linux-kernel - [PATCH 3/3] arm64: dts: rockchip: make Haikou buttons compatible with "gpio-keys"

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Date:   Thu, 14 Dec 2023 13:28:01 +0100
From:   Vahe Grigoryan <vahe.grigoryan@...obroma-systems.com>
To:     quentin.schulz@...obroma-systems.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        heiko@...ech.de
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Vahe Grigoryan <vahe.grigoryan@...obroma-systems.com>
Subject: [PATCH 3/3] arm64: dts: rockchip: make Haikou buttons compatible with "gpio-keys"

Haikou is an evaluation and development platform for System on
Modules (SOMs).

Haikou devkit exposes multiple buttons so let's register them as
such so that the input subsystem can generate events when pressed or
switched.

Signed-off-by: Vahe Grigoryan <vahe.grigoryan@...obroma-systems.com>
---
 .../boot/dts/rockchip/rk3399-puma-haikou.dts  | 40 ++++++++++++++++---
 1 file changed, 35 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts b/arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts
index 4f2d4bb12032..18a98c4648ea 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts
@@ -5,6 +5,7 @@
 
 /dts-v1/;
 #include "rk3399-puma.dtsi"
+#include <dt-bindings/input/input.h>
 
 / {
 	model = "Theobroma Systems RK3399-Q7 SoM";
@@ -18,6 +19,38 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
+	gpio-keys {
+		compatible = "gpio-keys";
+		pinctrl-0 = <&haikou_keys_pin>;
+		pinctrl-names = "default";
+
+		button-batlow-n {
+			gpios = <&gpio0 RK_PB2 GPIO_ACTIVE_LOW>;
+			label = "BATLOW#";
+			linux,code = <KEY_BATTERY>;
+		};
+
+		button-slp-btn-n {
+			gpios = <&gpio0 RK_PB3 GPIO_ACTIVE_LOW>;
+			label = "SLP_BTN#";
+			linux,code = <KEY_SLEEP>;
+		};
+
+		button-wake-n {
+			gpios = <&gpio0 RK_PB1 GPIO_ACTIVE_LOW>;
+			label = "WAKE#";
+			linux,code = <KEY_WAKEUP>;
+			wakeup-source;
+		};
+
+		switch-lid-btn-n {
+			gpios = <&gpio0 RK_PA4 GPIO_ACTIVE_LOW>;
+			label = "LID_BTN#";
+			linux,code = <SW_LID>;
+			linux,input-type = <EV_SW>;
+		};
+	};
+
 	leds {
 		pinctrl-0 = <&module_led_pin>, <&sd_card_led_pin>;
 
@@ -165,11 +198,8 @@ &pcie0 {
 };
 
 &pinctrl {
-	pinctrl-names = "default";
-	pinctrl-0 = <&haikou_pin_hog>;
-
-	hog {
-		haikou_pin_hog: haikou-pin-hog {
+	buttons {
+		haikou_keys_pin: haikou-keys-pin {
 			rockchip,pins =
 			  /* LID_BTN */
 			  <0 RK_PA4 RK_FUNC_GPIO &pcfg_pull_up>,
-- 
2.34.1