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mb/google/nissa/var/craask: Add elan touchscreen support

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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:430467732
TEST=emerge-nissa coreboot and elan touchscreen can work well.

Change-Id: I08a32eae272d5ef93f1c89bcb96b9ba50c037624
Signed-off-by: David Wu <david_wu@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/88370
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>
This commit is contained in:
David Wu 2025-07-09 17:26:52 +08:00 • committed by Matt DeVillier
commit f74027d5ae
1 changed files with 20 additions and 0 deletions
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20
src/mainboard/google/brya/variants/craask/overridetree.cb
View file

@ -395,6 +395,26 @@ chip soc/intel/alderlake
probe TS_SOURCE TS_UNPROVISIONED
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 "generic.use_gpio_for_status" = "true"
register "hid_desc_reg_offset" = "0x01"
device i2c 16 on
probe TS_SOURCE TS_UNPROVISIONED
end
end
chip drivers/i2c/hid
register "generic.hid" = ""ILTK0001""
register "generic.desc" = ""ILITEK Touchscreen""