diff options
Diffstat (limited to 'target/linux/ar71xx/patches-3.3/212-MIPS-ath79-fix-GPIO-function-selection-for-AR934x-So.patch')
| -rw-r--r-- | target/linux/ar71xx/patches-3.3/212-MIPS-ath79-fix-GPIO-function-selection-for-AR934x-So.patch | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-3.3/212-MIPS-ath79-fix-GPIO-function-selection-for-AR934x-So.patch b/target/linux/ar71xx/patches-3.3/212-MIPS-ath79-fix-GPIO-function-selection-for-AR934x-So.patch new file mode 100644 index 0000000000..9ffb398ea4 --- /dev/null +++ b/target/linux/ar71xx/patches-3.3/212-MIPS-ath79-fix-GPIO-function-selection-for-AR934x-So.patch @@ -0,0 +1,106 @@ +From 177dc53a07e2c660d1c1a6cec4576c802325e330 Mon Sep 17 00:00:00 2001 +From: Gabor Juhos <juhosg@openwrt.org> +Date: Wed, 14 Nov 2012 09:02:01 +0100 +Subject: [PATCH] MIPS: ath79: fix GPIO function selection for AR934x SoCs + +GPIO function selection is not working on the AR934x +SoCs because the offset of the function selection +register is different on those. + +Add a helper routine which returns the correct +register address based on the SoC type, and use +that in the 'ath79_gpio_function_*' routines. + +Signed-off-by: Gabor Juhos <juhosg@openwrt.org> +--- + arch/mips/ath79/gpio.c | 38 ++++++++++++++++-------- + arch/mips/include/asm/mach-ath79/ar71xx_regs.h | 2 ++ + 2 files changed, 28 insertions(+), 12 deletions(-) + +--- a/arch/mips/ath79/gpio.c ++++ b/arch/mips/ath79/gpio.c +@@ -137,47 +137,61 @@ static struct gpio_chip ath79_gpio_chip + .base = 0, + }; + ++static void __iomem *ath79_gpio_get_function_reg(void) ++{ ++ u32 reg = 0; ++ ++ if (soc_is_ar71xx() || ++ soc_is_ar724x() || ++ soc_is_ar913x() || ++ soc_is_ar933x()) ++ reg = AR71XX_GPIO_REG_FUNC; ++ else if (soc_is_ar934x()) ++ reg = AR934X_GPIO_REG_FUNC; ++ else ++ BUG(); ++ ++ return ath79_gpio_base + reg; ++} ++ + void ath79_gpio_function_enable(u32 mask) + { +- void __iomem *base = ath79_gpio_base; ++ void __iomem *reg = ath79_gpio_get_function_reg(); + unsigned long flags; + + spin_lock_irqsave(&ath79_gpio_lock, flags); + +- __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_FUNC) | mask, +- base + AR71XX_GPIO_REG_FUNC); ++ __raw_writel(__raw_readl(reg) | mask, reg); + /* flush write */ +- __raw_readl(base + AR71XX_GPIO_REG_FUNC); ++ __raw_readl(reg); + + spin_unlock_irqrestore(&ath79_gpio_lock, flags); + } + + void ath79_gpio_function_disable(u32 mask) + { +- void __iomem *base = ath79_gpio_base; ++ void __iomem *reg = ath79_gpio_get_function_reg(); + unsigned long flags; + + spin_lock_irqsave(&ath79_gpio_lock, flags); + +- __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_FUNC) & ~mask, +- base + AR71XX_GPIO_REG_FUNC); ++ __raw_writel(__raw_readl(reg) & ~mask, reg); + /* flush write */ +- __raw_readl(base + AR71XX_GPIO_REG_FUNC); ++ __raw_readl(reg); + + spin_unlock_irqrestore(&ath79_gpio_lock, flags); + } + + void ath79_gpio_function_setup(u32 set, u32 clear) + { +- void __iomem *base = ath79_gpio_base; ++ void __iomem *reg = ath79_gpio_get_function_reg(); + unsigned long flags; + + spin_lock_irqsave(&ath79_gpio_lock, flags); + +- __raw_writel((__raw_readl(base + AR71XX_GPIO_REG_FUNC) & ~clear) | set, +- base + AR71XX_GPIO_REG_FUNC); ++ __raw_writel((__raw_readl(reg) & ~clear) | set, reg); + /* flush write */ +- __raw_readl(base + AR71XX_GPIO_REG_FUNC); ++ __raw_readl(reg); + + spin_unlock_irqrestore(&ath79_gpio_lock, flags); + } +--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h ++++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h +@@ -520,6 +520,8 @@ + #define AR71XX_GPIO_REG_INT_ENABLE 0x24 + #define AR71XX_GPIO_REG_FUNC 0x28 + ++#define AR934X_GPIO_REG_FUNC 0x6c ++ + #define AR71XX_GPIO_COUNT 16 + #define AR724X_GPIO_COUNT 18 + #define AR913X_GPIO_COUNT 22 |