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google/snappy: 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=None
BRANCH=None
TEST=Verified that touchscreen works properly on boot-up and after
suspend/resume.

Change-Id: I78e0c35f60289afe338d140d90784a433ca534ae
Signed-off-by: Wisley Chen <wisley.chen@quantatw.com>
Reviewed-on: https://review.coreboot.org/18163
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This commit is contained in:
Wisley Chen 2017-01-18 10:47:37 +08:00 committed by Martin Roth
parent 32997fb0bc
commit bf68f2286c
1 changed files with 10 additions and 0 deletions
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10
src/mainboard/google/reef/variants/snappy/devicetree.cb
View File

@ -175,6 +175,16 @@ chip soc/intel/apollolake
register "desc" = ""ELAN Touchscreen""
register "irq" = "IRQ_EDGE_LOW(GPIO_21_IRQ)"
register "probed" = "1"
register "pwr_mgmt_type" = "GPIO_EXPORT"
register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_36)"
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
end
end # - I2C 3