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authorPaul Mundt <lethal@linux-sh.org>2012-05-10 11:08:35 +0400
committerPaul Mundt <lethal@linux-sh.org>2012-05-10 11:08:35 +0400
commit8c013d964ac32c20afe2cdeadf59926d87012b37 (patch)
treea20f0d26d4c59ed86970a8954e93e36fa55a399c /drivers/watchdog/shwdt.c
parent9ea6404691a520f734b819cbbd4757b0ea5f99c6 (diff)
downloadlinux-8c013d964ac32c20afe2cdeadf59926d87012b37.tar.xz
watchdog: shwdt: Preliminary runtime PM support.
This plugs in some trivial runtime PM support in the probe/remove and start/stop paths. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/watchdog/shwdt.c')
-rw-r--r--drivers/watchdog/shwdt.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/watchdog/shwdt.c b/drivers/watchdog/shwdt.c
index 380ada4e5d66..b11104702d23 100644
--- a/drivers/watchdog/shwdt.c
+++ b/drivers/watchdog/shwdt.c
@@ -28,6 +28,7 @@
#include <linux/spinlock.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
+#include <linux/pm_runtime.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/slab.h>
@@ -87,6 +88,8 @@ static int sh_wdt_start(struct watchdog_device *wdt_dev)
unsigned long flags;
u8 csr;
+ pm_runtime_get_sync(wdt->dev);
+
spin_lock_irqsave(&wdt->lock, flags);
next_heartbeat = jiffies + (heartbeat * HZ);
@@ -137,6 +140,8 @@ static int sh_wdt_stop(struct watchdog_device *wdt_dev)
spin_unlock_irqrestore(&wdt->lock, flags);
+ pm_runtime_put_sync(wdt->dev);
+
return 0;
}
@@ -283,6 +288,8 @@ static int __devinit sh_wdt_probe(struct platform_device *pdev)
dev_info(&pdev->dev, "initialized.\n");
+ pm_runtime_enable(&pdev->dev);
+
return 0;
out_disable:
@@ -300,6 +307,7 @@ static int __devexit sh_wdt_remove(struct platform_device *pdev)
watchdog_unregister_device(&sh_wdt_dev);
+ pm_runtime_disable(&pdev->dev);
clk_disable(wdt->clk);
clk_put(wdt->clk);