fix-wlan-share-bringup.patch

Use the same code for bringup during initialization and when switching
the module on/off through sysfs.

This also solves the problem of not resetting the WLAN module, which
was caused by fix-set-wlan-power-mgt-to-default-on.patch only partially
reverting the power-off default introduced with
introduce-gta02-pm-wlan.patch.

Signed-off-by: Werner Almesberger <werner@openmoko.org>

---

diff --git a/arch/arm/plat-s3c24xx/gta02_pm_wlan.c b/arch/arm/plat-s3c24xx/gta02_pm_wlan.c
index 7c6154d..b55ba24 100644
--- a/arch/arm/plat-s3c24xx/gta02_pm_wlan.c
+++ b/arch/arm/plat-s3c24xx/gta02_pm_wlan.c
@@ -26,25 +26,13 @@
 
 #include <linux/delay.h>
 
-static ssize_t gta02_wlan_read(struct device *dev,
-				       struct device_attribute *attr, char *buf)
-{
-	if (s3c2410_gpio_getpin(GTA02_CHIP_PWD))
-		return strlcpy(buf, "0\n", 3);
-
-	return strlcpy(buf, "1\n", 3);
-}
 
-static ssize_t gta02_wlan_write(struct device *dev,
-		   struct device_attribute *attr, const char *buf, size_t count)
+static void gta02_wlan_power(int on)
 {
-	unsigned long on = simple_strtoul(buf, NULL, 10) & 1;
-
 	if (!on) {
 		s3c2410_gpio_setpin(GTA02_CHIP_PWD, 1);
 		s3c2410_gpio_setpin(GTA02_GPIO_nWLAN_RESET, 0);
-
-		return count;
+		return;
 	}
 
 	/* power up sequencing */
@@ -56,6 +44,23 @@ static ssize_t gta02_wlan_write(struct device *dev,
 	msleep(100);
 	s3c2410_gpio_setpin(GTA02_GPIO_nWLAN_RESET, 1);
 
+}
+
+static ssize_t gta02_wlan_read(struct device *dev,
+				       struct device_attribute *attr, char *buf)
+{
+	if (s3c2410_gpio_getpin(GTA02_CHIP_PWD))
+		return strlcpy(buf, "0\n", 3);
+
+	return strlcpy(buf, "1\n", 3);
+}
+
+static ssize_t gta02_wlan_write(struct device *dev,
+		   struct device_attribute *attr, const char *buf, size_t count)
+{
+	unsigned long on = simple_strtoul(buf, NULL, 10) & 1;
+
+	gta02_wlan_power(on);
 	return count;
 }
 
@@ -100,12 +105,9 @@ static int __init gta02_wlan_probe(struct platform_device *pdev)
 
 	dev_info(&pdev->dev, "starting\n");
 
-	/* Power is down */
-	s3c2410_gpio_setpin(GTA02_CHIP_PWD, !default_state);
 	s3c2410_gpio_cfgpin(GTA02_CHIP_PWD, S3C2410_GPIO_OUTPUT);
-	/* reset is asserted */
-	s3c2410_gpio_setpin(GTA02_GPIO_nWLAN_RESET, default_state);
 	s3c2410_gpio_cfgpin(GTA02_GPIO_nWLAN_RESET, S3C2410_GPIO_OUTPUT);
+	gta02_wlan_power(default_state);
 
 	return sysfs_create_group(&pdev->dev.kobj, &gta02_wlan_attr_group);
 }