1 files changed, 45 insertions, 0 deletions
diff --git a/src/mainboard/google/nyan_blaze/boardid.c b/src/mainboard/google/nyan_blaze/boardid.c
new file mode 100644
index 0000000000..23b1c6adff
--- /dev/null
+++ b/src/mainboard/google/nyan_blaze/boardid.c
@@ -0,0 +1,45 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <console/console.h>
+#include <soc/nvidia/tegra124/gpio.h>
+#include <stdlib.h>
+
+#include "boardid.h"
+
+uint8_t board_id(void)
+{
+	static int id = -1;
+
+	if (id < 0) {
+		gpio_t gpio[] = {GPIO(Q3), GPIO(T1), GPIO(X1), GPIO(X4)};
+		int value[ARRAY_SIZE(gpio)];
+
+		gpio_get_in_tristate_values(gpio, ARRAY_SIZE(gpio), value);
+
+		/* A gpio state is encoded in every two-bit */
+		id = value[0] << 0 |
+		     value[1] << 2 |
+		     value[2] << 4 |
+		     value[3] << 6;
+		printk(BIOS_SPEW, "Board TRISTATE ID: %#x.\n", id);
+	}
+
+	return id;
+}