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mb/google/nissa/var/riven: Add focaltech touchscreen support

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This change adds the necessary configuration for the focaltech
touchscreen (FTSC1000) device, connected to I2C bus 38.

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

Datasheet: FT8112_Data_Sheet_V0.2_HKC20240415.pdf

BUG=b:426038745
TEST=emerge-nissa coreboot and focaltech touchscreen can work well.

Change-Id: I478924fbebf2a5ecd60bad48b37bfa6581100601
Signed-off-by: David Wu <david_wu@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/88174
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Eric Lai <ericllai@google.com>
This commit is contained in:
David Wu 2025-06-23 17:25:17 +08:00 • committed by Matt DeVillier
commit 110aebb4d2
1 changed files with 14 additions and 0 deletions
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14
src/mainboard/google/brya/variants/riven/overridetree.cb
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@ -289,6 +289,20 @@ chip soc/intel/alderlake
register "hid_desc_reg_offset" = "0x01"
device i2c 40 on end
end
chip drivers/i2c/hid
register "generic.hid" = ""FTSC1000""
register "generic.desc" = ""Focal 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.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_C0)"
register "generic.enable_delay_ms" = "6"
register "generic.has_power_resource" = "1"
register "generic.use_gpio_for_status" = "true"
register "hid_desc_reg_offset" = "0x01"
device i2c 38 on end
end
chip drivers/generic/gpio_keys
register "name" = ""PENH""
register "gpio" = "ACPI_GPIO_INPUT_ACTIVE_LOW(GPP_F13)"