From 7cc10fe915491ec1548cb03317ffdb9e2b534824 Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Wed, 4 Feb 2015 16:20:33 +0800 Subject: MLK-10202-2 doc: usb: mxs-phy: add tx-d-cal property Add tx-d-cal property Signed-off-by: Peter Chen (cherry picked from commit ebb97b3d3ca99516d3daac09813ae480de2adffe) --- Documentation/devicetree/bindings/phy/mxs-usb-phy.txt | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'Documentation/devicetree/bindings/phy') diff --git a/Documentation/devicetree/bindings/phy/mxs-usb-phy.txt b/Documentation/devicetree/bindings/phy/mxs-usb-phy.txt index 1d25b04cd05e..5d6303014470 100644 --- a/Documentation/devicetree/bindings/phy/mxs-usb-phy.txt +++ b/Documentation/devicetree/bindings/phy/mxs-usb-phy.txt @@ -21,6 +21,9 @@ Optional properties: that terminates the DP output signal. Default: 45 - fsl,tx-d-cal: Integer [79-119]. Current trimming value (as a percentage) of the 17.78mA TX reference current. Default: 100 +- tx-d-cal: Try to adjust this value to improve signal quality, and pass + USB Certification, the value is from 0x0 to 0xf, and the register offset + is 0x10 (USBPHY_TX). Example: usbphy1: usbphy@020c9000 { @@ -28,4 +31,5 @@ usbphy1: usbphy@020c9000 { reg = <0x020c9000 0x1000>; interrupts = <0 44 0x04>; fsl,anatop = <&anatop>; + tx-d-cal = <0x5>; }; -- cgit v1.2.3