linux-kernel - [PATCH] arm64: dts: qcom: x1e80100-romulus: Keep L12B and L15B always on

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Message-Id: <20250304-topic-sl7_vregs_aon-v1-1-b2dc706e4157@oss.qualcomm.com>
Date: Tue, 04 Mar 2025 18:10:46 +0100
From: Konrad Dybcio <konradybcio@...nel.org>
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: Marijn Suijten <marijn.suijten@...ainline.org>, 
 Konrad Dybcio <quic_kdybcio@...cinc.com>, linux-arm-msm@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Konrad Dybcio <konrad.dybcio@....qualcomm.com>, 
 Johan Hovold <johan+linaro@...nel.org>
Subject: [PATCH] arm64: dts: qcom: x1e80100-romulus: Keep L12B and L15B
 always on

From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

These regulators power some electronic components onboard. They're
most likely kept online by other pieces of firmware, but you can never
be sure enough.

Fixes: 09d77be56093 ("arm64: dts: qcom: Add support for X1-based Surface Laptop 7 devices")
Reported-by: Johan Hovold <johan+linaro@...nel.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi b/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
index 5867953c73564ca7ae1279b73f6834aa1d732792..6a883fafe3c77a45e045beba8357d67caa88dabf 100644
--- a/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
@@ -510,6 +510,7 @@ vreg_l12b: ldo12 {
 			regulator-min-microvolt = <1200000>;
 			regulator-max-microvolt = <1200000>;
 			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
+			regulator-always-on;
 		};
 
 		vreg_l13b: ldo13 {
@@ -531,6 +532,7 @@ vreg_l15b: ldo15 {
 			regulator-min-microvolt = <1800000>;
 			regulator-max-microvolt = <1800000>;
 			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
+			regulator-always-on;
 		};
 
 		vreg_l16b: ldo16 {

---
base-commit: 20d5c66e1810e6e8805ec0d01373afb2dba9f51a
change-id: 20250304-topic-sl7_vregs_aon-1201ee52ce83

Best regards,
-- 
Konrad Dybcio <konrad.dybcio@....qualcomm.com>