From: Jasper Korten <jja2000@gmail.com>

The Google Pixel C contains a RMI4 HID over I2C touchscreen.
Add a DT node for the touchscreen.

Information gathered from downstream tree.
Link: https://android.googlesource.com/kernel/tegra/+/refs/heads/android-tegra-dragon-3.18-oreo-m8/arch/arm64/boot/dts/tegra/tegra210-smaug.dtsi#542

Signed-off-by: Jasper Korten <jja2000@gmail.com>
---
 arch/arm64/boot/dts/nvidia/tegra210-smaug.dts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts b/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
index 2e5b6b2c1f56..6f77540fd397 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
@@ -1362,6 +1362,19 @@ bluetooth {
 		};
 	};
 
+	i2c@7000c000 {
+		status = "okay";
+		clock-frequency = <1000000>;
+
+		touchscreen: i2c-hid-dev@20 {
+				compatible = "hid-over-i2c";
+				reg = <0x20>;
+				hid-descr-addr = <0x0020>;
+				interrupt-parent = <&gpio>;
+				interrupts = <TEGRA_GPIO(X, 1) IRQ_TYPE_EDGE_FALLING>;
+		};
+	};
+
 	i2c@7000c400 {
 		status = "okay";
 		clock-frequency = <1000000>;

-- 
2.46.0