linux-kernel - [PATCH 0/2] Fix tuning on eUSB2 repeater

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Message-Id: <20250616-eusb2-repeater-tuning-v1-0-9457ff0fbf75@fairphone.com>
Date: Mon, 16 Jun 2025 11:45:10 +0200
From: Luca Weiss <luca.weiss@...rphone.com>
To: Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Abel Vesa <abel.vesa@...aro.org>, 
 Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Luca Weiss <luca.weiss@...rphone.com>
Subject: [PATCH 0/2] Fix tuning on eUSB2 repeater

Update the dt-bindings to remove the 'default' tuning values, since they
depend on the PMIC and are not guaranteed to be the same.

And add a fix into the driver to not zero-out all tuning registers if
they are not specified in the "init sequence", since zero is not the
reset value for most parameter and will lead to very unexpected tuning.

Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
---
Luca Weiss (2):
      dt-bindings: phy: qcom,snps-eusb2-repeater: Remove default tuning values
      phy: qualcomm: phy-qcom-eusb2-repeater: Don't zero-out registers

 .../bindings/phy/qcom,snps-eusb2-repeater.yaml     |  3 --
 drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c     | 63 +++++++++++-----------
 2 files changed, 32 insertions(+), 34 deletions(-)
---
base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494
change-id: 20250616-eusb2-repeater-tuning-f56331c6b1fa

Best regards,
-- 
Luca Weiss <luca.weiss@...rphone.com>