Messages in this thread Patch in this message | | | Date | Fri, 16 Apr 2021 16:47:38 +0400 | From | Artur Petrosyan <> | Subject | [PATCH v2 07/15] usb: dwc2: Clear GINTSTS_RESTOREDONE bit after restore is generated. |
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When hibernation exit is performed the dwc2_hib_restore_common() function is called. In that function we wait until GINTSTS_RESTOREDONE bit is set. However, after the setting of that bit we get a lot of (dwc2_hsotg_irq:) interrupts which indicates that (GINTSTS.RstrDoneInt) restore done interrupt is asserted.
To avoid restore done interrupt storm after restore is generated clear GINTSTS_RESTOREDONE bit in GINTSTS register.
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com> Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com> --- drivers/usb/dwc2/core.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c index eccd96fa164e..576c262dba55 100644 --- a/drivers/usb/dwc2/core.c +++ b/drivers/usb/dwc2/core.c @@ -299,6 +299,12 @@ void dwc2_hib_restore_common(struct dwc2_hsotg *hsotg, int rem_wakeup, __func__); } else { dev_dbg(hsotg->dev, "restore done generated here\n"); + + /* + * To avoid restore done interrupt storm after restore is + * generated clear GINTSTS_RESTOREDONE bit. + */ + dwc2_writel(hsotg, GINTSTS_RESTOREDONE, GINTSTS); } } -- 2.25.1
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