usb: dwc2: Add partial power down exit flow in wakeup intr.

According to programming guide added host partial power
down exit flow in wakeup detected interrupt handler.

Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210408094454.5BBCBA0094@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c
index 1fb957c..0a7f933 100644 (file)
--- a/drivers/usb/dwc2/core_intr.c
+++ b/drivers/usb/dwc2/core_intr.c
@@ -423,15 +423,14 @@ static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg)
                        hsotg->lx_state = DWC2_L0;
                }
        } else {
-               if (hsotg->params.power_down)
-                       return;
-
-               if (hsotg->lx_state != DWC2_L1) {
-                       u32 pcgcctl = dwc2_readl(hsotg, PCGCTL);
-
-                       /* Restart the Phy Clock */
-                       pcgcctl &= ~PCGCTL_STOPPCLK;
-                       dwc2_writel(hsotg, pcgcctl, PCGCTL);
+               if (hsotg->lx_state == DWC2_L2) {
+                       if (hsotg->in_ppd) {
+                               ret = dwc2_exit_partial_power_down(hsotg, 1,
+                                                                  true);
+                               if (ret)
+                                       dev_err(hsotg->dev,
+                                               "exit partial_power_down failed\n");
+                       }
 
                        /*
                         * If we've got this quirk then the PHY is stuck upon