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Commit 2cd9645e authored by Daniel Mack's avatar Daniel Mack Committed by Linus Torvalds
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lis3: add power management functions 



This enabled power management functions for the SPI transport layer of the
lis3 devices.  The device's suspend mode is only entered in case no wakeup
threshold has been given.  In this case, the device is supposed to wake up
the system and must thus not be put to deep sleep.

[randy.dunlap@oracle.com: fix lis3-spi for CONFIG_PM=n]
Signed-off-by: default avatarDaniel Mack <daniel@caiaq.de>
Acked-by: default avatarPavel Machek <pavel@ucw.cz>
Cc: Eric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: default avatarRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 8873c334

drivers/hwmon/lis3lv02d_spi.c

+28 −0
Original line number Diff line number Diff line
@@ -87,6 +87,32 @@ static int __devexit lis302dl_spi_remove(struct spi_device *spi) 
	return 0;

}



#ifdef CONFIG_PM

static int lis3lv02d_spi_suspend(struct spi_device *spi, pm_message_t mesg)

{

	struct lis3lv02d *lis3 = spi_get_drvdata(spi);



	if (!lis3->pdata->wakeup_flags)

		lis3lv02d_poweroff(&lis3_dev);



	return 0;

}



static int lis3lv02d_spi_resume(struct spi_device *spi)

{

	struct lis3lv02d *lis3 = spi_get_drvdata(spi);



	if (!lis3->pdata->wakeup_flags)

		lis3lv02d_poweron(lis3);



	return 0;

}



#else

#define lis3lv02d_spi_suspend	NULL

#define lis3lv02d_spi_resume	NULL

#endif



static struct spi_driver lis302dl_spi_driver = {

	.driver	 = {

		.name   = DRV_NAME,
@@ -94,6 +120,8 @@ static struct spi_driver lis302dl_spi_driver = { 
	},

	.probe	= lis302dl_spi_probe,

	.remove	= __devexit_p(lis302dl_spi_remove),

	.suspend = lis3lv02d_spi_suspend,

	.resume  = lis3lv02d_spi_resume,

};



static int __init lis302dl_init(void)