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From:   Alistair Francis <alistair@alistair23.me>
To:     linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org, linux-input@vger.kernel.org
Cc:     robh+dt@kernel.org, linus.walleij@linaro.org, rydberg@bitmath.org,
        dmitry.torokhov@gmail.com, andreas@kemnade.info,
        alistair23@gmail.com, Alistair Francis <alistair@alistair23.me>
Subject: [PATCH v6 4/4] ARM: dts: imx7d-remarkable2: Enable the cyttsp5
Date:   Sun, 27 Feb 2022 22:33:18 +1000
Message-Id: <20220227123318.313009-5-alistair@alistair23.me>
In-Reply-To: <20220227123318.313009-1-alistair@alistair23.me>
References: <20220227123318.313009-1-alistair@alistair23.me>
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Add support for the cyttsp5 touchscreen controller for the reMarkable 2.

Signed-off-by: Alistair Francis <alistair@alistair23.me>
---
 arch/arm/boot/dts/imx7d-remarkable2.dts | 97 +++++++++++++++++++++++++
 1 file changed, 97 insertions(+)

diff --git a/arch/arm/boot/dts/imx7d-remarkable2.dts b/arch/arm/boot/dts/imx7d-remarkable2.dts
index a2a91bfdd98e..ca18ccc03197 100644
--- a/arch/arm/boot/dts/imx7d-remarkable2.dts
+++ b/arch/arm/boot/dts/imx7d-remarkable2.dts
@@ -8,6 +8,7 @@
 /dts-v1/;
 
 #include "imx7d.dtsi"
+#include <dt-bindings/input/linux-event-codes.h>
 
 / {
 	model = "reMarkable 2.0";
@@ -47,6 +48,18 @@ reg_digitizer: regulator-digitizer {
 		startup-delay-us = <100000>; /* 100 ms */
 	};
 
+	reg_touch: regulator-touch {
+		compatible = "regulator-fixed";
+		regulator-name = "VDD_3V3_TOUCH";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		pinctrl-names = "default", "sleep";
+		pinctrl-0 = <&pinctrl_touch_reg>;
+		pinctrl-1 = <&pinctrl_touch_reg>;
+		gpio = <&gpio1 11 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
 	wifi_pwrseq: wifi_pwrseq {
 		compatible = "mmc-pwrseq-simple";
 		pinctrl-names = "default";
@@ -84,6 +97,67 @@ wacom_digitizer: digitizer@9 {
 	};
 };
 
+&i2c3 {
+	clock-frequency = <100000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c3>;
+	status = "okay";
+
+	tsc@24 {
+		compatible = "cypress,tt21000";
+		reg = <0x24>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_touch>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <14 IRQ_TYPE_EDGE_FALLING>;
+		reset-gpios = <&gpio1 13 GPIO_ACTIVE_LOW>;
+		vdd-supply = <&reg_touch>;
+		touchscreen-size-x = <880>;
+		touchscreen-size-y = <1280>;
+
+		button@0 {
+			reg = <0>;
+			linux,keycodes = <KEY_HOMEPAGE>;
+		};
+
+		button@1 {
+			reg = <1>;
+			linux,keycodes = <KEY_MENU>;
+		};
+
+		button@2 {
+			reg = <2>;
+			linux,keycodes = <KEY_BACK>;
+		};
+
+		button@3 {
+			reg = <3>;
+			linux,keycodes = <KEY_SEARCH>;
+		};
+
+		button@4 {
+			reg = <4>;
+			linux,keycodes = <KEY_VOLUMEDOWN>;
+		};
+
+		button@5 {
+			reg = <5>;
+			linux,keycodes = <KEY_VOLUMEUP>;
+		};
+
+		button@6 {
+			reg = <6>;
+			linux,keycodes = <KEY_CAMERA>;
+		};
+
+		button@7 {
+			reg = <7>;
+			linux,keycodes = <KEY_POWER>;
+		};
+	};
+};
+
 &snvs_pwrkey {
 	status = "okay";
 };
@@ -177,6 +251,15 @@ MX7D_PAD_SAI1_TX_BCLK__GPIO6_IO13	0x14
 		>;
 	};
 
+	pinctrl_touch: touchgrp {
+		fsl,pins = <
+			/* CYTTSP interrupt */
+			MX7D_PAD_GPIO1_IO14__GPIO1_IO14		0x54
+			/* CYTTSP reset */
+			MX7D_PAD_GPIO1_IO13__GPIO1_IO13		0x04
+		>;
+	};
+
 	pinctrl_i2c1: i2c1grp {
 		fsl,pins = <
 			MX7D_PAD_I2C1_SDA__I2C1_SDA		0x4000007f
@@ -184,6 +267,20 @@ MX7D_PAD_I2C1_SCL__I2C1_SCL		0x4000007f
 		>;
 	};
 
+	pinctrl_i2c3: i2c3grp {
+		fsl,pins = <
+			MX7D_PAD_I2C3_SDA__I2C3_SDA		0x4000007f
+			MX7D_PAD_I2C3_SCL__I2C3_SCL		0x4000007f
+		>;
+	};
+
+	pinctrl_touch_reg: touchreggrp {
+		fsl,pins = <
+			/* TOUCH_PWR_EN */
+			MX7D_PAD_GPIO1_IO11__GPIO1_IO11		0x14
+		>;
+	};
+
 	pinctrl_uart1: uart1grp {
 		fsl,pins = <
 			MX7D_PAD_UART1_TX_DATA__UART1_DCE_TX	0x79
-- 
2.34.1