Subrata Banik has submitted this change. ( https://review.coreboot.org/c/coreboot/+/36865 )
Change subject: mb/google/hatch: Override CPU flex ratio ......................................................................
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 --- M src/mainboard/google/hatch/variants/baseboard/devicetree.cb 1 file changed, 3 insertions(+), 0 deletions(-)
Approvals: build bot (Jenkins): Verified Pratikkumar V Prajapati: Looks good to me, but someone else must approve V Sowmya: Looks good to me, approved Tim Wawrzynczak: Looks good to me, approved
diff --git a/src/mainboard/google/hatch/variants/baseboard/devicetree.cb b/src/mainboard/google/hatch/variants/baseboard/devicetree.cb index b4d7afd..e0291bb 100644 --- a/src/mainboard/google/hatch/variants/baseboard/devicetree.cb +++ b/src/mainboard/google/hatch/variants/baseboard/devicetree.cb @@ -194,6 +194,9 @@ register "gpio_pm[COMM_3]" = "0" register "gpio_pm[COMM_4]" = "0"
+ # CPU Ratio Override + register "cpu_ratio_override" = "15" + # chipset_lockdown configuration # Use below format to override value in overridetree.cb if required # format: