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Commit f6431732 authored by Magnus Damm's avatar Magnus Damm Committed by Paul Mundt
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sh: CMT suspend/resume 



This patch updates the SuperH CMT driver with suspend and resume
callbacks for the suspend-to-ram case. This patch stops the CMT
channel at suspend time to avoid unwanted wake up events.

Signed-off-by: default avatarMagnus Damm <damm@igel.co.jp>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 21bc1f02

drivers/clocksource/sh_cmt.c

+28 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ struct sh_cmt_priv { 
	struct platform_device *pdev;



	unsigned long flags;

	unsigned long flags_suspend;

	unsigned long match_value;

	unsigned long next_match_value;

	unsigned long max_match_value;
@@ -667,11 +668,38 @@ static int __devexit sh_cmt_remove(struct platform_device *pdev) 
	return -EBUSY; /* cannot unregister clockevent and clocksource */

}



static int sh_cmt_suspend(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct sh_cmt_priv *p = platform_get_drvdata(pdev);



	/* save flag state and stop CMT channel */

	p->flags_suspend = p->flags;

	sh_cmt_stop(p, p->flags);

	return 0;

}



static int sh_cmt_resume(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct sh_cmt_priv *p = platform_get_drvdata(pdev);



	/* start CMT channel from saved state */

	sh_cmt_start(p, p->flags_suspend);

	return 0;

}



static struct dev_pm_ops sh_cmt_dev_pm_ops = {

	.suspend = sh_cmt_suspend,

	.resume = sh_cmt_resume,

};



static struct platform_driver sh_cmt_device_driver = {

	.probe		= sh_cmt_probe,

	.remove		= __devexit_p(sh_cmt_remove),

	.driver		= {

		.name	= "sh_cmt",

		.pm	= &sh_cmt_dev_pm_ops,

	}

};