Change in coreboot[master]: soc/intel/common: round PM Timer emulation frequency multiplier

[Michael Niewöhner (Code Review)]

Michael Niewöhner has submitted this change. ( https://review.coreboot.org/c/coreboot/+/57943 )

Change subject: soc/intel/common: round PM Timer emulation frequency multiplier
......................................................................

soc/intel/common: round PM Timer emulation frequency multiplier

Round the PM Timer emulation frequency multiplier to the closest value
to increase precision.

Test: compared hexdumps of CML binaries for the expected result:
      before: 0x262E8B51, after: 0x262E8B52

Change-Id: Iafd645c248fc17943ea4be558ed7d01a301ba809
Signed-off-by: Michael Niewöhner 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57943
Reviewed-by: Nico Huber 
Tested-by: build bot (Jenkins) 
---
M src/soc/intel/common/block/cpu/pm_timer_emulation.c
1 file changed, 2 insertions(+), 1 deletion(-)

Approvals:
  build bot (Jenkins): Verified
  Nico Huber: Looks good to me, approved

diff --git a/src/soc/intel/common/block/cpu/pm_timer_emulation.c b/src/soc/intel/common/block/cpu/pm_timer_emulation.c
index 8f56da5..0436e04 100644
--- a/src/soc/intel/common/block/cpu/pm_timer_emulation.c
+++ b/src/soc/intel/common/block/cpu/pm_timer_emulation.c
@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */

+#include <commonlib/helpers.h>
 #include <cpu/x86/msr.h>
 #include <intelblocks/cpulib.h>
 #include <intelblocks/msr.h>
@@ -18,7 +19,7 @@
     * (clock * msr[63:32]) >> 32 = target frequency.
     * Back solve the multiplier so the 3.579545MHz ACPI timer frequency is used.
     */
-	msr.hi = (3579545ULL << 32) / CONFIG_CPU_XTAL_HZ;
+	msr.hi = DIV_ROUND_CLOSEST((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);

4 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.