Commit 77c9539d authored by Mark A. Greer's avatar Mark A. Greer Committed by Samuel Ortiz
Browse files

NFC: trf7970a: Add System Suspend/Resume support 



Add system suspend/resume support by gracefully
shutting things down when suspending and bringing
the device back to full power when resuming.

Signed-off-by: default avatarMark A. Greer <mgreer@animalcreek.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent b528281b

drivers/nfc/trf7970a.c

+37 −0
Original line number Diff line number Diff line
@@ -1594,6 +1594,42 @@ static int trf7970a_remove(struct spi_device *spi) 
	return 0;

}



#ifdef CONFIG_PM_SLEEP

static int trf7970a_suspend(struct device *dev)

{

	struct spi_device *spi = container_of(dev, struct spi_device, dev);

	struct trf7970a *trf = spi_get_drvdata(spi);

	int ret = 0;



	dev_dbg(dev, "Suspend\n");



	mutex_lock(&trf->lock);



	trf7970a_shutdown(trf);



	mutex_unlock(&trf->lock);



	return ret;

}



static int trf7970a_resume(struct device *dev)

{

	struct spi_device *spi = container_of(dev, struct spi_device, dev);

	struct trf7970a *trf = spi_get_drvdata(spi);

	int ret = 0;



	dev_dbg(dev, "Resume\n");



	mutex_lock(&trf->lock);



	ret = trf7970a_startup(trf);



	mutex_unlock(&trf->lock);



	return ret;

}

#endif



#ifdef CONFIG_PM_RUNTIME

static int trf7970a_pm_runtime_suspend(struct device *dev)

{
@@ -1629,6 +1665,7 @@ static int trf7970a_pm_runtime_resume(struct device *dev) 
#endif



static const struct dev_pm_ops trf7970a_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(trf7970a_suspend, trf7970a_resume)

	SET_RUNTIME_PM_OPS(trf7970a_pm_runtime_suspend,

			trf7970a_pm_runtime_resume, NULL)

};