If not hibernation nor partial power down are supported, port resume is done using the clock gating programming flow. Adds a new flow of exiting clock gating when PC is resumed. Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@xxxxxxxxxxxx> --- drivers/usb/dwc2/hcd.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 09dcd37b9ef8..04a1b53d65af 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -4445,6 +4445,28 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd) break; case DWC2_POWER_DOWN_PARAM_HIBERNATION: case DWC2_POWER_DOWN_PARAM_NONE: + /* + * If not hibernation nor partial power down are supported, + * port resume is done using the clock gating programming flow. + */ + spin_unlock_irqrestore(&hsotg->lock, flags); + dwc2_host_exit_clock_gating(hsotg, 0); + + /* + * Initialize the Core for Host mode, as after system resume + * the global interrupts are disabled. + */ + dwc2_core_init(hsotg, false); + dwc2_enable_global_interrupts(hsotg); + dwc2_hcd_reinit(hsotg); + spin_lock_irqsave(&hsotg->lock, flags); + + /* + * Set HW accessible bit before powering on the controller + * since an interrupt may rise. + */ + set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + break; default: hsotg->lx_state = DWC2_L0; goto unlock; -- 2.25.1
