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EC maintains a FIFO of all MKBP events and sets host event whenever
a new entry is added to the FIFO. Clearing only the host event for
MKBP creates an inconsistent state where there are pending MKBP events
in the FIFO but host event for MKBP is cleared. In order to maintain a
consistent view, host should clear all MKBP events in the FIFO if host
event is being cleared.
This change drains out all the MKBP events in the FIFO when
clear_pending_events is called.
TEST=Verified by adding debug logs in EC to verify that all the MKBP
events that occur before clear_pending_events is called get cleared
from the FIFO.
Change-Id: I131722dc01608dff30230fe341e6b23ae4cc409e
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/22005
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
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Add support for the new EC device event interface which is used to
report events from devices that are connected behind the EC.
This can be used to differentiate wake sources from the EC in the case
that the EC has the wake pins from various devices.
This can be used in case the AP is unable to directly wake from the
device itself, for example when using the Deep S3 state on Intel
platforms only a few pins can directly wake the AP.
BUG=b:30624430
TEST=build google/* boards that use chrome EC. Feature is used and
tested further in a subsequent commit.
Change-Id: I5126c6d6ffb6b0ef6e8db8dcd5aec62db925a371
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/20426
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
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The mainboards which use the Chrome EC duplicate the
same logic in the mainboard smi handler. Provide common
helper functions for those boards to utilize.
BUG=chrome-os-partner:54977
Change-Id: I0d3ad617d211ecbea302114b17ad700b935e24d5
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15685
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins)
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