src/soc/amd/common/vboot/vbnv_cmos.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <security/vboot/vbnv.h>
   4 #include <pc80/mc146818rtc.h>
   5
   6 void vbnv_platform_init_cmos(void)
   7 {
   8         /* The 0 argument tells cmos_init not to update CMOS unless it is invalid. */
   9         cmos_init(0);
  10 }
  11
  12 int vbnv_cmos_failed(void)
  13 {
  14         /* If CMOS power has failed, the century will be set to 0xff */
  15         return cmos_read(RTC_CLK_ALTCENTURY) == 0xff;
  16 }