From 074d6512aa56b11aaa1d54098a95bf1cc70a3a47 Mon Sep 17 00:00:00 2001
From: Jack Pham <jackp@quicinc.com>
Date: Wed, 29 Jan 2020 18:57:40 -0800
Subject: [PATCH] dt-bindings: usb: Add super speed re-driver bindings

Add bindings for super speed re-driver driver. This driver will
be used to boost USB Superspeed signals on QRD boards.

Change-Id: Ieae6a7b830ac6b3728228abee13fe5ed46e1e3cf
---
 bindings/usb/onsemi_redriver.txt | 53 ++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 bindings/usb/onsemi_redriver.txt

diff --git a/bindings/usb/onsemi_redriver.txt b/bindings/usb/onsemi_redriver.txt
new file mode 100644
index 000000000000..4c834a896bd8
--- /dev/null
+++ b/bindings/usb/onsemi_redriver.txt
@@ -0,0 +1,53 @@
+ON Semiconductor USB Type-C and display port 10Gbps Linear Re-Driver
+
+Required properties:
+- compatible: Must be "onnn,redriver".
+- reg: I2C address on the selected bus.
+- extcon: phandles to external connector devices. The first phandle
+	should point to the external connector which provides
+	both "USB" cable events and "USB-HOST" cable events.
+	An optional second phandle may be specified for DP
+	lane events.
+
+Optional properties:
+- eq: Equalization value of re-driver channel A/B/C/D, 8 bit.
+	eq[0] - eq[3]: Channel A-D parameter for USB.
+	eq[4] - eq[7]: Channel A-D parameter for DP.
+- flat-gain: Flat gain control value of re-driver channel A/B/C/D, 8 bit.
+	flat_gain[0] - flat_gain[3]: Channel A-D parameter for USB.
+	flat_gain[4] - flat_gain[7]: Channel A-D parameter for DP.
+- output-comp: Output compression value of re-driver channel A/B/C/D,
+8 bit.
+	output_comp[0] - output_comp[3]: Channel A-D parameter for USB.
+	output_comp[4] - output_comp[7]: Channel A-D parameter for DP.
+- loss-match: Loss profile matching control value of re-driver channel
+A/B/C/D, 8 bit.
+	loss_match[0] - loss_match[3]: Channel A-D parameter for USB.
+	loss_match[4] - loss_match[7]: Channel A-D parameter for DP.
+
+Example:
+	redriver@19 {
+		compatible = "onnn,redriver";
+		reg = <0x19>;
+		extcon = <&pm8150b_pdphy>, <&pm8150b_pdphy>;
+		eq = /bits/ 8 <
+				/* Parameters for USB */
+				0x4 0x4 0x4 0x4
+				/* Parameters for DP */
+				0x6 0x4 0x4 0x6>;
+		flat-gain = /bits/ 8 <
+				/* Parameters for USB */
+				0x3 0x1 0x1 0x3
+				/* Parameters for DP */
+				0x2 0x1 0x1 0x2>;
+		output-comp = /bits/ 8 <
+				/* Parameters for USB */
+				0x3 0x3 0x3 0x3
+				/* Parameters for DP */
+				0x3 0x3 0x3 0x3>;
+		loss-match = /bits/ 8 <
+				/* Parameters for USB */
+				0x1 0x3 0x3 0x1
+				/* Parameters for DP */
+				0x3 0x3 0x3 0x3>;
+	};