| Message ID | 20210413073716.30C13A0094@mailhost.synopsys.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | None | expand |
On 13.04.2021 10:37, Artur Petrosyan wrote: > If not hibernation nor partial power down are supported, s/not/neither/? > clock gating is used to save power. > > Adds a new flow of entering clock gating when PC is > suspended. > > Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com> > --- > Changes in v2: > - None > > drivers/usb/dwc2/hcd.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c > index 31d6a1b87228..09dcd37b9ef8 100644 > --- a/drivers/usb/dwc2/hcd.c > +++ b/drivers/usb/dwc2/hcd.c > @@ -4372,6 +4372,15 @@ static int _dwc2_hcd_suspend(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/? > + * clock gating is used to save power. > + */ > + dwc2_host_enter_clock_gating(hsotg); > + > + /* After entering suspend, hardware is not accessible */ > + clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); > + break; > default: > goto skip_power_saving; > } MBR, Sergei
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 31d6a1b87228..09dcd37b9ef8 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -4372,6 +4372,15 @@ static int _dwc2_hcd_suspend(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, + * clock gating is used to save power. + */ + dwc2_host_enter_clock_gating(hsotg); + + /* After entering suspend, hardware is not accessible */ + clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + break; default: goto skip_power_saving; }
If not hibernation nor partial power down are supported, clock gating is used to save power. Adds a new flow of entering clock gating when PC is suspended. Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com> --- Changes in v2: - None drivers/usb/dwc2/hcd.c | 9 +++++++++ 1 file changed, 9 insertions(+)