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92 lines
2.5 KiB
92 lines
2.5 KiB
--- /dev/null
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+++ b/arch/mips/ath79/gpio.c
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@@ -0,0 +1,59 @@
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+/*
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+ * Atheros AR71XX/AR724X/AR913X GPIO API support
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+ *
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+ * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
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+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
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+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
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+ *
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+ * Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License version 2 as published
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+ * by the Free Software Foundation.
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+ */
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+#include <linux/kernel.h>
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+#include <linux/module.h>
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+#include <linux/io.h>
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+#include <linux/gpio.h>
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+#include <asm/mach-ath79/ar71xx_regs.h>
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+#include <asm/mach-ath79/ath79.h>
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+#include "common.h"
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+
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+void __iomem *ath79_gpio_base;
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+EXPORT_SYMBOL_GPL(ath79_gpio_base);
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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_setup(u32 set, u32 clear)
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+{
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+ void __iomem *reg = ath79_gpio_get_function_reg();
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+
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+ __raw_writel((__raw_readl(reg) & ~clear) | set, reg);
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+ /* flush write */
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+ __raw_readl(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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+ ath79_gpio_function_setup(mask, 0);
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+}
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+
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+void ath79_gpio_function_disable(u32 mask)
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+{
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+ ath79_gpio_function_setup(0, mask);
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+}
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--- a/arch/mips/include/asm/mach-ath79/ath79.h
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+++ b/arch/mips/include/asm/mach-ath79/ath79.h
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@@ -118,6 +118,7 @@ static inline int soc_is_qca955x(void)
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void ath79_ddr_wb_flush(unsigned int reg);
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void ath79_ddr_set_pci_windows(void);
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+extern void __iomem *ath79_gpio_base;
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extern void __iomem *ath79_pll_base;
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extern void __iomem *ath79_reset_base;
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--- a/arch/mips/ath79/dev-common.c
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+++ b/arch/mips/ath79/dev-common.c
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@@ -156,4 +156,5 @@ void __init ath79_gpio_init(void)
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}
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platform_device_register(&ath79_gpio_device);
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+ ath79_gpio_base = ioremap(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE);
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}
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--- a/arch/mips/ath79/common.h
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+++ b/arch/mips/ath79/common.h
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@@ -24,6 +24,9 @@ unsigned long ath79_get_sys_clk_rate(con
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void ath79_ddr_ctrl_init(void);
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+void ath79_gpio_function_enable(u32 mask);
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+void ath79_gpio_function_disable(u32 mask);
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+void ath79_gpio_function_setup(u32 set, u32 clear);
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void ath79_gpio_init(void);
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#endif /* __ATH79_COMMON_H */
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