chromeec: Provide helper routine to read boardid from Chrome EC

Instead of duplicating the code across multiple mainboards, provide a
helper function to read boardid from Chrome EC.

Change-Id: I2008de7032bc880e90b2c3c385b2a67bfb8724cc
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/21681
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/src/ec/google/chromeec/ec_boardid.c b/src/ec/google/chromeec/ec_boardid.c
new file mode 100644
index 0000000000..440a5a9f07
--- /dev/null
+++ b/src/ec/google/chromeec/ec_boardid.c
@@ -0,0 +1,27 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 Google Inc.
+ *
+ * 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 <ec/google/chromeec/ec.h>
+
+uint8_t board_id(void)
+{
+	MAYBE_STATIC int id = -1;
+
+	if (id < 0)
+		id = google_chromeec_get_board_version();
+
+	return id;
+}