Change in coreboot[master]: mb/google/dedede/var/cret: Add new Elan touchscreen

[Werner Zeh (Code Review)]

Werner Zeh has submitted this change. ( https://review.coreboot.org/c/coreboot/+/54868 )

Change subject: mb/google/dedede/var/cret: Add new Elan touchscreen
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mb/google/dedede/var/cret: Add new Elan touchscreen

Add Elan eKTH7D18 touchscreen into devicetree for cret.

BUG=b:180547935, b:187484857
BRANCH=dedede
TEST=Built cret firmware and verified touchscreen function.

Signed-off-by: Dtrain Hsu 
Change-Id: Iab87ddfc7b46420439efa3e7e55c88ad4c27155d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54868
Tested-by: build bot (Jenkins) 
Reviewed-by: Karthik Ramasubramanian 
Reviewed-by: EricR Lai 
---
M src/mainboard/google/dedede/variants/cret/overridetree.cb
1 file changed, 18 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Karthik Ramasubramanian: Looks good to me, approved
  EricR Lai: Looks good to me, approved

diff --git a/src/mainboard/google/dedede/variants/cret/overridetree.cb b/src/mainboard/google/dedede/variants/cret/overridetree.cb
index 2586322..82002e4 100644
--- a/src/mainboard/google/dedede/variants/cret/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/cret/overridetree.cb
@@ -147,6 +147,24 @@
    			register "has_power_resource" = "1"
    			device i2c 10 on end
    		end
+			chip drivers/i2c/hid
+				register "generic.hid" = ""ELAN900C""
+				register "generic.desc" = ""ELAN Touchscreen""
+				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPP_D4_IRQ)"
+				register "generic.probed" = "1"
+				register "generic.reset_gpio" =
+							"ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_D5)"
+				register "generic.reset_delay_ms" = "6"
+				register "generic.stop_gpio" =
+							"ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_A11)"
+				register "generic.stop_delay_ms" = "300"
+				register "generic.enable_gpio" =
+							"ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_D6)"
+				register "generic.enable_delay_ms" = "6"
+				register "generic.has_power_resource" = "1"
+				register "hid_desc_reg_offset" = "0x01"
+				device i2c 16 on end
+			end
    	end # I2C 2
    	device pci 15.3 off  end # I2C 3
    	device pci 1c.7 on end