linux-kernel - [PATCH 1/2] dt-bindings: phy: imx8mq-usb: add phy tuning properties

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Date:   Wed,  5 Apr 2023 13:21:17 +0200
From:   Johannes Zink <j.zink@...gutronix.de>
To:     vkoul@...nel.org, kishon@...nel.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-imx@....com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, jun.li@....com,
        haibo.chen@....com, linux-phy@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     j.zink@...gutronix.de
Subject: [PATCH 1/2] dt-bindings: phy: imx8mq-usb: add phy tuning properties

Add optional properties for tuning of usb phy.

Signed-off-by: Johannes Zink <j.zink@...gutronix.de>
---
 .../bindings/phy/fsl,imx8mq-usb-phy.yaml      | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml b/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
index e6f9f5540cc3..f452a41b4f32 100644
--- a/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
@@ -35,6 +35,46 @@ properties:
     description:
       A phandle to the regulator for USB VBUS.
 
+  fsl,phy-tx-vref-tune:
+    description:
+      HS DC Voltage level adjustment
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]
+
+  fsl,phy-tx-rise-tune:
+    description:
+      HS Transmitter Rise/Fall Time Adjustment
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1, 2, 3]
+
+  fsl,phy-tx-preemp-amp-tune:
+    description:
+      HS Transmitter Pre-Emphasis Current Control
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1, 2, 3]
+
+  fsl,phy-tx-vboost-level:
+    description:
+      TX Voltage Boost Level
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 2, 3]
+
+  fsl,phy-comp-dis-tune:
+    description:
+      Disconnect Threshold Adjustment
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1, 2, 3, 4, 5, 6, 7]
+
+  fsl,phy-pcs-tx-deemph-3p5db:
+    description:
+      TX De-Emphasis at 3.5 dB
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  fsl,phy-pcs-tx-swing-full:
+    description:
+      TX Amplitude
+    $ref: /schemas/types.yaml#/definitions/uint32
+
 required:
   - compatible
   - reg
-- 
2.39.2