From: Eugene Konev <ejka@imfi.kspu.ru>
Date: Fri, 21 Sep 2007 12:37:50 +0000 (+0000)
Subject: make gpio conformant to generic gpio spec.
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=041a03c5bdb4339f3ed2bc90268747de5b20c951;p=openwrt%2Fstaging%2Fldir.git

make gpio conformant to generic gpio spec.

SVN-Revision: 8911
---

diff --git a/target/linux/ar7/files/arch/mips/ar7/gpio.c b/target/linux/ar7/files/arch/mips/ar7/gpio.c
index e18dfe873a..11f300fead 100644
--- a/target/linux/ar7/files/arch/mips/ar7/gpio.c
+++ b/target/linux/ar7/files/arch/mips/ar7/gpio.c
@@ -20,9 +20,9 @@
 
 #include <asm/ar7/gpio.h>
 
-static char *ar7_gpio_list[AR7_GPIO_MAX] = { 0, };
+static const char *ar7_gpio_list[AR7_GPIO_MAX] = { 0, };
 
-int gpio_request(unsigned gpio, char *label)
+int gpio_request(unsigned gpio, const char *label)
 {
 	if (gpio >= AR7_GPIO_MAX)
 		return -EINVAL;
diff --git a/target/linux/ar7/files/arch/mips/ar7/platform.c b/target/linux/ar7/files/arch/mips/ar7/platform.c
index 1af1a87b2a..980739f90a 100644
--- a/target/linux/ar7/files/arch/mips/ar7/platform.c
+++ b/target/linux/ar7/files/arch/mips/ar7/platform.c
@@ -58,10 +58,9 @@ static int vlynq_on(struct vlynq_device *dev)
 	if ((result = ar7_gpio_enable(pdata->gpio_bit)))
 		goto out_enabled;
 
-	if ((result = gpio_direction_output(pdata->gpio_bit)))
+	if ((result = gpio_direction_output(pdata->gpio_bit, 0)))
 		goto out_gpio_enabled;
 
-	gpio_set_value(pdata->gpio_bit, 0);
 	mdelay(50);
 
 	gpio_set_value(pdata->gpio_bit, 1);
diff --git a/target/linux/ar7/files/drivers/char/ar7_gpio.c b/target/linux/ar7/files/drivers/char/ar7_gpio.c
index d3cd7d96cc..aa68a5b87b 100644
--- a/target/linux/ar7/files/drivers/char/ar7_gpio.c
+++ b/target/linux/ar7/files/drivers/char/ar7_gpio.c
@@ -73,7 +73,7 @@ static ssize_t ar7_gpio_write(struct file *file, const char __user *buf,
 		case 'o':
 		case 'O':
 		case '>':
-			gpio_direction_output(pin);
+			gpio_direction_output(pin, 0);
 			break;
 		default:
 			return -EINVAL;
diff --git a/target/linux/ar7/files/drivers/leds/leds-ar7.c b/target/linux/ar7/files/drivers/leds/leds-ar7.c
index fb137c9221..53ab53f208 100644
--- a/target/linux/ar7/files/drivers/leds/leds-ar7.c
+++ b/target/linux/ar7/files/drivers/leds/leds-ar7.c
@@ -73,7 +73,7 @@ static int ar7_leds_probe(struct platform_device *pdev)
 		goto out;
 
 	ar7_gpio_enable(AR7_GPIO_BIT_STATUS_LED);
-	gpio_direction_output(AR7_GPIO_BIT_STATUS_LED);
+	gpio_direction_output(AR7_GPIO_BIT_STATUS_LED, 0);
 
 out:
 	return rc;
diff --git a/target/linux/ar7/files/include/asm-mips/ar7/gpio.h b/target/linux/ar7/files/include/asm-mips/ar7/gpio.h
index c82ba78cf9..a7ae1eeae1 100644
--- a/target/linux/ar7/files/include/asm-mips/ar7/gpio.h
+++ b/target/linux/ar7/files/include/asm-mips/ar7/gpio.h
@@ -22,24 +22,37 @@
 
 #define AR7_GPIO_MAX 32
 
-extern int gpio_request(unsigned gpio, char *label);
+extern int gpio_request(unsigned gpio, const char *label);
 extern void gpio_free(unsigned gpio);
 
 /* Common GPIO layer */
-static inline int gpio_direction_input(unsigned gpio)
+static inline int gpio_get_value(unsigned gpio)
 {
-	void __iomem *gpio_dir =
-		(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
+	void __iomem *gpio_in =
+		(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_INPUT);
 
 	if (gpio >= AR7_GPIO_MAX)
 		return -EINVAL;
 
-	writel(readl(gpio_dir) | (1 << gpio), gpio_dir);
+	return ((readl(gpio_in) & (1 << gpio)) != 0);
+}
 
-	return 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_direction_output(unsigned gpio)
+static inline int gpio_direction_input(unsigned gpio)
 {
 	void __iomem *gpio_dir =
 		(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
@@ -47,35 +60,23 @@ static inline int gpio_direction_output(unsigned gpio)
 	if (gpio >= AR7_GPIO_MAX)
 		return -EINVAL;
 
-	writel(readl(gpio_dir) & ~(1 << gpio), gpio_dir);
+	writel(readl(gpio_dir) | (1 << gpio), gpio_dir);
 
 	return 0;
 }
 
-static inline int gpio_get_value(unsigned gpio)
+static inline int gpio_direction_output(unsigned gpio, int value)
 {
-	void __iomem *gpio_in =
-		(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_INPUT);
+	void __iomem *gpio_dir =
+		(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
 
 	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;
+	gpio_set_value(gpio, value);
+	writel(readl(gpio_dir) & ~(1 << gpio), gpio_dir);
 
-	tmp = readl(gpio_out) & ~(1 << gpio);
-	if (value)
-		tmp |= 1 << gpio;
-	writel(tmp, gpio_out);
+	return 0;
 }
 
 static inline int gpio_to_irq(unsigned gpio)