From 87cabf9405cbfba439d59fa5d956e4c5e76a061c Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Wed, 13 May 2020 20:10:17 +0200
Subject: [PATCH] ARM: dts: stm32: Add GPIO keys for STM32MP1 DHCOM PDK2

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@denx.de>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: linux-stm32@st-md-mailman.stormreply.com
To: linux-arm-kernel@lists.infradead.org
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
---
 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>;