board_id.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <boardid.h>
#include <ec/acpi/ec.h>
#include <ec/google/chromeec/ec.h>
#include <types.h>
#include "board_id.h"
 
static uint32_t get_board_id_via_ext_ec(void)
{
        uint32_t id = BOARD_ID_INIT;
 
        if (google_chromeec_get_board_version(&id))
                id = BOARD_ID_UNKNOWN;
 
        return id;
}
 
/* Get Board ID via EC I/O port write/read */
int get_board_id(void)
{
        MAYBE_STATIC_NONZERO int id = -1;
 
        if (id < 0) {
                if (CONFIG(EC_GOOGLE_CHROMEEC)) {
                        id = get_board_id_via_ext_ec();
                } else {
                        if (send_ec_command(EC_FAB_ID_CMD) == 0) {
                                id = recv_ec_data() << 8;
                                id |= recv_ec_data();
                        }
                }
        }
        return (id & BOARD_ID_MASK);
}