linux-kernel - [PATCH AUTOSEL 6.6 04/18] dt-bindings: phy: qcom,snps-eusb2-repeater: Add magic tuning overrides

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Message-ID: <20231107232231.3775605-4-sashal@kernel.org>
Date:   Tue,  7 Nov 2023 18:21:58 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Sasha Levin <sashal@...nel.org>, agross@...nel.org,
        andersson@...nel.org, kishon@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        abel.vesa@...aro.org, linux-arm-msm@...r.kernel.org,
        linux-phy@...ts.infradead.org, devicetree@...r.kernel.org
Subject: [PATCH AUTOSEL 6.6 04/18] dt-bindings: phy: qcom,snps-eusb2-repeater: Add magic tuning overrides

From: Konrad Dybcio <konrad.dybcio@...aro.org>

[ Upstream commit c20b59b2996c89c4f072c3312e6210528a298330 ]

The EUSB2 repeater requires some alterations to its init sequence,
depending on board design.

Add support for making the necessary changes to that sequence to make USB
functional on SM8550-based Xperia 1 V.

They all have lackluster description due to lack of information.

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
Acked-by: Rob Herring <robh@...nel.org>
Link: https://lore.kernel.org/r/20230830-topic-eusb2_override-v2-1-7d8c893d93f6@linaro.org
Signed-off-by: Vinod Koul <vkoul@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 .../phy/qcom,snps-eusb2-repeater.yaml         | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/qcom,snps-eusb2-repeater.yaml b/Documentation/devicetree/bindings/phy/qcom,snps-eusb2-repeater.yaml
index 029569d5fcf35..24c733c10e0e9 100644
--- a/Documentation/devicetree/bindings/phy/qcom,snps-eusb2-repeater.yaml
+++ b/Documentation/devicetree/bindings/phy/qcom,snps-eusb2-repeater.yaml
@@ -32,6 +32,27 @@ properties:
 
   vdd3-supply: true
 
+  qcom,tune-usb2-disc-thres:
+    $ref: /schemas/types.yaml#/definitions/uint8
+    description: High-Speed disconnect threshold
+    minimum: 0
+    maximum: 7
+    default: 0
+
+  qcom,tune-usb2-amplitude:
+    $ref: /schemas/types.yaml#/definitions/uint8
+    description: High-Speed trasmit amplitude
+    minimum: 0
+    maximum: 15
+    default: 8
+
+  qcom,tune-usb2-preem:
+    $ref: /schemas/types.yaml#/definitions/uint8
+    description: High-Speed TX pre-emphasis tuning
+    minimum: 0
+    maximum: 7
+    default: 5
+
 required:
   - compatible
   - reg
-- 
2.42.0