openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

usb: dwc2: gadget: exit hibernation before power down 

When disconnecting cable, controller will detect a suspend condition
and enter partial power down. If vbus_session is called by the phy
driver during hibernation, make sure controller exit hibernation
before it is accessed.

Signed-off-by: Jianqiang Tang <jianqiang.tang@intel.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Gregory Herrero 2015-09-29 12:08:28 +02:00 committed by Felipe Balbi
parent 1ee6903b8f
commit 61f7223bf1
1 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/usb/dwc2/gadget.c
View File

@ -3285,14 +3285,15 @@ static int dwc2_hsotg_vbus_session(struct usb_gadget *gadget, int is_active)
dev_dbg(hsotg->dev, "%s: is_active: %d\n", __func__, is_active);
spin_lock_irqsave(&hsotg->lock, flags);
/*
* If controller is hibernated, it must exit from hibernation
* before being initialized / de-initialized
*/
if (hsotg->lx_state == DWC2_L2)
dwc2_exit_hibernation(hsotg, false);
if (is_active) {
hsotg->op_state = OTG_STATE_B_PERIPHERAL;
/*
* If controller is hibernated, it must exit from hibernation
* before being initialized
*/
if (hsotg->lx_state == DWC2_L2)
dwc2_exit_hibernation(hsotg, false);
dwc2_hsotg_core_init_disconnected(hsotg, false);
if (hsotg->enabled)