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authorjuhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73>2011-11-14 17:43:14 +0000
committerjuhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73>2011-11-14 17:43:14 +0000
commit8f09b983e5a9d2d814b21a7f853939b1b07e73d4 (patch)
treeb1242b0349990290db145afaad5ce4ca6055d23d
parent95684215c0a50641b5a799de88b467d933c5c78d (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.c31
-rw-r--r--target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h7
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