diff options
| author | Winkler, Tomas <tomas.winkler@intel.com> | 2017-03-06 01:53:35 +0200 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2017-04-03 22:46:00 +0300 |
| commit | 095fc30c2c8d2c63ec88745f57711f05af617581 (patch) | |
| tree | 241ca4cb8800e4374e3e3941665fd21bc08f04ff /drivers/char | |
| parent | 4bf4b4ed9de40eb58232a9f576391fdc5e13a7b4 (diff) | |
tpm/tpm_crb: enter the low power state upon device suspend
This fix enables a platform to enter the idle state (suspend-to-idle)
The driver needs to request explicitly go_idle upon completion
from the pm suspend handler.
The runtime pm is disabled on suspend during prepare state by calling
pm_runtime_get_noresume, hence we cannot relay on runtime pm to leave
the device in low power state. Symmetrically cmdReady is called
upon resume.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Siged-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm_crb.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c index 421dfa959a4f..cb6fb131963f 100644 --- a/drivers/char/tpm/tpm_crb.c +++ b/drivers/char/tpm/tpm_crb.c @@ -502,10 +502,33 @@ static int crb_pm_runtime_resume(struct device *dev) return crb_cmd_ready(dev, priv); } + +static int crb_pm_suspend(struct device *dev) +{ + int ret; + + ret = tpm_pm_suspend(dev); + if (ret) + return ret; + + return crb_pm_runtime_suspend(dev); +} + +static int crb_pm_resume(struct device *dev) +{ + int ret; + + ret = crb_pm_runtime_resume(dev); + if (ret) + return ret; + + return tpm_pm_resume(dev); +} + #endif /* CONFIG_PM */ static const struct dev_pm_ops crb_pm = { - SET_SYSTEM_SLEEP_PM_OPS(tpm_pm_suspend, tpm_pm_resume) + SET_SYSTEM_SLEEP_PM_OPS(crb_pm_suspend, crb_pm_resume) SET_RUNTIME_PM_OPS(crb_pm_runtime_suspend, crb_pm_runtime_resume, NULL) }; |