linux-kernel - [PATCH v2 0/2] arm64: dts: qcom: switch RB1 and RB2 platforms to i2c2-gpio

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Message-Id: <20240605-rb12-i2c2g-pio-v2-0-946f5d6b6948@linaro.org>
Date: Wed, 05 Jun 2024 11:55:55 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Caleb Connolly <caleb.connolly@...aro.org>, 
 Alexey Klimov <alexey.klimov@...aro.org>, linux-arm-msm@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, stable@...r.kernel.org
Subject: [PATCH v2 0/2] arm64: dts: qcom: switch RB1 and RB2 platforms to
 i2c2-gpio

On the Qualcomm RB1 and RB2 platforms the I2C bus connected to the
LT9611UXC bridge under some circumstances can go into a state when all
transfers timeout. This causes both issues with fetching of EDID and
with updating of the bridge's firmware.

While we are debugging the issue, switch corresponding I2C bus to use
i2c-gpio driver. While using i2c-gpio no communication issues are
observed.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
Changes in v2:
- Fixed i2c node names to fix DT validation issues (Rob)
- Link to v1: https://lore.kernel.org/r/20240604-rb12-i2c2g-pio-v1-0-f323907179d9@linaro.org

---
Dmitry Baryshkov (2):
      arm64: dts: qcom: qrb2210-rb1: switch I2C2 to i2c-gpio
      arm64: dts: qcom: qrb4210-rb2: switch I2C2 to i2c-gpio

 arch/arm64/boot/dts/qcom/qrb2210-rb1.dts | 13 ++++++++++++-
 arch/arm64/boot/dts/qcom/qrb4210-rb2.dts | 13 ++++++++++++-
 2 files changed, 24 insertions(+), 2 deletions(-)
---
base-commit: 0e1980c40b6edfa68b6acf926bab22448a6e40c9
change-id: 20240604-rb12-i2c2g-pio-f6035fa8e022

Best regards,
-- 
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>