/* SPDX-License-Identifier: GPL-2.0-only */ #include <security/vboot/vbnv.h> #include <pc80/mc146818rtc.h> int vbnv_cmos_failed(void) { /* If CMOS power has failed, the century will be set to 0xff */ return cmos_read(RTC_CLK_ALTCENTURY) == 0xff; }