linux-kernel - [PATCH 4/7] ARM: dts: exynos: k3g: Add touchkeys support

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Message-ID: <20230716220644.22158-6-markuss.broks@gmail.com>
Date:   Mon, 17 Jul 2023 01:05:06 +0300
From:   Markuss Broks <markuss.broks@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Markuss Broks <markuss.broks@...il.com>,
        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>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/7] ARM: dts: exynos: k3g: Add touchkeys support

This device has touch keys that are compatible with those
installed on Samsung TM2 dev board.

Signed-off-by: Markuss Broks <markuss.broks@...il.com>
---
 arch/arm/boot/dts/exynos5422-samsung-k3g.dts | 32 ++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5422-samsung-k3g.dts b/arch/arm/boot/dts/exynos5422-samsung-k3g.dts
index 582faedd6aab..b3576a745054 100644
--- a/arch/arm/boot/dts/exynos5422-samsung-k3g.dts
+++ b/arch/arm/boot/dts/exynos5422-samsung-k3g.dts
@@ -104,6 +104,33 @@ battery@36 {
 		};
 	};
 
+	i2c-touchkey {
+		compatible = "i2c-gpio";
+
+		sda-gpios = <&gpd1 4 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+		scl-gpios = <&gpd1 5 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+		i2c-gpio,delay-us = <2>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		touchkey@20 {
+			compatible = "cypress,tm2-touchkey";
+			reg = <0x20>;
+
+			interrupt-parent = <&gpy7>;
+			interrupts = <1 IRQ_TYPE_EDGE_FALLING>;
+
+			pinctrl-names = "default";
+			pinctrl-0 = <&touchkey_irq>;
+
+			vcc-supply = <&ldo38_reg>;
+			vdd-supply = <&ldo30_reg>;
+
+			linux,keycodes = <KEY_APPSELECT KEY_BACK>;
+		};
+	};
+
 	tsp_vdd: regulator-tsp-vdd-en {
 		compatible = "regulator-fixed";
 		regulator-name = "tsp_vdd_en";
@@ -742,6 +769,11 @@ power_gpio: power-key-pins {
 		samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
 	};
 
+	touchkey_irq: touchkey-irq-pins {
+		samsung,pins = "gpy7-1";
+		samsung,pin-pud = <EXYNOS_PIN_PULL_DOWN>;
+	};
+
 	wlan_reset: wlan-reset {
 		samsung,pins = "gpy7-7";
 		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
-- 
2.41.0