diff options
Diffstat (limited to 'src/soc/intel/xeon_sp/finalize.c')
| -rw-r--r-- | src/soc/intel/xeon_sp/finalize.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/soc/intel/xeon_sp/finalize.c b/src/soc/intel/xeon_sp/finalize.c index 044c1cc138..76e3ef1125 100644 --- a/src/soc/intel/xeon_sp/finalize.c +++ b/src/soc/intel/xeon_sp/finalize.c @@ -7,6 +7,7 @@ #include <device/pci.h> #include <intelpch/lockdown.h> #include <soc/pci_devs.h> +#include <soc/pm.h> #include <soc/util.h> #include "chip.h" @@ -26,6 +27,19 @@ static void soc_finalize(void *unused) { printk(BIOS_DEBUG, "Finalizing chipset.\n"); + /* + * Disable ACPI PM timer based on Kconfig + * + * Disabling ACPI PM timer is necessary for XTAL OSC shutdown. + * Disabling ACPI PM timer also switches off TCO. + * + * Note: In contrast to other platforms supporting PM timer emulation, + * disabling the PM timer must be done *after* FSP has run on Xeon-SP, + * because FSP makes use of the PM timer. + */ + if (!CONFIG(USE_PM_ACPI_TIMER)) + setbits8(pmc_mmio_regs() + PCH_PWRM_ACPI_TMR_CTL, ACPI_TIM_DIS); + apm_control(APM_CNT_FINALIZE); lock_pam0123(); |