diff options
| author | Michael Niewöhner <foss@mniewoehner.de> | 2020-10-04 14:48:05 +0200 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-10-21 07:14:00 +0000 |
| commit | dadcbfbe8c682c89b277fdbdfdd26cabd15fc20a (patch) | |
| tree | 34382c8a51e3a496a3acbd9f0b198c520ef97d9a /src/soc/intel/alderlake/cpu.c | |
| parent | fe6070f7280cfcc41fffded67789439531e8ab49 (diff) | |
soc/intel: convert XTAL frequency constant to Kconfig
This converts the constant for the XTAL frequency to a Kconfig option.
Change-Id: I1382dd274eeb9cb748f94c34f5d9a83880624c18
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46018
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Diffstat (limited to 'src/soc/intel/alderlake/cpu.c')
| -rw-r--r-- | src/soc/intel/alderlake/cpu.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/soc/intel/alderlake/cpu.c b/src/soc/intel/alderlake/cpu.c index ee8051d568..e6a21c170e 100644 --- a/src/soc/intel/alderlake/cpu.c +++ b/src/soc/intel/alderlake/cpu.c @@ -111,15 +111,17 @@ static void configure_dca_cap(void) static void enable_pm_timer_emulation(void) { - /* ACPI PM timer emulation */ msr_t msr; + + if (!CONFIG_CPU_XTAL_HZ) + return; + /* * The derived frequency is calculated as follows: - * (CTC_FREQ * msr[63:32]) >> 32 = target frequency. - * Back solve the multiplier so the 3.579545MHz ACPI timer - * frequency is used. + * (clock * msr[63:32]) >> 32 = target frequency. + * Back solve the multiplier so the 3.579545MHz ACPI timer frequency is used. */ - msr.hi = (3579545ULL << 32) / CTC_FREQ; + msr.hi = (3579545ULL << 32) / CONFIG_CPU_XTAL_HZ; /* Set PM1 timer IO port and enable */ msr.lo = (EMULATE_DELAY_VALUE << EMULATE_DELAY_OFFSET_VALUE) | EMULATE_PM_TMR_EN | (ACPI_BASE_ADDRESS + PM1_TMR); |