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| author | Mark A. Greer <mgreer@animalcreek.com> | 2014-09-02 15:12:37 -0700 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2014-09-07 23:13:44 +0200 |
| commit | 77c9539dc1284677539af442ac3629c9baf01202 (patch) | |
| tree | f986216ebf2a7fb67124595023d3476b5bd793ca /drivers/nfc/trf7970a.c | |
| parent | b528281b8b7a9c379baf37720191a799fbc9800c (diff) | |
| download | linux-77c9539dc1284677539af442ac3629c9baf01202.tar.gz | |
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: Mark A. Greer <mgreer@animalcreek.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/nfc/trf7970a.c')
| -rw-r--r-- | drivers/nfc/trf7970a.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c index a42675da0667..3859e02c4e2d 100644 --- a/drivers/nfc/trf7970a.c +++ b/drivers/nfc/trf7970a.c @@ -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) }; |