ec: Add a chipset reset hook

There are hooks for chipset power sequencing but not one to indicate
that the system has reset at runtime.  Add a hook for this and
implement for lm4 and mec1322.  The hook is notified on any platform
reset, including those that happen on the way into S3/S5 state.

There is a new config variable added because the hook is notified in
the interrupt handler and needs a deferrable function that needs to
be added to every board.

BUG=chrome-os-partner:46049
BRANCH=none
TEST=tested on glados and samus

Change-Id: I3be639414e18586344e0ec84632a50dfc1df586b
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/315221
Commit-Ready: Aaron Durbin <adurbin@chromium.org>
Tested-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Shawn N <shawnn@chromium.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/hooks.h b/include/hooks.h
index 49617aba95..c2b48ccd6c 100644
--- a/include/hooks.h
+++ b/include/hooks.h
@@ -109,6 +109,13 @@ enum hook_type {
 	HOOK_CHIPSET_SHUTDOWN,
 
 	/*
+	 * System reset in S0.  All rails are still up.
+	 *
+	 * Hook routines are called from the chipset task.
+	 */
+	HOOK_CHIPSET_RESET,
+
+	/*
 	 * AC power plugged in or removed.
 	 *
 	 * Hook routines are called from the TICK task.