diff options
| author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2012-06-25 10:41:09 (GMT) |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2012-06-30 13:03:16 (GMT) |
| commit | 4f3d7f65e9d541566c87de2af2d3b066bae78116 (patch) | |
| tree | 8e85740b7fbe7a3bbdfbbc9946e95b1c284d3bfc | |
| parent | 485802a6c524e62b5924849dd727ddbb1497cc71 (diff) | |
| download | linux-4f3d7f65e9d541566c87de2af2d3b066bae78116.tar.xz | |
ARM: shmobile: add common extra gpio functions
Current gpio frame work doesn't have the method to control
just pull up/down/free, but some SH-ARM boards need such kind of operation.
This patch adds common extra gpio functions for SH-ARM.
But these functions should be replaced by correct
gpio function in the future.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| -rw-r--r-- | arch/arm/mach-shmobile/include/mach/gpio.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/include/mach/gpio.h b/arch/arm/mach-shmobile/include/mach/gpio.h index de795b4..844507d 100644 --- a/arch/arm/mach-shmobile/include/mach/gpio.h +++ b/arch/arm/mach-shmobile/include/mach/gpio.h @@ -13,6 +13,7 @@ #include <linux/kernel.h> #include <linux/errno.h> #include <linux/sh_pfc.h> +#include <linux/io.h> #ifdef CONFIG_GPIOLIB @@ -27,4 +28,35 @@ static inline int irq_to_gpio(unsigned int irq) #endif /* CONFIG_GPIOLIB */ +/* + * FIXME !! + * + * current gpio frame work doesn't have + * the method to control only pull up/down/free. + * this function should be replaced by correct gpio function + */ +static inline void __init gpio_direction_none(u32 addr) +{ + __raw_writeb(0x00, addr); +} + +static inline void __init gpio_request_pullup(u32 addr) +{ + u8 data = __raw_readb(addr); + + data &= 0x0F; + data |= 0xC0; + __raw_writeb(data, addr); +} + +static inline void __init gpio_request_pulldown(u32 addr) +{ + u8 data = __raw_readb(addr); + + data &= 0x0F; + data |= 0xA0; + + __raw_writeb(data, addr); +} + #endif /* __ASM_ARCH_GPIO_H */ |