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authorWisley Chen <wisley.chen@quantatw.com>2017-01-18 10:47:37 +0800
committerMartin Roth <martinroth@google.com>2017-01-20 17:22:14 +0100
commitbf68f2286c4850f175a3ea350ebfa67a463f3f33 (patch)
tree805a8c4f26c15bea6640e730fb6bd8e4d37aad3a /src
parent32997fb0bcb9f4183789331a91fd83138776b96f (diff)
downloadcoreboot-bf68f2286c4850f175a3ea350ebfa67a463f3f33.tar.xz
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>
Diffstat (limited to 'src')
-rw-r--r--src/mainboard/google/reef/variants/snappy/devicetree.cb10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/mainboard/google/reef/variants/snappy/devicetree.cb b/src/mainboard/google/reef/variants/snappy/devicetree.cb
index d420481180..d249e53952 100644
--- a/src/mainboard/google/reef/variants/snappy/devicetree.cb
+++ b/src/mainboard/google/reef/variants/snappy/devicetree.cb
@@ -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