This platform carries a HID compatible I2C touchscreen on the i2c4 bus,
but it may be at a different address, depending on the board model.
Add the node for a touchscreen at 0x10, but enable it only in the
final board dts.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 .../dts/mediatek/mt8195-cherry-tomato-r1.dts  |  4 +++
 .../dts/mediatek/mt8195-cherry-tomato-r2.dts  |  4 +++
 .../dts/mediatek/mt8195-cherry-tomato-r3.dts  |  4 +++
 .../boot/dts/mediatek/mt8195-cherry.dtsi      | 28 +++++++++++++++++++
 4 files changed, 40 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts
index 7ca344ccc225..3348ba69ff6c 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts
@@ -9,3 +9,7 @@ / {
 	model = "Acer Tomato (rev1) board";
 	compatible = "google,tomato-rev1", "google,tomato", "mediatek,mt8195";
 };
+
+&ts_10 {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r2.dts b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r2.dts
index eb80f23273aa..4669e9d917f8 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r2.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r2.dts
@@ -29,3 +29,7 @@ pins-low-power-pcie0-disable {
 		bias-pull-down;
 	};
 };
+
+&ts_10 {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r3.dts b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r3.dts
index f9cdda07da88..5021edd02f7c 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r3.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r3.dts
@@ -30,3 +30,7 @@ pins-low-power-pcie0-disable {
 		bias-pull-down;
 	};
 };
+
+&ts_10 {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index 2c8b760d0da1..fcc600674339 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -145,6 +145,18 @@ &i2c4 {
 	clock-frequency = <400000>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&i2c4_pins>;
+
+	ts_10: touchscreen@10 {
+		compatible = "hid-over-i2c";
+		reg = <0x10>;
+		hid-descr-addr = <0x0001>;
+		interrupts-extended = <&pio 92 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&touchscreen_pins>;
+		post-power-on-delay-ms = <10>;
+		vdd-supply = <&pp3300_s3>;
+		status = "disabled";
+	};
 };
 
 &i2c5 {
@@ -609,6 +621,22 @@ subpmic_pin_irq: pins-subpmic-int-n {
 			bias-pull-up;
 		};
 	};
+
+	touchscreen_pins: touchscreen-default-pins {
+		pins-int-n {
+			pinmux = <PINMUX_GPIO92__FUNC_GPIO92>;
+			input-enable;
+			bias-pull-up = <MTK_PUPD_SET_R1R0_01>;
+		};
+		pins-rst {
+			pinmux = <PINMUX_GPIO56__FUNC_GPIO56>;
+			output-high;
+		};
+		pins-report-sw {
+			pinmux = <PINMUX_GPIO57__FUNC_GPIO57>;
+			output-low;
+		};
+	};
 };
 
 &pmic {
-- 
2.35.1