From 07e4cc0cc362a7930d750bf9c1155c09a7010271 Mon Sep 17 00:00:00 2001 From: Subrata Banik Date: Wed, 11 Mar 2026 14:16:11 +0530 Subject: [PATCH] mb/google/fatcat: Set CPU ratio override in devicetree Configure "cpu_ratio_override" to 0x20 (32) for the Fatcat baseboard. This ensures the Panther Lake SoC initializes with the correct base frequency ratio to meet the performance and thermal targets defined for this hardware revision. BUG=none BRANCH=none TEST=Build and boot Fatcat; verify CPU base frequency has updated. Change-Id: I7ea6c7dccaf731bab1256b3297d83518ceea532c Signed-off-by: Subrata Banik Reviewed-on: https://review.coreboot.org/c/coreboot/+/91648 Reviewed-by: Pranava Y N Tested-by: build bot (Jenkins) --- .../google/fatcat/variants/baseboard/fatcat/devicetree.cb | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/mainboard/google/fatcat/variants/baseboard/fatcat/devicetree.cb b/src/mainboard/google/fatcat/variants/baseboard/fatcat/devicetree.cb index 14dbd34db6..7369239307 100644 --- a/src/mainboard/google/fatcat/variants/baseboard/fatcat/devicetree.cb +++ b/src/mainboard/google/fatcat/variants/baseboard/fatcat/devicetree.cb @@ -62,6 +62,9 @@ chip soc/intel/pantherlake # Setting TCC of 100C = Tj max (110) - TCC_Offset (10) register "tcc_offset" = "10" + # CPU Ratio Override + register "cpu_ratio_override" = "0x20" + # Enable Energy Reporting register "pch_pm_energy_report_enable" = "true"