make gpio conformant to generic gpio spec.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8911 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ar7/files/arch/mips/ar7/gpio.c b/target/linux/ar7/files/arch/mips/ar7/gpio.c
index e18dfe8..11f300f 100644 (file)
--- 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 1af1a87..980739f 100644 (file)
--- 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 d3cd7d9..aa68a5b 100644 (file)
--- 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 fb137c9..53ab53f 100644 (file)
--- 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 c82ba78..a7ae1ee 100644 (file)
--- 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)