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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>
This commit is contained in:
Paul Mundt 2012-05-10 16:08:35 +09:00
parent 9ea6404691
commit 8c013d964a
1 changed files with 8 additions and 0 deletions
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8
drivers/watchdog/shwdt.c
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@ -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);