linux-kernel - [PATCH 2/3] ARM: dts: samsung: exynos4210-i9100: Add node for touch keys

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Message-ID: <20231206221556.15348-3-paul@crapouillou.net>
Date:   Wed,  6 Dec 2023 23:15:55 +0100
From:   Paul Cercueil <paul@...pouillou.net>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Alim Akhtar <alim.akhtar@...sung.com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 2/3] ARM: dts: samsung: exynos4210-i9100: Add node for touch keys

Add a Device Tree node to support the LED-backed "menu" and "back" keys.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 .../arm/boot/dts/samsung/exynos4210-i9100.dts | 23 ++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/samsung/exynos4210-i9100.dts b/arch/arm/boot/dts/samsung/exynos4210-i9100.dts
index a076a1dfe41f..f03b03dbe9f2 100644
--- a/arch/arm/boot/dts/samsung/exynos4210-i9100.dts
+++ b/arch/arm/boot/dts/samsung/exynos4210-i9100.dts
@@ -184,6 +184,28 @@ s5k5bafx_ep: endpoint {
 		};
 	};
 
+	i2c-gpio-2 {
+		compatible = "i2c-gpio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		sda-gpios = <&gpk1 2 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+		scl-gpios = <&gpk1 0 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+		i2c-gpio,delay-us = <2>;
+
+		touchscreen@20 {
+			compatible = "cypress,aries-touchkey";
+			reg = <0x20>;
+
+			interrupt-parent = <&gpl0>;
+			interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
+
+			vdd-supply = <&vtouchled_reg>;
+			vcc-supply = <&vtouch_reg>;
+			linux,keycodes = <KEY_MENU>, <KEY_BACK>;
+		};
+	};
+
 	spi-3 {
 		compatible = "spi-gpio";
 		#address-cells = <1>;
@@ -513,7 +535,6 @@ vtouch_reg: LDO11 {
 				regulator-name = "TOUCH_2.8V";
 				regulator-min-microvolt = <2800000>;
 				regulator-max-microvolt = <2800000>;
-				regulator-always-on;
 			};
 
 			vpll_reg: LDO10 {
-- 
2.42.0