diff options
Diffstat (limited to 'src/soc/intel/icelake/pmutil.c')
| -rw-r--r-- | src/soc/intel/icelake/pmutil.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/src/soc/intel/icelake/pmutil.c b/src/soc/intel/icelake/pmutil.c index 108b919d78..f552a8c8e5 100644 --- a/src/soc/intel/icelake/pmutil.c +++ b/src/soc/intel/icelake/pmutil.c @@ -178,6 +178,22 @@ static int rtc_failed(uint32_t gen_pmcon_b) return !!(gen_pmcon_b & RTC_BATTERY_DEAD); } +static void clear_rtc_failed(void) +{ + clrbits8(pmc_mmio_regs() + GEN_PMCON_B, RTC_BATTERY_DEAD); +} + +static int check_rtc_failed(uint32_t gen_pmcon_b) +{ + const int failed = rtc_failed(gen_pmcon_b); + if (failed) { + clear_rtc_failed(); + printk(BIOS_DEBUG, "rtc_failed = 0x%x\n", failed); + } + + return failed; +} + int soc_get_rtc_failed(void) { const struct chipset_power_state *ps; @@ -185,12 +201,12 @@ int soc_get_rtc_failed(void) if (acpi_pm_state_for_rtc(&ps) < 0) return 1; - return rtc_failed(ps->gen_pmcon_b); + return check_rtc_failed(ps->gen_pmcon_b); } int vbnv_cmos_failed(void) { - return rtc_failed(read32(pmc_mmio_regs() + GEN_PMCON_B)); + return check_rtc_failed(read32(pmc_mmio_regs() + GEN_PMCON_B)); } static inline int deep_s3_enabled(void) |