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>
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@ -28,6 +28,7 @@
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#include <linux/spinlock.h>
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#include <linux/miscdevice.h>
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#include <linux/watchdog.h>
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#include <linux/pm_runtime.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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@ -87,6 +88,8 @@ static int sh_wdt_start(struct watchdog_device *wdt_dev)
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unsigned long flags;
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u8 csr;
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pm_runtime_get_sync(wdt->dev);
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spin_lock_irqsave(&wdt->lock, flags);
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next_heartbeat = jiffies + (heartbeat * HZ);
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@ -137,6 +140,8 @@ static int sh_wdt_stop(struct watchdog_device *wdt_dev)
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spin_unlock_irqrestore(&wdt->lock, flags);
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pm_runtime_put_sync(wdt->dev);
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return 0;
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}
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@ -283,6 +288,8 @@ static int __devinit sh_wdt_probe(struct platform_device *pdev)
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dev_info(&pdev->dev, "initialized.\n");
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pm_runtime_enable(&pdev->dev);
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return 0;
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out_disable:
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@ -300,6 +307,7 @@ static int __devexit sh_wdt_remove(struct platform_device *pdev)
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watchdog_unregister_device(&sh_wdt_dev);
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pm_runtime_disable(&pdev->dev);
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clk_disable(wdt->clk);
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clk_put(wdt->clk);
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