Change in coreboot[master]: mb/google/guybrush/var/dewatt: Add Elan touchscreen

[Kenneth Chan (Code Review)]

Kenneth Chan has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/59975 )

Change subject: mb/google/guybrush/var/dewatt: Add Elan touchscreen
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mb/google/guybrush/var/dewatt: Add Elan touchscreen

Add Elan 6918 touchscreen for dewatt.

BUG=b:208373433
TEST=emerge-guybrush coreboot chromeos-bootimage

Signed-off-by: Kenneth Chan 
Change-Id: I28a7f5891e09ffa393c93881be68641d955efdf8
---
M src/mainboard/google/guybrush/variants/dewatt/overridetree.cb
1 file changed, 20 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/75/59975/1

diff --git a/src/mainboard/google/guybrush/variants/dewatt/overridetree.cb b/src/mainboard/google/guybrush/variants/dewatt/overridetree.cb
index 5a0ad98..56e9542 100644
--- a/src/mainboard/google/guybrush/variants/dewatt/overridetree.cb
+++ b/src/mainboard/google/guybrush/variants/dewatt/overridetree.cb
@@ -54,4 +54,24 @@
    		device i2c 15 on end
    	end
    end # I2C0
+        device ref i2c_1 on
+		chip drivers/i2c/hid
+			register "generic.hid" = ""ELAN6918""
+			register "generic.desc" = ""ELAN Touchscreen""
+			register "generic.irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_89)"
+                        register "generic.probed" = "1"
+			register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPIO_121)"
+			register "generic.reset_delay_ms" = "20"
+			register "generic.reset_off_delay_ms" = "2"
+			register "generic.stop_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPIO_120)"
+			register "generic.stop_delay_ms" = "280"
+			register "generic.stop_off_delay_ms" = "2"
+			register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_68)"
+			register "generic.enable_delay_ms" = "1"
+			register "generic.has_power_resource" = "1"
+			register "generic.disable_gpio_export_in_crs" = "1"
+			register "hid_desc_reg_offset" = "0x01"
+			device i2c 10 on end
+		end
+        end # I2C1	
 end	# chip soc/amd/cezanne