diff options
| author | Artur Petrosyan <Arthur.Petrosyan@synopsys.com> | 2021-04-13 09:37:15 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-13 12:25:12 +0200 |
| commit | 50fb0c128b6e8df62200ba85c05ecd6b1396476d (patch) | |
| tree | 5f58c1ef905cc87ae9a34f5a5f08913b5cf910af /drivers/usb/dwc2/hcd.c | |
| parent | usb: dwc2: Allow exit clock gating in urb enqueue (diff) | |
| download | linux-50fb0c128b6e8df62200ba85c05ecd6b1396476d.tar.xz linux-50fb0c128b6e8df62200ba85c05ecd6b1396476d.zip | |
usb: dwc2: Add clock gating entering flow by system suspend
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>
Link: https://lore.kernel.org/r/20210413073716.30C13A0094@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc2/hcd.c')
| -rw-r--r-- | drivers/usb/dwc2/hcd.c | 9 |
1 files changed, 9 insertions, 0 deletions
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; } |