drivers: usb: fsl: Implement Erratum A-009116 for XHCI controller

This adjusts (micro)frame length to appropriate value thus
avoiding USB devices to time out over a longer run

Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
diff --git a/drivers/usb/host/xhci-dwc3.c b/drivers/usb/host/xhci-dwc3.c
index 67147cb..c722c50 100644
--- a/drivers/usb/host/xhci-dwc3.c
+++ b/drivers/usb/host/xhci-dwc3.c
@@ -89,3 +89,9 @@
 
 	return 0;
 }
+
+void dwc3_set_fladj(struct dwc3 *dwc3_reg, u32 val)
+{
+	setbits_le32(&dwc3_reg->g_fladj, GFLADJ_30MHZ_REG_SEL |
+			GFLADJ_30MHZ(val));
+}
diff --git a/drivers/usb/host/xhci-fsl.c b/drivers/usb/host/xhci-fsl.c
index 385422a..6781b94 100644
--- a/drivers/usb/host/xhci-fsl.c
+++ b/drivers/usb/host/xhci-fsl.c
@@ -58,6 +58,9 @@
 	/* We are hard-coding DWC3 core to Host Mode */
 	dwc3_set_mode(fsl_xhci->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
 
+	/* Set GFLADJ_30MHZ as 20h as per XHCI spec default value */
+	dwc3_set_fladj(fsl_xhci->dwc3_reg, GFLADJ_30MHZ_DEFAULT);
+
 	return ret;
 }