linux-kernel - [PATCH 1/2] arm64: dts: qcom: lemans-evk: Enable GPIO expander3 interrupt for Lemans EVK

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Message-Id: <20260206104642.1038381-2-swati.agarwal@oss.qualcomm.com>
Date: Fri,  6 Feb 2026 16:16:41 +0530
From: Swati Agarwal <swati.agarwal@....qualcomm.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,
        Swati Agarwal <swati.agarwal@....qualcomm.com>
Subject: [PATCH 1/2] arm64: dts: qcom: lemans-evk: Enable GPIO expander3 interrupt for Lemans EVK

Enable PCA9538 expander3 as interrupt controller on Lemans EVK and
configures the corresponding TLMM pins via pinctrl to operate as GPIO
inputs with internal pull-ups.

Signed-off-by: Swati Agarwal <swati.agarwal@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/lemans-evk.dts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/lemans-evk.dts b/arch/arm64/boot/dts/qcom/lemans-evk.dts
index a549f7fe53a1..473cc2a81670 100644
--- a/arch/arm64/boot/dts/qcom/lemans-evk.dts
+++ b/arch/arm64/boot/dts/qcom/lemans-evk.dts
@@ -649,6 +649,12 @@ expander3: gpio@3b {
 		reg = <0x3b>;
 		#gpio-cells = <2>;
 		gpio-controller;
+		#interrupt-cells = <2>;
+		interrupt-controller;
+		interrupt-parent = <&tlmm>;
+		interrupts = <39 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&expander3_int>;
 	};
 
 	eeprom@50 {
@@ -894,6 +900,13 @@ ethernet0_mdio: ethernet0-mdio-pins {
 		};
 	};
 
+	expander3_int: expander3-int-state {
+		pins = "gpio39";
+		function = "gpio";
+		input-enable;
+		bias-pull-up;
+	};
+
 	pcie0_default_state: pcie0-default-state {
 		clkreq-pins {
 			pins = "gpio1";
-- 
2.34.1