From:   Alistair Francis <alistair@alistair23.me>
To:     devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     dmitry.torokhov@gmail.com, alistair23@gmail.com,
        robh+dt@kernel.org, linus.walleij@linaro.org, rydberg@bitmath.org,
        andreas@kemnade.info, Alistair Francis <alistair@alistair23.me>
Subject: [PATCH v4 4/4] ARM: dts: imx7d-remarkable2: Enable the cyttsp5
Date:   Wed, 22 Dec 2021 22:46:03 +1000
Message-Id: <20211222124603.326920-5-alistair@alistair23.me>
In-Reply-To: <20211222124603.326920-1-alistair@alistair23.me>
References: <20211222124603.326920-1-alistair@alistair23.me>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

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 | 89 +++++++++++++++++++++++++
 1 file changed, 89 insertions(+)

diff --git a/arch/arm/boot/dts/imx7d-remarkable2.dts b/arch/arm/boot/dts/imx7d-remarkable2.dts
index 89cbf13097a4..f12d6805b214 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";
@@ -34,6 +35,18 @@ reg_brcm: regulator-brcm {
 		startup-delay-us = <150>;
 	};
 
+	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";
@@ -51,6 +64,59 @@ &clks {
 	assigned-clock-rates = <0>, <32768>;
 };
 
+&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 {
+			linux,code = <KEY_HOMEPAGE>;
+		};
+
+		button-1 {
+			linux,code = <KEY_MENU>;
+		};
+
+		button-2 {
+			linux,code = <KEY_BACK>;
+		};
+
+		button-3 {
+			linux,code = <KEY_SEARCH>;
+		};
+
+		button-4 {
+			linux,code = <KEY_VOLUMEDOWN>;
+		};
+
+		button-5 {
+			linux,code = <KEY_VOLUMEUP>;
+		};
+
+		button-6 {
+			linux,code = <KEY_CAMERA>;
+		};
+
+		button-7 {
+			linux,code = <KEY_POWER>;
+		};
+	};
+};
+
 &snvs_pwrkey {
 	status = "okay";
 };
@@ -125,6 +191,29 @@ 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_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
-- 
2.31.1