Add support for the Cypress cyttsp5

index dc90a3ea51ee..f332afcb2541 100644
@@ -284,6 +284,22 @@ config TOUCHSCREEN_CYTTSP4_SPI
 	  To compile this driver as a module, choose M here: the
 	  module will be called cyttsp4_spi.
 
+config TOUCHSCREEN_CYTTSP5
+	tristate "Cypress TrueTouch Gen5 Touchscreen Driver"
+	depends on I2C
+	select REGMAP_I2C
+	select CRC_ITU_T
+	help
+	  Driver for Parade TrueTouch Standard Product Generation 5
+	  touchscreen controllers. I2C bus interface support only.
+
+	  Say Y here if you have a Cypress Gen5 touchscreen.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called cyttsp5.
+
 config TOUCHSCREEN_DA9034
 	tristate "Touchscreen support for Dialog Semiconductor DA9034"
 	depends on PMIC_DA903X

index 557f84fd2075..044324c9dd13 100644
@@ -30,6 +30,7 @@ obj-$(CONFIG_TOUCHSCREEN_CYTTSP_SPI)	+= cyttsp_spi.o
 obj-$(CONFIG_TOUCHSCREEN_CYTTSP4_CORE)	+= cyttsp4_core.o
 obj-$(CONFIG_TOUCHSCREEN_CYTTSP4_I2C)	+= cyttsp4_i2c.o cyttsp_i2c_common.o
 obj-$(CONFIG_TOUCHSCREEN_CYTTSP4_SPI)	+= cyttsp4_spi.o
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP5)	+= cyttsp5.o
 obj-$(CONFIG_TOUCHSCREEN_DA9034)	+= da9034-ts.o
 obj-$(CONFIG_TOUCHSCREEN_DA9052)	+= da9052_tsi.o
 obj-$(CONFIG_TOUCHSCREEN_DYNAPRO)	+= dynapro.o

new file mode 100644
index 000000000000..1959ec394768
@@ -0,0 +1,106 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/touchscreen/cypress,tt21000.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cypress TT21000 touchscreen controller
+
+description: The Cypress TT21000 series (also known as "CYTTSP5" after
+  the marketing name Cypress TrueTouch Standard Product series 5).
+
+maintainers:
+  - Alistair Francis <[email protected]>
+
+allOf:
+  - $ref: touchscreen.yaml#
+
+properties:
+  compatible:
+    const: cypress,tt21000
+
+  reg:
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+  interrupts:
+    maxItems: 1
+
+  vdd-supply:
+    description: Regulator for voltage.
+
+  reset-gpios:
+    maxItems: 1
+
+  linux,keycodes:
+    description: EV_ABS specific event code generated by the axis.
+
+patternProperties:
+  "^button@[0-9]+$":
+    type: object
+    $ref: ../input.yaml#
+    properties:
+      reg:
+        maxItems: 1
+      linux,keycodes:
+        description: Keycode to emit
+
+    required:
+      - reg
+      - linux,keycodes
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - vdd-supply
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/input/linux-event-codes.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        touchscreen@24 {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            compatible = "cypress,tt21000";
+            reg = <0x24>;
+            pinctrl-names = "default";
+            pinctrl-0 = <&tp_reset_ds203>;
+            interrupt-parent = <&pio>;
+            interrupts = <1 5 IRQ_TYPE_LEVEL_LOW>;
+            reset-gpios = <&pio 7 1 GPIO_ACTIVE_LOW>;
+            vdd-supply = <&reg_touch>;
+
+            button@0 {
+                reg = <0>;
+                linux,keycodes = <KEY_HOMEPAGE>;
+            };
+
+            button@1 {
+                reg = <1>;
+                linux,keycodes = <KEY_MENU>;
+            };
+
+            button@2 {
+                reg = <2>;
+                linux,keycodes = <KEY_BACK>;
+            };
+        };
+    };
+...

index 078d61b758a9..8665b192d83c 100644
@@ -166,6 +166,7 @@ CONFIG_TOUCHSCREEN_ADS7846=y
 CONFIG_TOUCHSCREEN_AD7879=y
 CONFIG_TOUCHSCREEN_AD7879_I2C=y
 CONFIG_TOUCHSCREEN_ATMEL_MXT=y
+CONFIG_TOUCHSCREEN_CYTTSP5=y
 CONFIG_TOUCHSCREEN_DA9052=y
 CONFIG_TOUCHSCREEN_EGALAX=y
 CONFIG_TOUCHSCREEN_GOODIX=y

index a2a91bfdd98e..fea480af8e48 100644
@@ -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 +97,70 @@ wacom_digitizer: digitizer@9 {
 	};
 };
 
+&i2c3 {
+	clock-frequency = <100000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c3>;
+	status = "okay";
+
+	tsc@24 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		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 +254,15 @@ 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 +270,20 @@ 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