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107 lines
3.0 KiB
Diff
107 lines
3.0 KiB
Diff
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From 177dc53a07e2c660d1c1a6cec4576c802325e330 Mon Sep 17 00:00:00 2001
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From: Gabor Juhos <juhosg@openwrt.org>
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Date: Wed, 14 Nov 2012 09:02:01 +0100
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Subject: [PATCH] MIPS: ath79: fix GPIO function selection for AR934x SoCs
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GPIO function selection is not working on the AR934x
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SoCs because the offset of the function selection
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register is different on those.
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Add a helper routine which returns the correct
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register address based on the SoC type, and use
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that in the 'ath79_gpio_function_*' routines.
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Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
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---
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arch/mips/ath79/gpio.c | 38 ++++++++++++++++--------
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arch/mips/include/asm/mach-ath79/ar71xx_regs.h | 2 ++
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2 files changed, 28 insertions(+), 12 deletions(-)
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--- a/arch/mips/ath79/gpio.c
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+++ b/arch/mips/ath79/gpio.c
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@@ -137,47 +137,61 @@ static struct gpio_chip ath79_gpio_chip
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.base = 0,
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};
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+static void __iomem *ath79_gpio_get_function_reg(void)
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+{
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+ u32 reg = 0;
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+
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+ if (soc_is_ar71xx() ||
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+ soc_is_ar724x() ||
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+ soc_is_ar913x() ||
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+ soc_is_ar933x())
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+ reg = AR71XX_GPIO_REG_FUNC;
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+ else if (soc_is_ar934x())
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+ reg = AR934X_GPIO_REG_FUNC;
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+ else
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+ BUG();
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+
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+ return ath79_gpio_base + reg;
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+}
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+
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void ath79_gpio_function_enable(u32 mask)
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{
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- void __iomem *base = ath79_gpio_base;
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+ void __iomem *reg = ath79_gpio_get_function_reg();
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unsigned long flags;
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spin_lock_irqsave(&ath79_gpio_lock, flags);
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- __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_FUNC) | mask,
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- base + AR71XX_GPIO_REG_FUNC);
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+ __raw_writel(__raw_readl(reg) | mask, reg);
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/* flush write */
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- __raw_readl(base + AR71XX_GPIO_REG_FUNC);
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+ __raw_readl(reg);
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spin_unlock_irqrestore(&ath79_gpio_lock, flags);
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}
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void ath79_gpio_function_disable(u32 mask)
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{
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- void __iomem *base = ath79_gpio_base;
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+ void __iomem *reg = ath79_gpio_get_function_reg();
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unsigned long flags;
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spin_lock_irqsave(&ath79_gpio_lock, flags);
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- __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_FUNC) & ~mask,
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- base + AR71XX_GPIO_REG_FUNC);
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+ __raw_writel(__raw_readl(reg) & ~mask, reg);
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/* flush write */
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- __raw_readl(base + AR71XX_GPIO_REG_FUNC);
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+ __raw_readl(reg);
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spin_unlock_irqrestore(&ath79_gpio_lock, flags);
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}
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void ath79_gpio_function_setup(u32 set, u32 clear)
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{
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- void __iomem *base = ath79_gpio_base;
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+ void __iomem *reg = ath79_gpio_get_function_reg();
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unsigned long flags;
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spin_lock_irqsave(&ath79_gpio_lock, flags);
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- __raw_writel((__raw_readl(base + AR71XX_GPIO_REG_FUNC) & ~clear) | set,
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- base + AR71XX_GPIO_REG_FUNC);
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+ __raw_writel((__raw_readl(reg) & ~clear) | set, reg);
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/* flush write */
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- __raw_readl(base + AR71XX_GPIO_REG_FUNC);
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+ __raw_readl(reg);
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spin_unlock_irqrestore(&ath79_gpio_lock, flags);
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}
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--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
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+++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
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@@ -520,6 +520,8 @@
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#define AR71XX_GPIO_REG_INT_ENABLE 0x24
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#define AR71XX_GPIO_REG_FUNC 0x28
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+#define AR934X_GPIO_REG_FUNC 0x6c
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+
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#define AR71XX_GPIO_COUNT 16
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#define AR7240_GPIO_COUNT 18
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#define AR7241_GPIO_COUNT 20
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