FROMLIST: arm64: dts: qcom: lemans-evk: Enable GPIO expander interrupt for Lemans EVK

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

Link: https://lore.kernel.org/all/20260210125348.2800846-2-swati.agarwal@oss.qualcomm.com/
Signed-off-by: Swati Agarwal <swati.agarwal@oss.qualcomm.com>

Author: swatagar

arch/arm64/boot/dts/qcom/lemans-evk.dts

@@ -651,27 +651,47 @@
 		reg = <0x38>;
 		#gpio-cells = <2>;
 		gpio-controller;
+		#interrupt-cells = <2>;
+		interrupt-controller;
+		interrupts-extended = <&tlmm 138 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-0 = <&expander0_int>;
+		pinctrl-names = "default";
 	};
 
 	expander1: gpio@39 {
 		compatible = "ti,tca9538";
 		reg = <0x39>;
 		#gpio-cells = <2>;
 		gpio-controller;
+		#interrupt-cells = <2>;
+		interrupt-controller;
+		interrupts-extended = <&tlmm 19 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-0 = <&expander1_int>;
+		pinctrl-names = "default";
 	};
 
 	expander2: gpio@3a {
 		compatible = "ti,tca9538";
 		reg = <0x3a>;
 		#gpio-cells = <2>;
 		gpio-controller;
+		#interrupt-cells = <2>;
+		interrupt-controller;
+		interrupts-extended = <&tlmm 139 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-0 = <&expander2_int>;
+		pinctrl-names = "default";
 	};
 
 	expander3: gpio@3b {
 		compatible = "ti,tca9538";
 		reg = <0x3b>;
 		#gpio-cells = <2>;
 		gpio-controller;
+		#interrupt-cells = <2>;
+		interrupt-controller;
+		interrupts-extended = <&tlmm 39 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-0 = <&expander3_int>;
+		pinctrl-names = "default";
 	};
 
 	eeprom@50 {
@@ -920,6 +940,30 @@
 		};
 	};
 
+	expander0_int: expander0-int-state {
+		pins = "gpio138";
+		function = "gpio";
+		bias-pull-up;
+	};
+
+	expander1_int: expander1-int-state {
+		pins = "gpio19";
+		function = "gpio";
+		bias-pull-up;
+	};
+
+	expander2_int: expander2-int-state {
+		pins = "gpio139";
+		function = "gpio";
+		bias-pull-up;
+	};
+
+	expander3_int: expander3-int-state {
+		pins = "gpio39";
+		function = "gpio";
+		bias-pull-up;
+	};
+
 	pcie0_default_state: pcie0-default-state {
 		clkreq-pins {
 			pins = "gpio1";