[PATCH v2] arm64: dts: ti: k3-am64: Enable IO expander interrupt

[PATCH v2] arm64: dts: ti: k3-am64: Enable IO expander interrupt

[Judith Mendez]

On AM64 EVM and SK boards, MMC1_SDWP is used for IO expander interrupt,
remove from MMC1 pinmux node and setup as exp1 IO expander interrupt.

Signed-off-by: Judith Mendez <jm@ti.com>
---
Change from v1:
- Add header files
- Change IRQ_TYPE_LEVEL_HIGH to IRQ_TYPE_EDGE_FALLING

V1 is from the original patch series here:
Link: https://lore.kernel.org/linux-devicetree/20260729195958.671147-1-jm@ti.com/
---
 arch/arm64/boot/dts/ti/k3-am642-evm.dts | 15 ++++++++++++++-
 arch/arm64/boot/dts/ti/k3-am642-sk.dts  | 15 ++++++++++++++-
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
index bc4347cf71140..28fbaf134af4f 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
@@ -8,6 +8,7 @@
 #include <dt-bindings/phy/phy.h>
 #include <dt-bindings/leds/common.h>
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/net/ti-dp83867.h>
 #include "k3-am642.dtsi"
 
@@ -259,11 +260,17 @@ AM64X_IOPAD(0x0284, PIN_INPUT_PULLUP, 0) /* (L21) MMC1_DAT1 */
 			AM64X_IOPAD(0x0280, PIN_INPUT_PULLUP, 0) /* (K19) MMC1_DAT2 */
 			AM64X_IOPAD(0x027c, PIN_INPUT_PULLUP, 0) /* (K18) MMC1_DAT3 */
 			AM64X_IOPAD(0x0298, PIN_INPUT_PULLUP, 0) /* (D19) MMC1_SDCD */
-			AM64X_IOPAD(0x029c, PIN_INPUT, 0) /* (C20) MMC1_SDWP */
 			AM64X_IOPAD(0x0290, PIN_INPUT, 0) /* MMC1_CLKLB */
 		>;
 	};
 
+	main_gpio1_ioexp_intr_pins_default: main-gpio1-ioexp-intr-default-pins {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x029c, PIN_INPUT, 7) /* (C20) MMC1_SDWP.GPIO1_78 */
+		>;
+		bootph-all;
+	};
+
 	main_uart1_pins_default: main-uart1-default-pins {
 		pinctrl-single,pins = <
 			AM64X_IOPAD(0x0248, PIN_INPUT, 0)		/* (D16) UART1_CTSn */
@@ -481,6 +488,12 @@ exp1: gpio@22 {
 		bootph-all;
 		compatible = "ti,tca6424";
 		reg = <0x22>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&main_gpio1_ioexp_intr_pins_default>;
+		interrupt-parent = <&main_gpio1>;
+		interrupts = <78 IRQ_TYPE_EDGE_FALLING>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
 		gpio-controller;
 		#gpio-cells = <2>;
 		gpio-line-names = "GPIO_eMMC_RSTn", "CAN_MUX_SEL",
diff --git a/arch/arm64/boot/dts/ti/k3-am642-sk.dts b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
index d28a38c87f32a..aa87845d77598 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
@@ -7,6 +7,7 @@
 
 #include <dt-bindings/phy/phy.h>
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/net/ti-dp83867.h>
 #include <dt-bindings/leds/common.h>
 #include "k3-am642.dtsi"
@@ -198,7 +199,6 @@ &main_pmx0 {
 	main_mmc1_pins_default: main-mmc1-default-pins {
 		bootph-all;
 		pinctrl-single,pins = <
-			AM64X_IOPAD(0x029c, PIN_INPUT_PULLUP, 0) /* (C20) MMC1_SDWP */
 			AM64X_IOPAD(0x0298, PIN_INPUT_PULLUP, 0) /* (D19) MMC1_SDCD */
 			AM64X_IOPAD(0x0294, PIN_INPUT_PULLUP, 0) /* (J19) MMC1_CMD */
 			AM64X_IOPAD(0x0290, PIN_INPUT, 0) /* (#N/A) MMC1_CLKLB */
@@ -210,6 +210,13 @@ AM64X_IOPAD(0x027c, PIN_INPUT_PULLUP, 0) /* (K18) MMC1_DAT3 */
 		>;
 	};
 
+	main_gpio1_ioexp_intr_pins_default: main-gpio1-ioexp-intr-default-pins {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x029c, PIN_INPUT, 7) /* (C20) MMC1_SDWP.GPIO1_78 */
+		>;
+		bootph-all;
+	};
+
 	main_uart0_pins_default: main-uart0-default-pins {
 		bootph-all;
 		pinctrl-single,pins = <
@@ -383,6 +390,12 @@ exp1: gpio@70 {
 		bootph-all;
 		compatible = "nxp,pca9538";
 		reg = <0x70>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&main_gpio1_ioexp_intr_pins_default>;
+		interrupt-parent = <&main_gpio1>;
+		interrupts = <78 IRQ_TYPE_EDGE_FALLING>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
 		gpio-controller;
 		#gpio-cells = <2>;
 		gpio-line-names = "GPIO_CPSW2_RST", "GPIO_CPSW1_RST",
-- 
2.54.0