src/mainboard/google/nyan_big/boardid.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <boardid.h>
   4 #include <console/console.h>
   5 #include <gpio.h>
   6
   7 uint32_t board_id(void)
   8 {
   9         static int id = -1;
  10         gpio_t gpio[] = {[3] = GPIO(X4), [2] = GPIO(X1),        /* X4 is MSB */
  11                          [1] = GPIO(T1), [0] = GPIO(Q3),};      /* Q3 is LSB */
  12
  13         if (id < 0) {
  14                 id = gpio_base3_value(gpio, ARRAY_SIZE(gpio));
  15
  16                 printk(BIOS_SPEW, "Board TRISTATE ID: %d.\n", id);
  17         }
  18
  19         return id;
  20 }