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mainboard/google/snappy: Add PowerResource for ELAN touchscreen 

Define reset_gpio and enable_gpio for touchscreen device so that
when kernel puts this device into D3, we put the device into reset.
PowerResource _ON and _OFF routines are used to put the device
into D0 and D3 states.

BUG=chrome-os-partner:59034
BRANCH=master
TEST=emerge-snappy coreboot chromeos-bootimage

Change-Id: I08c05d06b2812a33b3fdff9b42b2a8e0653dd8b4
Signed-off-by: Wisley Chen <wisley.chen@quantatw.com>
Reviewed-on: https://review.coreboot.org/17366
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Wisley Chen 2016-11-10 10:34:58 -05:00 committed by Martin Roth
parent ce0a564198
commit 01ba8cf7a7
1 changed files with 4 additions and 0 deletions
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4
src/mainboard/google/reef/variants/snappy/devicetree.cb
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@ -175,6 +175,10 @@ chip soc/intel/apollolake
register "desc" = ""ELAN Touchscreen""
register "irq" = "IRQ_EDGE_LOW(GPIO_21_IRQ)"
register "probed" = "1"
register "reset_gpio" = "GPIO_36"
register "reset_delay_ms" = "20"
register "enable_gpio" = "GPIO_152"
register "enable_delay_ms" = "1"
device i2c 10 on end
end
end # - I2C 3