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path: root/drivers/watchdog/mtx-1_wdt.c
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Diffstat (limited to 'drivers/watchdog/mtx-1_wdt.c')
-rw-r--r--drivers/watchdog/mtx-1_wdt.c29
1 files changed, 16 insertions, 13 deletions
diff --git a/drivers/watchdog/mtx-1_wdt.c b/drivers/watchdog/mtx-1_wdt.c
index 1479dc4d6129..0430e093b1a0 100644
--- a/drivers/watchdog/mtx-1_wdt.c
+++ b/drivers/watchdog/mtx-1_wdt.c
@@ -66,23 +66,18 @@ static struct {
int default_ticks;
unsigned long inuse;
unsigned gpio;
- int gstate;
+ unsigned int gstate;
} mtx1_wdt_device;
static void mtx1_wdt_trigger(unsigned long unused)
{
- u32 tmp;
-
spin_lock(&mtx1_wdt_device.lock);
if (mtx1_wdt_device.running)
ticks--;
/* toggle wdt gpio */
- mtx1_wdt_device.gstate = ~mtx1_wdt_device.gstate;
- if (mtx1_wdt_device.gstate)
- gpio_direction_output(mtx1_wdt_device.gpio, 1);
- else
- gpio_direction_input(mtx1_wdt_device.gpio);
+ mtx1_wdt_device.gstate = !mtx1_wdt_device.gstate;
+ gpio_set_value(mtx1_wdt_device.gpio, mtx1_wdt_device.gstate);
if (mtx1_wdt_device.queue && ticks)
mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL);
@@ -105,7 +100,7 @@ static void mtx1_wdt_start(void)
if (!mtx1_wdt_device.queue) {
mtx1_wdt_device.queue = 1;
mtx1_wdt_device.gstate = 1;
- gpio_direction_output(mtx1_wdt_device.gpio, 1);
+ gpio_set_value(mtx1_wdt_device.gpio, 1);
mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL);
}
mtx1_wdt_device.running++;
@@ -120,7 +115,7 @@ static int mtx1_wdt_stop(void)
if (mtx1_wdt_device.queue) {
mtx1_wdt_device.queue = 0;
mtx1_wdt_device.gstate = 0;
- gpio_direction_output(mtx1_wdt_device.gpio, 0);
+ gpio_set_value(mtx1_wdt_device.gpio, 0);
}
ticks = mtx1_wdt_device.default_ticks;
spin_unlock_irqrestore(&mtx1_wdt_device.lock, flags);
@@ -214,6 +209,12 @@ static int __devinit mtx1_wdt_probe(struct platform_device *pdev)
int ret;
mtx1_wdt_device.gpio = pdev->resource[0].start;
+ ret = gpio_request_one(mtx1_wdt_device.gpio,
+ GPIOF_OUT_INIT_HIGH, "mtx1-wdt");
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to request gpio");
+ return ret;
+ }
spin_lock_init(&mtx1_wdt_device.lock);
init_completion(&mtx1_wdt_device.stop);
@@ -239,11 +240,13 @@ static int __devexit mtx1_wdt_remove(struct platform_device *pdev)
mtx1_wdt_device.queue = 0;
wait_for_completion(&mtx1_wdt_device.stop);
}
+
+ gpio_free(mtx1_wdt_device.gpio);
misc_deregister(&mtx1_wdt_misc);
return 0;
}
-static struct platform_driver mtx1_wdt = {
+static struct platform_driver mtx1_wdt_driver = {
.probe = mtx1_wdt_probe,
.remove = __devexit_p(mtx1_wdt_remove),
.driver.name = "mtx1-wdt",
@@ -252,12 +255,12 @@ static struct platform_driver mtx1_wdt = {
static int __init mtx1_wdt_init(void)
{
- return platform_driver_register(&mtx1_wdt);
+ return platform_driver_register(&mtx1_wdt_driver);
}
static void __exit mtx1_wdt_exit(void)
{
- platform_driver_unregister(&mtx1_wdt);
+ platform_driver_unregister(&mtx1_wdt_driver);
}
module_init(mtx1_wdt_init);