[Linux-stm32] [PATCH 1/4] ARM: dts: stm32: Add GPIO keys for STM32MP1 DHCOM PDK2

[Marek Vasut]

Add bindings for the four GPIO keys on DH PDK2 board. Note that TA1
key is polled because it's IRQ line conflicts with ethernet IRQ, the
rest of the GPIO keys, TA2, TA3, TA4, are interrupt-driven and wake
up sources.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Alexandre Torgue <alexandre.torgue at st.com>
Cc: Maxime Coquelin <mcoquelin.stm32 at gmail.com>
Cc: Patrice Chotard <patrice.chotard at st.com>
Cc: Patrick Delaunay <patrick.delaunay at st.com>
Cc: linux-stm32 at st-md-mailman.stormreply.com
To: linux-arm-kernel at lists.infradead.org
---
 arch/arm/boot/dts/stm32mp157c-dhcom-pdk2.dts | 43 ++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/arch/arm/boot/dts/stm32mp157c-dhcom-pdk2.dts b/arch/arm/boot/dts/stm32mp157c-dhcom-pdk2.dts
index 13b1586d4a8f..e5036c9b9e92 100644
--- a/arch/arm/boot/dts/stm32mp157c-dhcom-pdk2.dts
+++ b/arch/arm/boot/dts/stm32mp157c-dhcom-pdk2.dts
@@ -4,6 +4,7 @@
  */
 
 #include "stm32mp157c-dhcom-som.dtsi"
+#include <dt-bindings/input/input.h>
 #include <dt-bindings/pwm/pwm.h>
 
 / {
@@ -46,6 +47,48 @@ ethernet_vio: vioregulator {
 		regulator-boot-on;
 	};
 
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		#size-cells = <0>;
+		poll-interval = <20>;
+
+		/*
+		 * The EXTi IRQ line 3 is shared with touchscreen and ethernet,
+		 * so mark this as polled GPIO key.
+		 */
+		button-0 {
+			label = "TA1-GPIO-A";
+			linux,code = <KEY_A>;
+			gpios = <&gpiof 3 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+		#size-cells = <0>;
+
+		button-1 {
+			label = "TA2-GPIO-B";
+			linux,code = <KEY_B>;
+			gpios = <&gpiod 6 GPIO_ACTIVE_LOW>;
+			wakeup-source;
+		};
+
+		button-2 {
+			label = "TA3-GPIO-C";
+			linux,code = <KEY_C>;
+			gpios = <&gpioi 11 GPIO_ACTIVE_LOW>;
+			wakeup-source;
+		};
+
+		button-3 {
+			label = "TA4-GPIO-D";
+			linux,code = <KEY_D>;
+			gpios = <&gpiod 12 GPIO_ACTIVE_LOW>;
+			wakeup-source;
+		};
+	};
+
 	panel {
 		compatible = "edt,etm0700g0edh6";
 		backlight = <&display_bl>;
-- 
2.25.1