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ARM: dts: imx: b650v3: Calibrate USB PHY to pass eye diagram test
authorJaret Cantu <jaret.cantu@timesys.com>
Wed, 14 Sep 2016 21:14:49 +0000 (17:14 -0400)
committerShawn Guo <shawnguo@kernel.org>
Sun, 23 Oct 2016 12:13:21 +0000 (20:13 +0800)
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>
arch/arm/boot/dts/imx6q-b650v3.dts patch | blob | blame | history

diff --git a/arch/arm/boot/dts/imx6q-b650v3.dts b/arch/arm/boot/dts/imx6q-b650v3.dts
index d853887254268aae304f3a90b244bef3cdc07990..1dcaee23ed9c2c13052617bc479ff7979269c513 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>;
+};