gpio: Replace ARM gpio.h with the common API in include/asm-generic

ARM boards should use the generic GPIO API
This means changing gpio to unsigned type
Remove the unused gpio_toggle() function which is not part of the API
Comment that free should not modify pin state

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Cc: Joe Hershberger <joe.hershberger@gmail.com>

fixed merge conflict in da8xx_gpio.c, tegra2_gpio.c, and
extended to the new mxs_gpio.c.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>

1 files changed, 20 insertions, 22 deletions

diff --git a/drivers/gpio/mxc_gpio.c b/drivers/gpio/mxc_gpio.c
index 908808d..df6bbbb 100644
--- a/drivers/gpio/mxc_gpio.c
+++ b/drivers/gpio/mxc_gpio.c
@@ -58,7 +58,7 @@ static int mxc_gpio_direction(unsigned int gpio,
 	u32 l;
 
 	if (port >= ARRAY_SIZE(gpio_ports))
-		return -EINVAL;
+		return -1;
 
 	gpio &= 0x1f;
 
@@ -78,14 +78,14 @@ static int mxc_gpio_direction(unsigned int gpio,
 	return 0;
 }
 
-void gpio_set_value(int gpio, int value)
+int gpio_set_value(unsigned gpio, int value)
 {
 	unsigned int port = gpio >> 5;
 	struct gpio_regs *regs;
 	u32 l;
 
 	if (port >= ARRAY_SIZE(gpio_ports))
-		return;
+		return -1;
 
 	gpio &= 0x1f;
 
@@ -97,55 +97,53 @@ void gpio_set_value(int gpio, int value)
 	else
 		l &= ~(1 << gpio);
 	writel(l, &regs->gpio_dr);
+
+	return 0;
 }
 
-int gpio_get_value(int gpio)
+int gpio_get_value(unsigned gpio)
 {
 	unsigned int port = gpio >> 5;
 	struct gpio_regs *regs;
-	u32 l;
+	u32 val;
 
 	if (port >= ARRAY_SIZE(gpio_ports))
-		return -EINVAL;
+		return -1;
 
 	gpio &= 0x1f;
 
 	regs = (struct gpio_regs *)gpio_ports[port];
 
-	l = (readl(&regs->gpio_dr) >> gpio) & 0x01;
+	val = (readl(&regs->gpio_dr) >> gpio) & 0x01;
 
-	return l;
+	return val;
 }
 
-int gpio_request(int gp, const char *label)
+int gpio_request(unsigned gpio, const char *label)
 {
-	unsigned int port = gp >> 5;
+	unsigned int port = gpio >> 5;
 	if (port >= ARRAY_SIZE(gpio_ports))
-		return -EINVAL;
+		return -1;
 	return 0;
 }
 
-void gpio_free(int gp)
+int gpio_free(unsigned gpio)
 {
+	return 0;
 }
 
-void gpio_toggle_value(int gp)
-{
-	gpio_set_value(gp, !gpio_get_value(gp));
-}
-
-int gpio_direction_input(int gp)
+int gpio_direction_input(unsigned gpio)
 {
-	return mxc_gpio_direction(gp, MXC_GPIO_DIRECTION_IN);
+	return mxc_gpio_direction(gpio, MXC_GPIO_DIRECTION_IN);
 }
 
-int gpio_direction_output(int gp, int value)
+int gpio_direction_output(unsigned gpio, int value)
 {
-	int ret = mxc_gpio_direction(gp, MXC_GPIO_DIRECTION_OUT);
+	int ret = mxc_gpio_direction(gpio, MXC_GPIO_DIRECTION_OUT);
 
 	if (ret < 0)
 		return ret;
 
-	gpio_set_value(gp, value);
+	gpio_set_value(gpio, value);
 	return 0;
 }