diff options
Diffstat (limited to 'src/soc/intel/broadwell/pmutil.c')
| -rw-r--r-- | src/soc/intel/broadwell/pmutil.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/pmutil.c b/src/soc/intel/broadwell/pmutil.c index 43c4744945..7cf184ee05 100644 --- a/src/soc/intel/broadwell/pmutil.c +++ b/src/soc/intel/broadwell/pmutil.c @@ -446,3 +446,20 @@ int acpi_sci_irq(void) printk(BIOS_DEBUG, "SCI is IRQ%d\n", sci_irq); return sci_irq; } + +int rtc_failure(void) +{ + u8 reg8; + int rtc_failed; + device_t dev = PCH_DEV_LPC; + + reg8 = pci_read_config8(dev, GEN_PMCON_3); + rtc_failed = reg8 & RTC_BATTERY_DEAD; + if (rtc_failed) { + reg8 &= ~RTC_BATTERY_DEAD; + pci_write_config8(dev, GEN_PMCON_3, reg8); + printk(BIOS_DEBUG, "rtc_failed = 0x%x\n", rtc_failed); + } + + return !!rtc_failed; +} |