linux-kernel - [PATCH 1/2] arm64: dts: qcom: monaco-evk: Enable GPIO expander interrupt for Monaco EVK

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Message-Id: <20260210155329.3044455-2-swati.agarwal@oss.qualcomm.com>
Date: Tue, 10 Feb 2026 21:23:28 +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: monaco-evk: Enable GPIO expander interrupt for Monaco EVK

Enable PCA9538 expander as interrupt controller on Monaco EVK and configure
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/monaco-evk.dts | 77 +++++++++++++++++++++++++
 1 file changed, 77 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/monaco-evk.dts b/arch/arm64/boot/dts/qcom/monaco-evk.dts
index 565418b86b2a..03af9bbcacc9 100644
--- a/arch/arm64/boot/dts/qcom/monaco-evk.dts
+++ b/arch/arm64/boot/dts/qcom/monaco-evk.dts
@@ -362,6 +362,11 @@ expander0: gpio@38 {
 		reg = <0x38>;
 		#gpio-cells = <2>;
 		gpio-controller;
+		#interrupt-cells = <2>;
+		interrupt-controller;
+		interrupts-extended = <&tlmm 56 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-0 = <&expander0_int>;
+		pinctrl-names = "default";
 	};
 
 	expander1: gpio@39 {
@@ -369,6 +374,11 @@ expander1: gpio@39 {
 		reg = <0x39>;
 		#gpio-cells = <2>;
 		gpio-controller;
+		#interrupt-cells = <2>;
+		interrupt-controller;
+		interrupts-extended = <&tlmm 16 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-0 = <&expander1_int>;
+		pinctrl-names = "default";
 	};
 
 	expander2: gpio@3a {
@@ -376,6 +386,11 @@ expander2: gpio@3a {
 		reg = <0x3a>;
 		#gpio-cells = <2>;
 		gpio-controller;
+		#interrupt-cells = <2>;
+		interrupt-controller;
+		interrupts-extended = <&tlmm 95 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-0 = <&expander2_int>;
+		pinctrl-names = "default";
 	};
 
 	expander3: gpio@3b {
@@ -383,6 +398,11 @@ expander3: gpio@3b {
 		reg = <0x3b>;
 		#gpio-cells = <2>;
 		gpio-controller;
+		#interrupt-cells = <2>;
+		interrupt-controller;
+		interrupts-extended = <&tlmm 24 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-0 = <&expander3_int>;
+		pinctrl-names = "default";
 	};
 
 	expander4: gpio@3c {
@@ -390,6 +410,11 @@ expander4: gpio@3c {
 		reg = <0x3c>;
 		#gpio-cells = <2>;
 		gpio-controller;
+		#interrupt-cells = <2>;
+		interrupt-controller;
+		interrupts-extended = <&tlmm 96 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-0 = <&expander4_int>;
+		pinctrl-names = "default";
 	};
 
 	expander5: gpio@3d {
@@ -397,6 +422,11 @@ expander5: gpio@3d {
 		reg = <0x3d>;
 		#gpio-cells = <2>;
 		gpio-controller;
+		#interrupt-cells = <2>;
+		interrupt-controller;
+		interrupts-extended = <&tlmm 3 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-0 = <&expander5_int>;
+		pinctrl-names = "default";
 	};
 
 	expander6: gpio@3e {
@@ -404,6 +434,11 @@ expander6: gpio@3e {
 		reg = <0x3e>;
 		#gpio-cells = <2>;
 		gpio-controller;
+		#interrupt-cells = <2>;
+		interrupt-controller;
+		interrupts-extended = <&tlmm 52 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-0 = <&expander6_int>;
+		pinctrl-names = "default";
 	};
 };
 
@@ -495,6 +530,48 @@ tpm@0 {
 
 &tlmm {
 
+	expander0_int: expander0-int-state {
+		pins = "gpio56";
+		function = "gpio";
+		bias-pull-up;
+	};
+
+	expander1_int: expander1-int-state {
+		pins = "gpio16";
+		function = "gpio";
+		bias-pull-up;
+	};
+
+	expander2_int: expander2-int-state {
+		pins = "gpio95";
+		function = "gpio";
+		bias-pull-up;
+	};
+
+	expander3_int: expander3-int-state {
+		pins = "gpio24";
+		function = "gpio";
+		bias-pull-up;
+	};
+
+	expander4_int: expander4-int-state {
+		pins = "gpio96";
+		function = "gpio";
+		bias-pull-up;
+	};
+
+	expander5_int: expander5-int-state {
+		pins = "gpio3";
+		function = "gpio";
+		bias-pull-up;
+	};
+
+	expander6_int:  expander6-int-state {
+		pins = "gpio52";
+		function = "gpio";
+		bias-pull-up;
+	};
+
 	pcie0_default_state: pcie0-default-state {
 		wake-pins {
 			pins = "gpio0";
-- 
2.34.1