v3/ec: add IT68051 I2C address to devicetree

Use the devicetree to specify the I2C addresses for the functions on
the IT68051 chip.

BUG=b:162915510
TEST=N/A

Change-Id: I0a5eb418363769cf95ac2312ecf6c833fbd6a58b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/chameleon/+/2745217
Tested-by: Paul Fagerburg <pfagerburg@chromium.org>
Auto-Submit: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Reviewed-by: Alexandru M Stan <amstan@chromium.org>
Commit-Queue: Paul Fagerburg <pfagerburg@chromium.org>
diff --git a/v3/ec/boards/arm/chameleon/chameleon.dts b/v3/ec/boards/arm/chameleon/chameleon.dts
index a2333da..b79a585 100644
--- a/v3/ec/boards/arm/chameleon/chameleon.dts
+++ b/v3/ec/boards/arm/chameleon/chameleon.dts
@@ -545,6 +545,24 @@
 		#gpio-cells = <2>;
 		gpio-controller;
 	};
+
+	/* I2C address for the IT68051
+	 *
+	 * Note that the IT68051 documentation uses 8-bit addresses
+	 * (ITE docs say that the HDMI block is address 0x90) but all of
+	 * our code uses 7-bit addresses.
+	 */
+	it68051_hdmi: it68051@48 {
+		compatible = "i2c-device";
+		label = "IT68051_HDMI";
+		reg = <0x48>;
+	};
+
+	it68051_edid: it68051@54 {
+		compatible = "i2c-device";
+		label = "IT68051_EDID";
+		reg = <0x54>;
+	};
 };
 
 &adc1 {