Change in coreboot[master]: Coral: Add Synaptics touchpad support

[Peggy Chuang (Code Review)]

Peggy Chuang has uploaded this change for review. ( https://review.coreboot.org/21696

Change subject: Coral: Add Synaptics touchpad support
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Coral: Add Synaptics touchpad support

We need support two touchpad for Robo project,
so adding Synaptices touchpad to coral.

BUG=b:63134907
TEST=Compiled, verified by ODM

Change-Id: If5a650338d5a7e6f01e9525d28588b871d390e50
Signed-off-by: Peggy Chuang 
---
M src/mainboard/google/reef/variants/coral/devicetree.cb
1 file changed, 9 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/96/21696/1

diff --git a/src/mainboard/google/reef/variants/coral/devicetree.cb b/src/mainboard/google/reef/variants/coral/devicetree.cb
index 4f889d8..8208b10 100644
--- a/src/mainboard/google/reef/variants/coral/devicetree.cb
+++ b/src/mainboard/google/reef/variants/coral/devicetree.cb
@@ -205,6 +205,15 @@
    			register "probed" = "1"
    			device i2c 15 on end
    		end
+			chip drivers/i2c/hid
+				register "generic.hid" = ""PNP0C50""
+				register "generic.desc" = ""Synaptics Touchpad""
+				register "generic.irq" = "ACPI_IRQ_EDGE_LOW(GPIO_18_IRQ)"
+				register "generic.wake" = "GPE0_DW1_15"
+				register "generic.probed" = "1"
+				register "hid_dsc_reg_offset" = "0x20"
+				device i2c 0x2c on end
+			end
    	end # - I2C 4
    	device pci 17.1 on
    		chip drivers/i2c/hid