[coreboot-gerrit] [S] Change in coreboot[main]: mb/google/nissa/var/rull: Add ELAN touchscreen to devicetree

[Subrata Banik (Code Review)]

Subrata Banik has submitted this change. ( https://review.coreboot.org/c/coreboot/+/85015?usp=email )

Change subject: mb/google/nissa/var/rull: Add ELAN touchscreen to devicetree
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mb/google/nissa/var/rull: Add ELAN touchscreen to devicetree

Add Elan touchscreen override devicetree for rull based on the latest
schematic NB7559_MB_SCH_V1_2024_1010.pdf.

BUG=b:374629673
BRANCH=None
TEST=1. emerge-nissa coreboot chromeos-bootimage
     2. touchpanel function is normal and 'evtest' command displays the
        touch point

Change-Id: Ie7f6dce0175c2940abfa14c4e407414912063112
Signed-off-by: Rui Zhou 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/85015
Reviewed-by: Paul Menzel 
Tested-by: build bot (Jenkins) 
Reviewed-by: Eric Lai 
Reviewed-by: Subrata Banik 
---
M src/mainboard/google/brya/variants/rull/overridetree.cb
1 file changed, 19 insertions(+), 1 deletion(-)

Approvals:
  Paul Menzel: Looks good to me, but someone else must approve
  Eric Lai: Looks good to me, approved
  build bot (Jenkins): Verified
  Subrata Banik: Looks good to me, approved

diff --git a/src/mainboard/google/brya/variants/rull/overridetree.cb b/src/mainboard/google/brya/variants/rull/overridetree.cb
index b59a0de..d51fe0b 100644
--- a/src/mainboard/google/brya/variants/rull/overridetree.cb
+++ b/src/mainboard/google/brya/variants/rull/overridetree.cb
@@ -219,7 +219,25 @@
    			device generic 0 on end
    		end
    	end
-		device ref i2c1 off end # Touchscreen
+		device ref i2c1 on
+			chip drivers/i2c/hid
+				register "generic.hid" = ""ELAN9004""
+				register "generic.desc" = ""ELAN Touchscreen""
+				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPP_C7_IRQ)"
+				register "generic.detect" = "1"
+				register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C1)"
+				register "generic.reset_delay_ms" = "20"
+				register "generic.reset_off_delay_ms" = "2"
+				register "generic.stop_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C6)"
+				register "generic.stop_delay_ms" = "150"
+				register "generic.stop_off_delay_ms" = "2"
+				register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_C0)"
+				register "generic.enable_delay_ms" = "1"
+				register "generic.has_power_resource" = "1"
+				register "hid_desc_reg_offset" = "0x01"
+				device i2c 10 on end
+			end
+		end
    	device ref i2c3 on
    		chip drivers/i2c/rt5645
    			register "hid" = ""10EC5650""