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path: root/drivers/watchdog/pnx4008_wdt.c
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Diffstat (limited to 'drivers/watchdog/pnx4008_wdt.c')
-rw-r--r--drivers/watchdog/pnx4008_wdt.c39
1 files changed, 25 insertions, 14 deletions
diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c
index 430a5848a9a5..c7a9479934af 100644
--- a/drivers/watchdog/pnx4008_wdt.c
+++ b/drivers/watchdog/pnx4008_wdt.c
@@ -96,9 +96,6 @@ static void wdt_enable(void)
{
spin_lock(&io_lock);
- if (wdt_clk)
- clk_set_rate(wdt_clk, 1);
-
/* stop counter, initiate counter reset */
__raw_writel(RESET_COUNT, WDTIM_CTRL(wdt_base));
/*wait for reset to complete. 100% guarantee event */
@@ -125,19 +122,25 @@ static void wdt_disable(void)
spin_lock(&io_lock);
__raw_writel(0, WDTIM_CTRL(wdt_base)); /*stop counter */
- if (wdt_clk)
- clk_set_rate(wdt_clk, 0);
spin_unlock(&io_lock);
}
static int pnx4008_wdt_open(struct inode *inode, struct file *file)
{
+ int ret;
+
if (test_and_set_bit(WDT_IN_USE, &wdt_status))
return -EBUSY;
clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+ ret = clk_enable(wdt_clk);
+ if (ret) {
+ clear_bit(WDT_IN_USE, &wdt_status);
+ return ret;
+ }
+
wdt_enable();
return nonseekable_open(inode, file);
@@ -225,6 +228,7 @@ static int pnx4008_wdt_release(struct inode *inode, struct file *file)
printk(KERN_WARNING "WATCHDOG: Device closed unexpectdly\n");
wdt_disable();
+ clk_disable(wdt_clk);
clear_bit(WDT_IN_USE, &wdt_status);
clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
@@ -273,25 +277,33 @@ static int __devinit pnx4008_wdt_probe(struct platform_device *pdev)
}
wdt_base = (void __iomem *)IO_ADDRESS(res->start);
- wdt_clk = clk_get(&pdev->dev, "wdt_ck");
+ wdt_clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(wdt_clk)) {
ret = PTR_ERR(wdt_clk);
release_resource(wdt_mem);
kfree(wdt_mem);
goto out;
- } else
- clk_set_rate(wdt_clk, 1);
+ }
+
+ ret = clk_enable(wdt_clk);
+ if (ret) {
+ release_resource(wdt_mem);
+ kfree(wdt_mem);
+ goto out;
+ }
ret = misc_register(&pnx4008_wdt_miscdev);
if (ret < 0) {
printk(KERN_ERR MODULE_NAME "cannot register misc device\n");
release_resource(wdt_mem);
kfree(wdt_mem);
- clk_set_rate(wdt_clk, 0);
+ clk_disable(wdt_clk);
+ clk_put(wdt_clk);
} else {
boot_status = (__raw_readl(WDTIM_RES(wdt_base)) & WDOG_RESET) ?
WDIOF_CARDRESET : 0;
wdt_disable(); /*disable for now */
+ clk_disable(wdt_clk);
set_bit(WDT_DEVICE_INITED, &wdt_status);
}
@@ -302,11 +314,10 @@ out:
static int __devexit pnx4008_wdt_remove(struct platform_device *pdev)
{
misc_deregister(&pnx4008_wdt_miscdev);
- if (wdt_clk) {
- clk_set_rate(wdt_clk, 0);
- clk_put(wdt_clk);
- wdt_clk = NULL;
- }
+
+ clk_disable(wdt_clk);
+ clk_put(wdt_clk);
+
if (wdt_mem) {
release_resource(wdt_mem);
kfree(wdt_mem);