From 50fb0c128b6e8df62200ba85c05ecd6b1396476d Mon Sep 17 00:00:00 2001 From: Artur Petrosyan Date: Tue, 13 Apr 2021 11:37:15 +0400 Subject: [PATCH] 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 Link: https://lore.kernel.org/r/20210413073716.30C13A0094@mailhost.synopsys.com Signed-off-by: Greg Kroah-Hartman --- 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 31d6a1b87228d..09dcd37b9ef84 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; } -- 2.30.2