linux-kernel - [PATCH v2 2/2] arm64: dts: qcom: msm8939-asus-z00t: add hall sensor

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Message-Id: <20251121-battery-hall-v2-2-d29e0828f214@gmail.com>
Date: Fri, 21 Nov 2025 01:10:49 +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 v2 2/2] arm64: dts: qcom: msm8939-asus-z00t: add hall
 sensor

This device uses ANPEC APX9131 hall sensor. It is a basic GPIO hall
sensor for which a generic "gpio-keys" device tree node configuration
suffices.

Signed-off-by: Erikas Bitovtas <xerikasxx@...il.com>
---
 arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts b/arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts
index b58f0a04abfd..7343fb00f986 100644
--- a/arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts
+++ b/arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts
@@ -46,7 +46,7 @@ chosen {
 	gpio-keys {
 		compatible = "gpio-keys";
 
-		pinctrl-0 = <&gpio_keys_default>;
+		pinctrl-0 = <&gpio_hall_sensor_default>, <&gpio_keys_default>;
 		pinctrl-names = "default";
 
 		button-volume-up {
@@ -62,6 +62,15 @@ button-volume-down {
 			linux,code = <KEY_VOLUMEDOWN>;
 			debounce-interval = <15>;
 		};
+
+		event-hall-sensor {
+			label = "Hall Effect Sensor";
+			gpios = <&tlmm 108 GPIO_ACTIVE_LOW>;
+			linux,input-type = <EV_SW>;
+			linux,code = <SW_LID>;
+			linux,can-disable;
+			debounce-interval = <150>;
+		};
 	};
 
 	reg_sd_vmmc: regulator-sdcard-vmmc {
@@ -265,6 +274,13 @@ gpio_keys_default: gpio-keys-default-state {
 		bias-pull-up;
 	};
 
+	gpio_hall_sensor_default: gpio-hall-sensor-default-state {
+		pins = "gpio108";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-pull-up;
+	};
+
 	usb_id_default: usb-id-default-state {
 		pins = "gpio110";
 		function = "gpio";

-- 
2.52.0