diff options
| author | juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2011-11-14 17:43:14 +0000 |
|---|---|---|
| committer | juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2011-11-14 17:43:14 +0000 |
| commit | 8f09b983e5a9d2d814b21a7f853939b1b07e73d4 (patch) | |
| tree | b1242b0349990290db145afaad5ce4ca6055d23d | |
| parent | 95684215c0a50641b5a799de88b467d933c5c78d (diff) | |
ar71xx: add a function for selecting output signal on a given GPIO pin
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29125 3c298f89-4303-0410-b956-a3cf2f4a3e73
| -rw-r--r-- | target/linux/ar71xx/files/arch/mips/ar71xx/gpio.c | 31 | ||||
| -rw-r--r-- | target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h | 7 |
2 files changed, 38 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/gpio.c b/target/linux/ar71xx/files/arch/mips/ar71xx/gpio.c index 2ab5dbcf1..517a136a4 100644 --- a/target/linux/ar71xx/files/arch/mips/ar71xx/gpio.c +++ b/target/linux/ar71xx/files/arch/mips/ar71xx/gpio.c @@ -207,6 +207,37 @@ void ar71xx_gpio_function_setup(u32 set, u32 clear) } EXPORT_SYMBOL(ar71xx_gpio_function_setup); +void __init ar71xx_gpio_output_select(unsigned gpio, u8 val) +{ + void __iomem *base = ar71xx_gpio_base; + unsigned long flags; + unsigned int reg; + u32 t, s; + + if (ar71xx_soc != AR71XX_SOC_AR9341 && + ar71xx_soc != AR71XX_SOC_AR9342 && + ar71xx_soc != AR71XX_SOC_AR9344) + return; + + if (gpio >= AR934X_GPIO_COUNT) + return; + + reg = AR934X_GPIO_REG_OUT_FUNC0 + 4 * (gpio / 4); + s = 8 * (gpio % 4); + + spin_lock_irqsave(&ar71xx_gpio_lock, flags); + + t = __raw_readl(base + reg); + t &= ~(0xff << s); + t |= val << s; + __raw_writel(t, base + reg); + + /* flush write */ + (void) __raw_readl(base + reg); + + spin_unlock_irqrestore(&ar71xx_gpio_lock, flags); +} + void __init ar71xx_gpio_init(void) { int err; diff --git a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h index 46057b337..1f7f9eaf6 100644 --- a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h +++ b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h @@ -430,6 +430,12 @@ static inline u32 ar71xx_usb_ctrl_rr(unsigned reg) #define AR71XX_GPIO_REG_INT_ENABLE 0x24 #define AR71XX_GPIO_REG_FUNC 0x28 +#define AR934X_GPIO_REG_OUT_FUNC0 0x2c +#define AR934X_GPIO_REG_OUT_FUNC1 0x30 +#define AR934X_GPIO_REG_OUT_FUNC2 0x34 +#define AR934X_GPIO_REG_OUT_FUNC3 0x38 +#define AR934X_GPIO_REG_OUT_FUNC4 0x3c +#define AR934X_GPIO_REG_OUT_FUNC5 0x40 #define AR934X_GPIO_REG_FUNC 0x6c #define AR71XX_GPIO_FUNC_STEREO_EN BIT(17) @@ -499,6 +505,7 @@ void ar71xx_gpio_init(void) __init; void ar71xx_gpio_function_enable(u32 mask); void ar71xx_gpio_function_disable(u32 mask); void ar71xx_gpio_function_setup(u32 set, u32 clear); +void ar71xx_gpio_output_select(unsigned gpio, u8 val); /* * DDR_CTRL block |