Change in coreboot[master]: chromeec: Provide helper routine to read boardid from Chrome EC

[Furquan Shaikh (Code Review)]

Furquan Shaikh has uploaded this change for review. ( https://review.coreboot.org/21681

Change subject: chromeec: Provide helper routine to read boardid from Chrome EC
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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 
---
M src/ec/google/chromeec/Kconfig
M src/ec/google/chromeec/Makefile.inc
A src/ec/google/chromeec/ec_boardid.c
3 files changed, 36 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/81/21681/1

diff --git a/src/ec/google/chromeec/Kconfig b/src/ec/google/chromeec/Kconfig
index 3e9cb29..f05f157 100644
--- a/src/ec/google/chromeec/Kconfig
+++ b/src/ec/google/chromeec/Kconfig
@@ -11,6 +11,12 @@
      not defined, the memmap data is instead accessed on 900h-9ffh via
      the LPC bus.

+config EC_GOOGLE_CHROMEEC_BOARDID
+	depends on EC_GOOGLE_CHROMEEC
+	def_bool n
+	help
+	  Provides common routine for reading boardid from Chrome EC.
+
 config EC_GOOGLE_CHROMEEC_I2C
    depends on EC_GOOGLE_CHROMEEC
    bool
diff --git a/src/ec/google/chromeec/Makefile.inc b/src/ec/google/chromeec/Makefile.inc
index 2fe6994..7b43f63 100644
--- a/src/ec/google/chromeec/Makefile.inc
+++ b/src/ec/google/chromeec/Makefile.inc
@@ -1,5 +1,8 @@
 ifeq ($(CONFIG_EC_GOOGLE_CHROMEEC),y)

+romstage-$(CONFIG_EC_GOOGLE_CHROMEEC_BOARDID) += ec_boardid.c
+ramstage-$(CONFIG_EC_GOOGLE_CHROMEEC_BOARDID) += ec_boardid.c
+
 bootblock-y += ec.c
 bootblock-$(CONFIG_EC_GOOGLE_CHROMEEC_LPC) += ec_lpc.c
 bootblock-$(CONFIG_EC_GOOGLE_CHROMEEC_MEC) += ec_mec.c
diff --git a/src/ec/google/chromeec/ec_boardid.c b/src/ec/google/chromeec/ec_boardid.c
new file mode 100644
index 0000000..440a5a9
--- /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;
+}