linux-kernel - [PATCH] arm64: dts: qcom: sdm630: fix gpu_speed

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Message-Id: <20251006-sdm630-fix-gpu-v1-1-44d69bdea59a@oss.qualcomm.com>
Date: Mon, 06 Oct 2025 01:16:59 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc: Konrad Dybcio <konradybcio@...il.com>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: qcom: sdm630: fix gpu_speed_bin size

Historically sdm630.dtsi has used 1 byte length for the gpu_speed_bin
cell, although it spans two bytes (offset 5, size 7 bits). It was being
accepted by the kernel because before the commit 7a06ef751077 ("nvmem:
core: fix bit offsets of more than one byte") the kernel didn't have
length check. After this commit nvmem core rejects QFPROM on sdm630 /
sdm660, making GPU and USB unusable on those platforms.

Set the size of the gpu_speed_bin cell to 2 bytes, fixing the parsing
error.

Fixes: b190fb010664 ("arm64: dts: qcom: sdm630: Add sdm630 dts file")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/sdm630.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm630.dtsi b/arch/arm64/boot/dts/qcom/sdm630.dtsi
index 8b1a45a4e56ed1ae02e5bb6e78ca6255d87add1c..21f7dcf60679026e45202c6ce137ca0463c00d0e 100644
--- a/arch/arm64/boot/dts/qcom/sdm630.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm630.dtsi
@@ -598,7 +598,7 @@ qusb2_hstx_trim: hstx-trim@240 {
 			};
 
 			gpu_speed_bin: gpu-speed-bin@...0 {
-				reg = <0x41a2 0x1>;
+				reg = <0x41a2 0x2>;
 				bits = <5 7>;
 			};
 		};

---
base-commit: bf2602a3cb2381fb1a04bf1c39a290518d2538d1
change-id: 20251004-sdm630-fix-gpu-f9786db8049a

Best regards,
-- 
With best wishes
Dmitry