mb/cannonlake_rvp: Enable Touchpad

This patch enables the APLS touchpad in cnl-y platform.

TEST= Boot and test touchpad works.

Change-Id: I461b9d119b1cac6c8c6cb9b096697f58e00d80ad
Signed-off-by: Shaunak Saha <shaunak.saha@intel.com>
Reviewed-on: https://review.coreboot.org/22369
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/intel/cannonlake_rvp/Kconfig b/src/mainboard/intel/cannonlake_rvp/Kconfig
index 1858258..b69a5e9 100644
--- a/src/mainboard/intel/cannonlake_rvp/Kconfig
+++ b/src/mainboard/intel/cannonlake_rvp/Kconfig
@@ -8,6 +8,8 @@
 	select HAVE_ACPI_TABLES
 	select MAINBOARD_HAS_CHROMEOS
 	select GENERIC_SPD_BIN
+	select DRIVERS_I2C_HID
+	select DRIVERS_I2C_GENERIC
 
 config MAINBOARD_DIR
 	string
diff --git a/src/mainboard/intel/cannonlake_rvp/variants/cnl_y/devicetree.cb b/src/mainboard/intel/cannonlake_rvp/variants/cnl_y/devicetree.cb
index ca46d36..d55259d 100644
--- a/src/mainboard/intel/cannonlake_rvp/variants/cnl_y/devicetree.cb
+++ b/src/mainboard/intel/cannonlake_rvp/variants/cnl_y/devicetree.cb
@@ -83,7 +83,15 @@
 		device pci 14.1 off end # USB xDCI (OTG)
 		device pci 14.3 on  end # CNVi wifi
 		device pci 14.5 on  end # SDCard
-		device pci 15.0 on  end # I2C #0
+		device pci 15.0 on
+			chip drivers/i2c/hid
+				register "generic.hid" = ""ALPS0001""
+				register "generic.desc" = ""Touchpad""
+				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPP_B3_IRQ)"
+				register "hid_desc_reg_offset" = "0x1"
+				device i2c 2C on end
+			end
+		end # I2C 0
 		device pci 15.1 on  end # I2C #1
 		device pci 15.2 off end # I2C #2
 		device pci 15.3 off end # I2C #3