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soc/intel/cannonlake: Enable ACPI timer emulation if PM timer is disabled 

Add a check to enable ACPI timer emulation only when the APCI PM timer
is disabled.

Change-Id: I21c0b89218d0df9336e0b0e15f1b575b8508fb96
Signed-off-by: Aamir Bohra <aamir.bohra@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34563
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
This commit is contained in:
Aamir Bohra 2019-07-25 11:52:35 +05:30 committed by Subrata Banik
parent c47c6405e8
commit e5269a8fd9
1 changed files with 7 additions and 1 deletions
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8
src/soc/intel/cannonlake/cpu.c
View File

@ -384,8 +384,14 @@ static void configure_thermal_target(void)
*/ */
static void enable_pm_timer_emulation(void) static void enable_pm_timer_emulation(void)
{ {
/* ACPI PM timer emulation */ const struct soc_intel_cannonlake_config *config;
msr_t msr; msr_t msr;
config = config_of_path(SA_DEVFN_ROOT);
/* Enable PM timer emulation only if ACPI PM timer is disabled */
if (!config->PmTimerDisabled)
return;
/* /*
* The derived frequency is calculated as follows: * The derived frequency is calculated as follows:
* (CTC_FREQ * msr[63:32]) >> 32 = target frequency. * (CTC_FREQ * msr[63:32]) >> 32 = target frequency.