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Commit 36765293 authored by Wenyou Yang's avatar Wenyou Yang Committed by Wolfram Sang
Browse files

i2c: at91: add support for system PM 



Signed-off-by: default avatarWenyou Yang <wenyou.yang@atmel.com>
Acked-by: default avatarLudovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent d64a8188

drivers/i2c/busses/i2c-at91.c

+26 −0
Original line number Diff line number Diff line
@@ -861,7 +861,33 @@ static int at91_twi_runtime_resume(struct device *dev) 
	return clk_prepare_enable(twi_dev->clk);

}



static int at91_twi_suspend_noirq(struct device *dev)

{

	if (!pm_runtime_status_suspended(dev))

		at91_twi_runtime_suspend(dev);



	return 0;

}



static int at91_twi_resume_noirq(struct device *dev)

{

	int ret;



	if (!pm_runtime_status_suspended(dev)) {

		ret = at91_twi_runtime_resume(dev);

		if (ret)

			return ret;

	}



	pm_runtime_mark_last_busy(dev);

	pm_request_autosuspend(dev);



	return 0;

}



static const struct dev_pm_ops at91_twi_pm = {

	.suspend_noirq	= at91_twi_suspend_noirq,

	.resume_noirq	= at91_twi_resume_noirq,

	.runtime_suspend	= at91_twi_runtime_suspend,

	.runtime_resume		= at91_twi_runtime_resume,

};