diff options
| author | Li Jun <B47624@freescale.com> | 2014-07-18 16:16:09 +0800 |
|---|---|---|
| committer | Li Jun <B47624@freescale.com> | 2014-07-18 16:28:31 +0800 |
| commit | 8532e80d479ef7ea61e288b321c10d1b14933196 (patch) | |
| tree | aef83f8239d3d9e2c20eb6d439125219fbad9ff8 | |
| parent | ad0a08722750b31b594fec65e12439d911fa0a01 (diff) | |
ENGR00323241 usb: chipidea: otg: delay 2s to decrease power.usage_count
There is 2s delay for controller resume from usb wakeup case already,
in OTG fsm mode, A-dev can start a new session via sys input file(means
not via usb wakeup), in this case, A-dev still need the 2s delay for
host root hub access registers, otherwise system will hang due to access
register at low power mode.
Signed-off-by: Li Jun <b47624@freescale.com>
| -rw-r--r-- | drivers/usb/chipidea/otg_fsm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c index 6faab2a06053..f258860365cb 100644 --- a/drivers/usb/chipidea/otg_fsm.c +++ b/drivers/usb/chipidea/otg_fsm.c @@ -669,6 +669,10 @@ int ci_otg_fsm_work(struct ci_hdrc *ci) */ ci_otg_queue_work(ci); } + } else if (ci->transceiver->state == OTG_STATE_A_HOST) { + if (!timer_pending(&ci->timer)) + pm_runtime_get(ci->dev); + mod_timer(&ci->timer, jiffies + msecs_to_jiffies(2000)); } } pm_runtime_put_sync(ci->dev); |