| Message ID | 20210413073723.BA0FEA022E@mailhost.synopsys.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v2,01/12] usb: dwc2: Add device clock gating support functions | expand |
On 13.04.2021 10:37, Artur Petrosyan wrote: > If not hibernation nor partial power down are supported, s/not/neither/? > 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@synopsys.com> > --- > Changes in v2: > - None > > 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, s/not/neither/? [...] MBR, Sergei
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;
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@synopsys.com> --- Changes in v2: - None drivers/usb/dwc2/hcd.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)