src/drivers/generic/cbfs-serial/cbfs-serial.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <cbfs.h>
   4 #include <device/device.h>
   5 #include <smbios.h>
   6 #include <string.h>
   7
   8 #define MAX_SERIAL_LENGTH 0x100
   9
  10 const char *smbios_mainboard_serial_number(void)
  11 {
  12         static char serial_number[MAX_SERIAL_LENGTH + 1] = {0};
  13
  14         if (serial_number[0] != 0)
  15                 return serial_number;
  16
  17         size_t serial_len = cbfs_load("serial_number", serial_number, MAX_SERIAL_LENGTH);
  18         if (serial_len) {
  19                 serial_number[serial_len] = '\0';
  20                 return serial_number;
  21         }
  22
  23         strncpy(serial_number, CONFIG_MAINBOARD_SERIAL_NUMBER,
  24                         MAX_SERIAL_LENGTH);
  25
  26         return serial_number;
  27 }