linux-kernel - [PATCH v2] arm64: dts: qcom: qrb4210-rb2: make L9A always-on

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Message-Id: <20240605-rb2-l9a-aon-v2-1-0d493d0d107c@linaro.org>
Date: Wed, 05 Jun 2024 12:00:49 +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: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: [PATCH v2] arm64: dts: qcom: qrb4210-rb2: make L9A always-on

The L9A regulator is used to further control voltage regulators on the
board. It can be used to disable VBAT_mains, 1.8V, 3.3V, 5V rails). Make
sure that is stays always on to prevent undervolting of these volage
rails.

Fixes: 8d58a8c0d930 ("arm64: dts: qcom: Add base qrb4210-rb2 board dts")
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
Changes in v2:
- Expand commit message to mention the affected voltage rails (Bryan)
- Link to v1: https://lore.kernel.org/r/20240603-rb2-l9a-aon-v1-1-81c35a0de43d@linaro.org
---
 arch/arm64/boot/dts/qcom/qrb4210-rb2.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
index 2c39bb1b97db..e0c14d23b909 100644
--- a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
+++ b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
@@ -403,6 +403,8 @@ vreg_l9a_1p8: l9 {
 			regulator-min-microvolt = <1800000>;
 			regulator-max-microvolt = <1800000>;
 			regulator-allow-set-load;
+			regulator-always-on;
+			regulator-boot-on;
 		};
 
 		vreg_l10a_1p8: l10 {

---
base-commit: 0e1980c40b6edfa68b6acf926bab22448a6e40c9
change-id: 20240603-rb2-l9a-aon-d1292bad5aaa

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