linux-kernel - [PATCH 1/2] arm64: dts: qcom: msm8939-asus-z00t: add battery

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Message-Id: <20251115-battery-hall-v1-1-1586283d17c7@gmail.com>
Date: Sat, 15 Nov 2025 14:26:43 +0200
From: Erikas Bitovtas <xerikasxx@...il.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: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht, 
 Erikas Bitovtas <xerikasxx@...il.com>
Subject: [PATCH 1/2] arm64: dts: qcom: msm8939-asus-z00t: add battery

This device tracks remaining battery capacity percentage using voltage
mode BMS. This commit enables the pm8916_bms node and adds a battery
node to track its capacity. Battery properties were taken from the
downstream code and from the information printed on the battery itself.

Signed-off-by: Erikas Bitovtas <xerikasxx@...il.com>
---
 arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts b/arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts
index ebb548e62e02..b58f0a04abfd 100644
--- a/arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts
+++ b/arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts
@@ -20,6 +20,25 @@ aliases {
 		serial0 = &blsp_uart2;
 	};
 
+	battery: battery {
+		compatible = "simple-battery";
+		device-chemistry = "lithium-ion-polymer";
+		voltage-min-design-microvolt = <3400000>;
+		voltage-max-design-microvolt = <4400000>;
+		energy-full-design-microwatt-hours = <11500000>;
+		charge-full-design-microamp-hours = <3000000>;
+
+		ocv-capacity-celsius = <25>;
+		ocv-capacity-table-0 = <4372000 100>, <4306000 95>, <4247000 90>,
+			<4190000 85>, <4134000 80>, <4081000 75>, <4030000 70>,
+			<3984000 65>, <3930000 60>, <3884000 55>, <3850000 50>,
+			<3826000 45>, <3804000 40>, <3786000 35>, <3770000 30>,
+			<3753000 25>, <3734000 20>, <3712000 16>, <3693000 13>,
+			<3686000 11>, <3684000 10>, <3682000 9>, <3680000 8>,
+			<3676000 7>, <3668000 6>, <3643000 5>, <3600000 4>,
+			<3542000 3>, <3462000 2>, <3340000 1>, <3000000 0>;
+	};
+
 	chosen {
 		stdout-path = "serial0";
 	};
@@ -135,6 +154,12 @@ &mpss_mem {
 	reg = <0x0 0x86800000 0x0 0x5500000>;
 };
 
+&pm8916_bms {
+	monitored-battery = <&battery>;
+
+	status = "okay";
+};
+
 &pm8916_codec {
 	qcom,micbias-lvl = <2800>;
 	qcom,mbhc-vthreshold-low = <75 150 237 450 500>;

-- 
2.51.2