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Message-Id: <20251208-b4-battery-hall-v3-1-84e2157705a4@gmail.com>
Date: Mon, 08 Dec 2025 16:59:20 +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,
phone-devel@...r.kernel.org, Erikas Bitovtas <xerikasxx@...il.com>
Subject: [PATCH v3 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
information printed on the battery itself and downstream device tree
for a battery named "nvt+atl_3000mah" [1]
[1] https://github.com/Asus-MSM8916/android_kernel_asus_msm8916/blob/10.x/arch/arm/boot/dts/qcom/ASUS_ZE550KL_1936167_3000mAh_3p4COV_VBMS_Final.dtsi
Signed-off-by: Erikas Bitovtas <xerikasxx@...il.com>
---
arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts | 61 ++++++++++++++++++++++++++
1 file changed, 61 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..d0f0f80dd326 100644
--- a/arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts
+++ b/arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts
@@ -20,6 +20,61 @@ 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 = <(-20) 0 25 40 60>;
+ ocv-capacity-table-0 = <4378000 100>, <4220000 95>, <4125000 90>,
+ <4071000 85>, <3977000 80>, <3916000 75>, <3866000 70>,
+ <3838000 65>, <3822000 60>, <3809000 55>, <3797000 50>,
+ <3784000 45>, <3771000 40>, <3757000 35>, <3743000 30>,
+ <3726000 25>, <3707000 20>, <3688000 16>, <3670000 13>,
+ <3655000 11>, <3648000 10>, <3636000 9>, <3624000 8>,
+ <3612000 7>, <3592000 6>, <3569000 5>, <3540000 4>,
+ <3494000 3>, <3418000 2>, <3289000 1>, <3000000 0>;
+
+ ocv-capacity-table-1 = <4378000 100>, <4292000 95>, <4226000 90>,
+ <4166000 85>, <4109000 80>, <4064000 75>, <3992000 70>,
+ <3942000 65>, <3898000 60>, <3859000 55>, <3826000 50>,
+ <3802000 45>, <3788000 40>, <3779000 35>, <3768000 30>,
+ <3752000 25>, <3732000 20>, <3712000 16>, <3696000 13>,
+ <3688000 11>, <3684000 10>, <3680000 9>, <3675000 8>,
+ <3669000 7>, <3658000 6>, <3636000 5>, <3599000 4>,
+ <3544000 3>, <3466000 2>, <3341000 1>, <3000000 0>;
+
+ ocv-capacity-table-2 = <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>;
+
+ ocv-capacity-table-3 = <4365000 100>, <4304000 95>, <4246000 90>,
+ <4189000 85>, <4133000 80>, <4080000 75>, <4030000 70>,
+ <3985000 65>, <3933000 60>, <3886000 55>, <3852000 50>,
+ <3827000 45>, <3806000 40>, <3789000 35>, <3769000 30>,
+ <3746000 25>, <3726000 20>, <3706000 16>, <3688000 13>,
+ <3681000 11>, <3678000 10>, <3676000 9>, <3676000 8>,
+ <3672000 7>, <3660000 6>, <3634000 5>, <3588000 4>,
+ <3528000 3>, <3448000 2>, <3322000 1>, <3000000 0>;
+
+ ocv-capacity-table-4 = <4358000 100>, <4298000 95>, <4240000 90>,
+ <4183000 85>, <4128000 80>, <4076000 75>, <4027000 70>,
+ <3983000 65>, <3935000 60>, <3887000 55>, <3852000 50>,
+ <3827000 45>, <3806000 40>, <3789000 35>, <3764000 30>,
+ <3738000 25>, <3715000 20>, <3695000 16>, <3677000 13>,
+ <3672000 11>, <3669000 10>, <3667000 9>, <3666000 8>,
+ <3662000 7>, <3652000 6>, <3622000 5>, <3577000 4>,
+ <3518000 3>, <3440000 2>, <3321000 1>, <3000000 0>;
+ };
+
chosen {
stdout-path = "serial0";
};
@@ -135,6 +190,12 @@ &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>;
--
2.52.0
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