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usb: dwc2: Add hibernation entering flow by system suspend

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

Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210416124811.BBFDBA005C@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Artur Petrosyan 2021-04-16 16:48:10 +04:00 committed by Greg Kroah-Hartman
parent c3595df7a6
commit 755d0effeb
1 changed files with 10 additions and 0 deletions
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10
drivers/usb/dwc2/hcd.c
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@ -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,