From f687a54af5a8c76309c43f148e8952d13e005c50 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <florian@openwrt.org>
Date: Tue, 29 May 2007 11:15:17 +0000
Subject: [PATCH] Restore the gpio.h file, platform.c uses the generic GPIO API

SVN-Revision: 7380
---
 .../ar7-2.6/files/arch/mips/ar7/platform.c    |   2 +-
 .../ar7-2.6/files/include/asm-mips/ar7/gpio.h | 116 ++++++++++++++++++
 2 files changed, 117 insertions(+), 1 deletion(-)
 create mode 100644 target/linux/ar7-2.6/files/include/asm-mips/ar7/gpio.h

diff --git a/target/linux/ar7-2.6/files/arch/mips/ar7/platform.c b/target/linux/ar7-2.6/files/arch/mips/ar7/platform.c
index c61e20a6c1..cbd61f44aa 100644
--- a/target/linux/ar7-2.6/files/arch/mips/ar7/platform.c
+++ b/target/linux/ar7-2.6/files/arch/mips/ar7/platform.c
@@ -31,7 +31,7 @@
 #include <asm/addrspace.h>
 #include <asm/io.h>
 #include <asm/ar7/ar7.h>
-#include <asm/ar7/gpio.h>
+#include <asm/gpio.h>
 #include <asm/ar7/vlynq.h>
 
 struct plat_vlynq_data {
diff --git a/target/linux/ar7-2.6/files/include/asm-mips/ar7/gpio.h b/target/linux/ar7-2.6/files/include/asm-mips/ar7/gpio.h
new file mode 100644
index 0000000000..1cb11a377b
--- /dev/null
+++ b/target/linux/ar7-2.6/files/include/asm-mips/ar7/gpio.h
@@ -0,0 +1,116 @@
+/*
+ * $Id: gpio.h 6693 2007-03-25 05:42:16Z ejka $
+ * 
+ * Copyright (C) 2007 OpenWrt.org
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef __AR7_GPIO_H__
+#define __AR7_GPIO_H__
+#include <asm/ar7/ar7.h>
+
+#define AR7_GPIO_MAX 32
+
+extern int gpio_request(unsigned gpio, char *label);
+extern void gpio_free(unsigned gpio);
+
+/* Common GPIO layer */
+static inline int gpio_direction_input(unsigned gpio)
+{
+	void __iomem *gpio_dir = (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
+
+	if (gpio >= AR7_GPIO_MAX)
+		return -EINVAL;
+
+	writel(readl(gpio_dir) | (1 << gpio), gpio_dir);
+
+	return 0;
+}
+
+static inline int gpio_direction_output(unsigned gpio)
+{
+	void __iomem *gpio_dir = (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
+
+	if (gpio >= AR7_GPIO_MAX)
+		return -EINVAL;
+
+	writel(readl(gpio_dir) & ~(1 << gpio), gpio_dir);
+
+	return 0;
+}
+
+static inline int gpio_get_value(unsigned gpio)
+{
+	void __iomem *gpio_in = (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_INPUT);
+
+	if (gpio >= AR7_GPIO_MAX)
+		return -EINVAL;
+
+	return ((readl(gpio_in) & (1 << gpio)) != 0);
+}
+
+static inline void gpio_set_value(unsigned gpio, int value)
+{
+	void __iomem *gpio_out = (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_OUTPUT);
+	volatile unsigned tmp;
+
+	if (gpio >= AR7_GPIO_MAX)
+		return;
+
+	tmp = readl(gpio_out) & ~(1 << gpio);
+	if (value) 
+		tmp |= 1 << gpio;
+	writel(tmp, gpio_out);
+}
+
+static inline int gpio_to_irq(unsigned gpio)
+{
+	return -EINVAL;
+}
+
+static inline int irq_to_gpio(unsigned irq)
+{
+	return -EINVAL;
+}
+
+/* Board specific GPIO functions */
+static inline int ar7_gpio_enable(unsigned gpio)
+{
+	void __iomem *gpio_en =	(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_ENABLE);
+
+	if (gpio >= AR7_GPIO_MAX)
+		return -EINVAL;
+
+	writel(readl(gpio_en) | (1 << gpio), gpio_en);
+
+	return 0;
+}
+
+static inline int ar7_gpio_disable(unsigned gpio)
+{
+	void __iomem *gpio_en =	(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_ENABLE);
+
+	if (gpio >= AR7_GPIO_MAX)
+		return -EINVAL;
+
+	writel(readl(gpio_en) & ~(1 << gpio), gpio_en);
+
+	return 0;
+}
+
+#include <asm-generic/gpio.h>
+
+#endif