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

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This reverts commit e5269a8fd975fa0cba0655cd41f7f8cc99a1feb8.

Reason for revert: BIOS spec says, it's recommended to always enable
emulation (regardless of the OS version).

Change-Id: If0d7fa6f9766c7c4e2fa9e846c179adc6a4e1681
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45000
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Michael Niewöhner 2020-10-05 16:56:31 +00:00 committed by Patrick Georgi
parent 4eedd938fa
commit 4b6ff98e84
1 changed files with 0 additions and 6 deletions
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6
src/soc/intel/cannonlake/cpu.c
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@ -112,14 +112,8 @@ static void configure_dca_cap(void)
*/
static void enable_pm_timer_emulation(void)
{
const struct soc_intel_cannonlake_config *config;
msr_t msr;
config = config_of_soc();
/* Enable PM timer emulation only if ACPI PM timer is disabled */
if (!config->PmTimerDisabled)
return;
/*
* The derived frequency is calculated as follows:
* (CTC_FREQ * msr[63:32]) >> 32 = target frequency.