[PATCH] ARM: dts: imx: b650v3: Calibrate USB PHY to pass eye diagram test
Jaret Cantu
jaret.cantu at timesys.com
Wed Sep 14 14:14:49 PDT 2016
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 at timesys.com>
---
arch/arm/boot/dts/imx6q-b650v3.dts | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/arm/boot/dts/imx6q-b650v3.dts b/arch/arm/boot/dts/imx6q-b650v3.dts
index 33cb71a..c266bd2 100644
--- a/arch/arm/boot/dts/imx6q-b650v3.dts
+++ b/arch/arm/boot/dts/imx6q-b650v3.dts
@@ -89,3 +89,9 @@
};
};
};
+
+&usbphy1 {
+ fsl,tx-cal-45-dn-ohms = <55>;
+ fsl,tx-cal-45-dp-ohms = <55>;
+ fsl,tx-d-cal = <100>;
+};
--
1.7.10.4
More information about the linux-arm-kernel
mailing list