[S] Change in coreboot[main]: mb/google/nissa/var/riven: Add elan touchscreen support

[David Wu (Code Review)]

David Wu has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/83876?usp=email )

Change subject: mb/google/nissa/var/riven: Add elan touchscreen support
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mb/google/nissa/var/riven: Add elan touchscreen support

This change adds the necessary configuration for the elan touchscreen(ELAN9004) device, connected to I2C bus 16.

It includes settings for:
* HID descriptor
* Device description
* IRQ configuration
* Detection
* Reset, stop and enable GPIOs with their respective delays
* Power resource handling
* HID descriptor register offset

BUG=b:348125053 b:348126380
TEST=emerge-nissa coreboot
     boot with elan TS, make sure elan TS is functional.

Change-Id: I64c5a11dfaacfcca34240375d4dca5c76a60f62e
Signed-off-by: David Wu 
---
M src/mainboard/google/brya/variants/riven/overridetree.cb
1 file changed, 17 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/76/83876/1

diff --git a/src/mainboard/google/brya/variants/riven/overridetree.cb b/src/mainboard/google/brya/variants/riven/overridetree.cb
index 411277f..22a1bfc 100644
--- a/src/mainboard/google/brya/variants/riven/overridetree.cb
+++ b/src/mainboard/google/brya/variants/riven/overridetree.cb
@@ -256,6 +256,23 @@
    			device i2c 10 on end
    		end
    		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" = "280"
+				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 16 on end
+			end
+			chip drivers/i2c/hid
    			register "generic.hid" = ""GTCH7503""
    			register "generic.desc" = ""G2 Touchscreen""
    			register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPP_C7_IRQ)"