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/*
* 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.
*/
#include <boardid.h>
#include <console/console.h>
#include <gpio.h>
#include <stdlib.h>
uint8_t board_id(void)
{
static int id = -1;
gpio_t gpio[] = {[3] = GPIO(X4), [2] = GPIO(X1), /* X4 is MSB */
[1] = GPIO(T1), [0] = GPIO(Q3),}; /* Q3 is LSB */
if (id < 0) {
id = gpio_base3_value(gpio, ARRAY_SIZE(gpio));
printk(BIOS_SPEW, "Board TRISTATE ID: %d.\n", id);
}
return id;
}
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