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mb/google/hatch: Override CPU flex ratio 

This patch overrides CPU flex ratio on hatch in order to get
better boot time numbers in vboot_reference.

BUG=b:142264107
TEST=Able to save ~100ms of platform boot time while running with
lower cpu flex ratio (i.e. freq ~1500MHz)

Without this CL

1100:finished vboot kernel verification                802,443 (148,108)

With this CL

1100:finished vboot kernel verification                685,382 (46,496)

Change-Id: Idd1d1c0c04b1f742f17227a1335f27a956ee940d
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36865
Reviewed-by: V Sowmya <v.sowmya@intel.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Pratikkumar V Prajapati <pratikkumar.v.prajapati@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Subrata Banik 2019-11-18 14:10:35 +05:30
parent 24d0ed7978
commit a017e5fb3d
1 changed files with 3 additions and 0 deletions
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3
src/mainboard/google/hatch/variants/baseboard/devicetree.cb
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@ -194,6 +194,9 @@ chip soc/intel/cannonlake
register "gpio_pm[COMM_3]" = "0" register "gpio_pm[COMM_3]" = "0"
register "gpio_pm[COMM_4]" = "0" register "gpio_pm[COMM_4]" = "0"
# CPU Ratio Override
register "cpu_ratio_override" = "15"
# chipset_lockdown configuration # chipset_lockdown configuration
# Use below format to override value in overridetree.cb if required # Use below format to override value in overridetree.cb if required
# format: # format: