ARM: dts: imx: b650v3: Calibrate USB PHY to pass eye diagram test

Calibrate the USB PHY TX settings to pass the eye diagram signal
integrity test.  The settings are taken from the i.MX6 reference
manual's recommended configuration for USB certification (66.2.6).

Signed-off-by: Jaret Cantu <jaret.cantu@timesys.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/imx6q-b650v3.dts b/arch/arm/boot/dts/imx6q-b650v3.dts
index d853887..1dcaee2 100644 (file)
--- a/arch/arm/boot/dts/imx6q-b650v3.dts
+++ b/arch/arm/boot/dts/imx6q-b650v3.dts
@@ -98,3 +98,9 @@
                line-name = "PCA9539-P05";
        };
 };
+
+&usbphy1 {
+       fsl,tx-cal-45-dn-ohms = <55>;
+       fsl,tx-cal-45-dp-ohms = <55>;
+       fsl,tx-d-cal = <100>;
+};