src/mainboard/protectli/vault_bsw/mainboard.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include <device/device.h>
   4 #include <device/mmio.h>
   5 #include <soc/iomap.h>
   6
   7 #define BIOS_CONTROL_REG        0xFC
   8 #define   BIOS_CONTROL_WPD      (1 << 0)
   9
  10 static void mainboard_enable(struct device *dev)
  11 {
  12         volatile void *addr = (void *)(SPI_BASE_ADDRESS + BIOS_CONTROL_REG);
  13
  14         /* Set Bios Write Protect Disable bit to allow saving MRC cache */
  15         write8(addr, read8(addr) | BIOS_CONTROL_WPD);
  16 }
  17
  18 struct chip_operations mainboard_ops = {
  19         .enable_dev = mainboard_enable,
  20 };