瀏覽代碼

usb: xhci: dwc3: Adding reset delay requirement as per dwc3 databook

As per dwc3 databook, delay is required before taking the core out of reset.
This delay is required so that the PHY are stable, and then we can take core
out of reset.

Reference is taken from linux dwc3 code, file: drivers/usb/dwc3/core.c.

Signed-off-by: Sriram Dash <sriram.dash@freescale.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@freescale.com>
Rajesh Bhagat 9 年之前
父節點
當前提交
5955bb9345
共有 1 個文件被更改,包括 2 次插入0 次删除
  1. 2 0
      drivers/usb/host/xhci-dwc3.c

+ 2 - 0
drivers/usb/host/xhci-dwc3.c

@@ -44,6 +44,8 @@ void dwc3_core_soft_reset(struct dwc3 *dwc3_reg)
 	/* reset USB3 phy - if required */
 	dwc3_phy_reset(dwc3_reg);
 
+	mdelay(100);
+
 	/* After PHYs are stable we can take Core out of reset state */
 	clrbits_le32(&dwc3_reg->g_ctl, DWC3_GCTL_CORESOFTRESET);
 }