The watchdog driver is now a platform device driver and reads its gpio line while registering

SVN-Revision: 9425
17 years ago · 66231687af
parent f038ae8671
commit 66231687af
1 changed files with 104 additions and 0 deletions
--- a/target/linux/au1000/patches/016-watchdog_pdev_gpio.patch
+++ b/target/linux/au1000/patches/016-watchdog_pdev_gpio.patch
@ -0,0 +1,104 @@
+diff --git a/drivers/char/watchdog/mtx-1_wdt.c b/drivers/char/watchdog/mtx-1_wdt.c
+index dcfd401..5d8c51f 100644
+--- a/drivers/char/watchdog/mtx-1_wdt.c
+++ b/drivers/char/watchdog/mtx-1_wdt.c
+@@ -45,10 +45,13 @@
+ #include <linux/completion.h>
+ #include <linux/jiffies.h>
+ #include <linux/watchdog.h>
+#include <linux/platform_device.h>
+
+ #include <asm/io.h>
+ #include <asm/uaccess.h>
+ 
+ #include <asm/mach-au1x00/au1000.h>
+#include <asm/gpio.h>
+ 
+ #define MTX1_WDT_INTERVAL	(5 * HZ)
+ 
+@@ -61,6 +64,7 @@ static struct {
+ 	volatile int queue;
+ 	int default_ticks;
+ 	unsigned long inuse;
+	unsigned gpio;
+ } mtx1_wdt_device;
+ 
+ static void mtx1_wdt_trigger(unsigned long unused)
+@@ -73,7 +77,7 @@ static void mtx1_wdt_trigger(unsigned long unused)
+ 	 * toggle GPIO2_15
+ 	 */
+ 	tmp = au_readl(GPIO2_DIR);
+-	tmp = (tmp & ~(1<<15)) | ((~tmp) & (1<<15));
+	tmp = (tmp & ~(1<< mtx1_wdt_device.gpio)) | ((~tmp) & (1<< mtx1_wdt_device.gpio));
+ 	au_writel (tmp, GPIO2_DIR);
+ 
+ 	if (mtx1_wdt_device.queue && ticks)
+@@ -93,7 +97,7 @@ static void mtx1_wdt_start(void)
+ {
+ 	if (!mtx1_wdt_device.queue) {
+ 		mtx1_wdt_device.queue = 1;
+-		au_writel (au_readl(GPIO2_DIR) | (u32)(1<<15), GPIO2_DIR);
+		gpio_set_value(mtx1_wdt_device.gpio, 1);
+ 		mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL);
+ 	}
+ 	mtx1_wdt_device.running++;
+@@ -103,7 +107,7 @@ static int mtx1_wdt_stop(void)
+ {
+ 	if (mtx1_wdt_device.queue) {
+ 		mtx1_wdt_device.queue = 0;
+-		au_writel (au_readl(GPIO2_DIR) & ~((u32)(1<<15)), GPIO2_DIR);
+		gpio_set_value(mtx1_wdt_device.gpio, 0);
+ 	}
+ 
+ 	ticks = mtx1_wdt_device.default_ticks;
+@@ -197,10 +201,12 @@ static struct miscdevice mtx1_wdt_misc = {
+ };
+ 
+ 
+-static int __init mtx1_wdt_init(void)
+static int mtx1_wdt_probe(struct platform_device *pdev)
+ {
+ 	int ret;
+ 
+	mtx1_wdt_device.gpio = pdev->resource[0].start;	
+
+ 	if ((ret = misc_register(&mtx1_wdt_misc)) < 0) {
+ 		printk(KERN_ERR " mtx-1_wdt : failed to register\n");
+ 		return ret;
+@@ -222,13 +228,30 @@ static int __init mtx1_wdt_init(void)
+ 	return 0;
+ }
+ 
+-static void __exit mtx1_wdt_exit(void)
+static int mtx1_wdt_remove(struct platform_device *pdev)
+ {
+ 	if (mtx1_wdt_device.queue) {
+ 		mtx1_wdt_device.queue = 0;
+ 		wait_for_completion(&mtx1_wdt_device.stop);
+ 	}
+ 	misc_deregister(&mtx1_wdt_misc);
+	return 0;
+}
+
+static struct platform_driver mtx1_wdt = {
+	.probe = mtx1_wdt_probe,
+	.remove = mtx1_wdt_remove,
+	.driver.name = "mtx1-wdt",
+};
+
+static int __init mtx1_wdt_init(void)
+{
+	return platform_driver_register(&mtx1_wdt);
+}
+
+static void __exit mtx1_wdt_exit(void)
+{
+	platform_driver_unregister(&mtx1_wdt);
+ }
+ 
+ module_init(mtx1_wdt_init);
+@@ -237,3 +260,4 @@ module_exit(mtx1_wdt_exit);
+ MODULE_AUTHOR("Michael Stickel, Florian Fainelli");
+ MODULE_DESCRIPTION("Driver for the MTX-1 watchdog");
+ MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);