arm64: dts: nvidia: tegra210-smaug: Add touchscreen node

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>
Tested-by: Diogo Ivo <diogo.ivo@tecnico.ulisboa.pt>
Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts b/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
index 2e5b6b2..6f77540 100644 (file)
--- a/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
@@ -1362,6 +1362,19 @@
                };
        };
 
+       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>;