ec/google/wilco: Support board_id with EC provided ID

The EC can return a board ID value similar to the Chrome EC.
In order to use this for the board version returned by SMBIOS
this commit implements the board_id() function for mainboards
that use this EC.

BUG=b:123261132
TEST=Check /sys/class/dmi/id/board_version to see that it
is reflecting the value that the EC provides.

Change-Id: I3fbe0dc886701f37d2424fe7a2867fd860fa1ec0
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32276
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/src/ec/google/wilco/boardid.c b/src/ec/google/wilco/boardid.c
new file mode 100644
index 0000000000..e602e6e0c7
--- /dev/null
+++ b/src/ec/google/wilco/boardid.c
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <boardid.h>
+#include "commands.h"
+
+uint32_t board_id(void)
+{
+	MAYBE_STATIC uint32_t id = BOARD_ID_INIT;
+
+	if (id == BOARD_ID_INIT) {
+		uint8_t ec_id;
+		if (wilco_ec_get_board_id(&ec_id) <= 0)
+			id = BOARD_ID_UNKNOWN;
+		else
+			id = ec_id;
+	}
+
+	return id;
+}