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 <[email protected]>
> ---
> 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