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google/reef: Use exported GPIOs and ACPI regulator for touchscreen 

ELAN touchscreen device expects firmware to export GPIOs and ACPI
regulators for managing power to the device. Thus, provide the
required ACPI elements for OS driver to properly manage this device.

BUG=chrome-os-partner:60194
BRANCH=None
TEST=Verified that touchscreen works properly on boot-up and after
suspend/resume.

Change-Id: I298ca5de9c0ae302309d87e3dffb65f9be1e882e
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/17799
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
This commit is contained in:
Furquan Shaikh 2016-12-13 09:15:07 -08:00 committed by Martin Roth
parent 60f3217ed9
commit 2fe0d75d42
2 changed files with 11 additions and 1 deletions
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3
src/mainboard/google/reef/Kconfig
View File

@ -50,6 +50,9 @@ config DRIVERS_I2C_WACOM
config DRIVERS_PS2_KEYBOARD config DRIVERS_PS2_KEYBOARD
default y default y
config DRIVERS_GENERIC_GPIO_REGULATOR
default y
config MAINBOARD_DIR config MAINBOARD_DIR
string string
default google/reef default google/reef

9
src/mainboard/google/reef/variants/baseboard/devicetree.cb
View File

@ -179,7 +179,14 @@ chip soc/intel/apollolake
register "probed" = "1" register "probed" = "1"
register "pwr_mgmt_type" = "GPIO_EXPORT" register "pwr_mgmt_type" = "GPIO_EXPORT"
register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_36)" register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_36)"
register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_152)"
chip drivers/generic/gpio_regulator
register "name" = ""vcc33""
register "gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_152)"
register "enabled_on_boot" = "1"
device generic 0 on end
end
device i2c 10 on end device i2c 10 on end
end end
end # - I2C 3 end # - I2C 3