diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c index 8205799e6db3..c93918b70d03 100644 --- a/drivers/usb/dwc2/core_intr.c +++ b/drivers/usb/dwc2/core_intr.c @@ -71,6 +71,26 @@ static const char *dwc2_op_state_str(struct dwc2_hsotg *hsotg) } } +/** + * dwc2_handle_usb_port_intr - handles OTG PRTINT interrupts. + * When the PRTINT interrupt fires, there are certain status bits in the Host + * Port that needs to get cleared. + * + * @hsotg: Programming view of DWC_otg controller + */ +static void dwc2_handle_usb_port_intr(struct dwc2_hsotg *hsotg) +{ + u32 hprt0 = readl(hsotg->regs + HPRT0); + + if (hprt0 & HPRT0_ENACHG) { + hprt0 &= ~HPRT0_ENA; + writel(hprt0, hsotg->regs + HPRT0); + } + + /* Clear interrupt */ + writel(GINTSTS_PRTINT, hsotg->regs + GINTSTS); +} + /** * dwc2_handle_mode_mismatch_intr() - Logs a mode mismatch warning message * @@ -479,9 +499,8 @@ irqreturn_t dwc2_handle_common_intr(int irq, void *dev) if (dwc2_is_device_mode(hsotg)) { dev_dbg(hsotg->dev, " --Port interrupt received in Device mode--\n"); - gintsts = GINTSTS_PRTINT; - writel(gintsts, hsotg->regs + GINTSTS); - retval = 1; + dwc2_handle_usb_port_intr(hsotg); + retval = IRQ_HANDLED; } }