leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

lis3: add power management functions

Browse Source 
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: Daniel Mack <daniel@caiaq.de>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Eric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Daniel Mack 2009-09-21 17:04:44 -07:00 committed by Linus Torvalds
parent 8873c33483
commit 2cd9645e2f
1 changed files with 28 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/hwmon/lis3lv02d_spi.c
View File

@ -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)