usb: dwc2: gadget: enable WKUP_ALERT interrupt

WKUP_ALERT interrupt should be unmask when lpm mode is enabled.

This interrupt is asserted when the device is in L1 for the duration
mentioned in GREFCLK.SOF_CNN_WKUP_ALERT. This is used to alert SW to
initiate Remote wake up so that the device resumes in time in order not
to lose sync with the host frame number.

Acked-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index e8dd6897e2c37e0f18d4e942a2f83d2f3b2d0861..24bd9fdabc6708d2074735a3cc3c99bcb38fc490 100644 (file)
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -5003,6 +5003,10 @@ void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg)
        val |= hsotg->params.besl ? GLPMCFG_ENBESL : 0;
        dwc2_writel(hsotg, val, GLPMCFG);
        dev_dbg(hsotg->dev, "GLPMCFG=0x%08x\n", dwc2_readl(hsotg, GLPMCFG));
+
+       /* Unmask WKUP_ALERT Interrupt */
+       if (hsotg->params.service_interval)
+               dwc2_set_bit(hsotg, GINTMSK2, GINTMSK2_WKUP_ALERT_INT_MSK);
 }
 
 /**