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# Copyright 2021 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
if PLATFORM_EC_MKBP_EVENT
choice
prompt "MKBP delivery method"
default PLATFORM_EC_MKBP_USE_GPIO
help
Select MKBP delivery method
config PLATFORM_EC_MKBP_USE_GPIO
bool "Use GPIO"
help
Select to send MKBP events via GPIO. You should define GPIO_EC_INT_L
in gpio_map.h as output from the EC. The GPIO is used to indicate an
event is ready for serving by the AP.
config PLATFORM_EC_MKBP_USE_HOST_EVENT
bool "Use host event"
help
Select to send MKBP events via host event.
config PLATFORM_EC_MKBP_USE_GPIO_AND_HOST_EVENT
bool "Use GPIO and host event"
help
MKBP events are notified by using both a GPIO and a host event.
You should use this if you are using a GPIO to notify the AP of an MKBP
event, and you need an MKBP event to wake the AP in suspend and the
AP cannot wake from the GPIO. Since you are using both a GPIO and
a hostevent for the notification, make sure that the S0 hostevent mask
does NOT include MKBP events. Otherwise, you will have multiple
consumers for a single event. However, make sure to configure the
host event *sleep* mask in coreboot to include MKBP events. In order to
prevent all MKBP events from waking the AP, use
CONFIG_MKBP_EVENT_WAKEUP_MASK to filter the events.
config PLATFORM_EC_MKBP_USE_CUSTOM
bool "Use custom method"
help
Select to send MKBP events using custom method. You need to define
mkbp_set_host_active_via_custom() which is called when there's a MKBP event
to be sent. for more about the function, refer to mkbp_event.h.
endchoice
endif # PLATFORM_EC_MKBP_EVENT
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