Commit 755d0eff authored by Artur Petrosyan's avatar Artur Petrosyan Committed by Greg Kroah-Hartman
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usb: dwc2: Add hibernation entering flow by system suspend 



Adds a new flow of entering hibernation when PC is
hibernated or suspended.

Acked-by: default avatarMinas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: default avatarArtur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210416124811.BBFDBA005C@mailhost.synopsys.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent c3595df7

drivers/usb/dwc2/hcd.c

+10 −0
Original line number Diff line number Diff line
@@ -4387,6 +4387,16 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) 
		clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);

		break;

	case DWC2_POWER_DOWN_PARAM_HIBERNATION:

		/* Enter hibernation */

		spin_unlock_irqrestore(&hsotg->lock, flags);

		ret = dwc2_enter_hibernation(hsotg, 1);

		if (ret)

			dev_err(hsotg->dev, "enter hibernation failed\n");

		spin_lock_irqsave(&hsotg->lock, flags);



		/* After entering suspend, hardware is not accessible */

		clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);

		break;

	case DWC2_POWER_DOWN_PARAM_NONE:

		/*

		 * If not hibernation nor partial power down are supported,