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chromeec: Add support for controlling USB port power

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This maps a bit field to the EC (EC_ACPI_MEM_USB_PORT_POWER) that can be
used to control the power state of up to 8 individual USB ports. Some
Chromeboxes have their GPIO pins for controlling USB port power wired to
the EC, so they cannot be accessed directly by coreboot.

Change-Id: I6a362c2b868b296031a4170c15e7c0dedbb870b8
Signed-off-by: Emil Lundmark <lndmrk@chromium.org>
Reviewed-on: https://review.coreboot.org/26471
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Emil Lundmark
2018-05-22 19:31:37 +02:00
committed by Patrick Georgi
parent 5eec229d96
commit 9d5f9f2671
2 changed files with 28 additions and 0 deletions
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7
src/ec/google/chromeec/Kconfig
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@@ -11,6 +11,13 @@ config EC_GOOGLE_CHROMEEC_ACPI_MEMMAP
not defined, the memmap data is instead accessed on 900h-9ffh via
the LPC bus.
config EC_GOOGLE_CHROMEEC_ACPI_USB_PORT_POWER
depends on EC_GOOGLE_CHROMEEC
def_bool n
help
Expose methods for enabling and disabling port power on individual USB
ports through the EC.
config EC_GOOGLE_CHROMEEC_BOARDID
depends on EC_GOOGLE_CHROMEEC
def_bool n