[PATCH] arm64: dts: renesas: r9a09g047e57-smarc: Add gpio keys

[Biju Das <biju.das.jz@xxxxxxxxxxxxxx>]

RZ/G3E SMARC EVK  has 3 user buttons called USER_SW1, USER_SW2 and
USER_SW3. Add a DT node in device tree to instantiate the gpio-keys driver
for these buttons.

Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
 .../boot/dts/renesas/r9a09g047e57-smarc.dts   | 27 +++++++++++++++++
 .../boot/dts/renesas/renesas-smarc2.dtsi      | 30 +++++++++++++++++++
 2 files changed, 57 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts b/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
index 5d7983812c70..246327a19527 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
@@ -8,9 +8,18 @@
 /dts-v1/;
 
 /* Switch selection settings */
+#define SW_LCD_EN		0
 #define SW_SD0_DEV_SEL		0
 #define SW_SDIO_M2E		0
 
+#define PMOD_GPIO4		0
+#define PMOD_GPIO6		0
+#define PMOD_GPIO7		0
+
+#define  KEY_1_GPIO		RZG3E_GPIO(3, 1)
+#define  KEY_2_GPIO		RZG3E_GPIO(8, 4)
+#define  KEY_3_GPIO		RZG3E_GPIO(8, 5)
+
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/pinctrl/renesas,r9a09g047-pinctrl.h>
 #include "r9a09g047e57.dtsi"
@@ -33,6 +42,24 @@ vqmmc_sd1_pvdd: regulator-vqmmc-sd1-pvdd {
 	};
 };
 
+&keys{
+#if PMOD_GPIO4
+	/delete-node/ key-1;
+#endif
+
+#if SW_LCD_EN || PMOD_GPIO6
+	/delete-node/ key-2;
+#endif
+
+#if SW_LCD_EN || PMOD_GPIO7
+	/delete-node/ key-3;
+#endif
+};
+
+#if SW_LCD_EN && PMOD_GPIO4 && PMOD_GPIO6 && PMOD_GPIO7
+	/delete-node/ keys;
+#endif
+
 &pinctrl {
 	scif_pins: scif {
 		pins = "SCIF_TXD", "SCIF_RXD";
diff --git a/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi b/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
index fd82df8adc1e..84fb955ad77b 100644
--- a/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
+++ b/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
@@ -12,8 +12,13 @@
  * SW_SDIO_M2E:
  *     0 - SMARC SDIO signal is connected to uSD1
  *     1 - SMARC SDIO signal is connected to M.2 Key E connector
+ *
+ * GPIO keys are enabled by default. Use PMOD_GPIO macros to disable them
+ * if needed.
  */
 
+#include <dt-bindings/input/input.h>
+
 / {
 	model = "Renesas RZ SMARC Carrier-II Board";
 	compatible = "renesas,smarc2-evk";
@@ -27,6 +32,31 @@ aliases {
 		serial3 = &scif0;
 		mmc1 = &sdhi1;
 	};
+
+	keys: keys {
+		compatible = "gpio-keys";
+
+		key-1 {
+			interrupts-extended = <&pinctrl KEY_1_GPIO IRQ_TYPE_EDGE_FALLING>;
+			linux,code = <KEY_1>;
+			label = "USER_SW1";
+			debounce-interval = <20>;
+		};
+
+		key-2 {
+			interrupts-extended = <&pinctrl KEY_2_GPIO IRQ_TYPE_EDGE_FALLING>;
+			linux,code = <KEY_2>;
+			label = "USER_SW2";
+			debounce-interval = <20>;
+		};
+
+		key-3 {
+			interrupts-extended = <&pinctrl KEY_3_GPIO IRQ_TYPE_EDGE_FALLING>;
+			linux,code = <KEY_3>;
+			label = "USER_SW3";
+			debounce-interval = <20>;
+		};
+	};
 };
 
 &scif0 {
-- 
2.43.0