[WATCHDOG] Convert mtx1 wdt to be a platform device and use generic GPIO API
This patch converts the MTX-1 to be a platform device, use the available
generic GPIO API for the MTX-1 board and register the miscdev alias.
Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
diff --git a/drivers/watchdog/mtx-1_wdt.c b/drivers/watchdog/mtx-1_wdt.c
index 9845174..789831b 100644
--- a/drivers/watchdog/mtx-1_wdt.c
+++ b/drivers/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 @@
volatile int queue;
int default_ticks;
unsigned long inuse;
+ unsigned gpio;
} mtx1_wdt_device;
static void mtx1_wdt_trigger(unsigned long unused)
@@ -73,7 +77,8 @@
* 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 +98,7 @@
{
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 +108,7 @@
{
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 +202,12 @@
};
-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 +229,30 @@
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 +261,4 @@
MODULE_AUTHOR("Michael Stickel, Florian Fainelli");
MODULE_DESCRIPTION("Driver for the MTX-1 watchdog");
MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);