5 --- /dev/null +++ b/arch/powerpc/sysdev/simple_gpio.h @@ -0,0 +1,12 @@ +#ifndef __SYSDEV_SIMPLE_GPIO_H +#define __SYSDEV_SIMPLE_GPIO_H + +#include + +#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 */ -- cgit v1.1