3 files changed, 52 insertions, 0 deletions
diff --git a/src/mainboard/google/rex/variants/deku/Makefile.mk b/src/mainboard/google/rex/variants/deku/Makefile.mk
index 91f031e7a4..090dd5be73 100644
--- a/src/mainboard/google/rex/variants/deku/Makefile.mk
+++ b/src/mainboard/google/rex/variants/deku/Makefile.mk
@@ -3,3 +3,4 @@
 bootblock-y += gpio.c
 romstage-y += gpio.c
 ramstage-y += gpio.c
+ramstage-y += ramstage.c
diff --git a/src/mainboard/google/rex/variants/deku/overridetree.cb b/src/mainboard/google/rex/variants/deku/overridetree.cb
index 496af459e3..fcacbead86 100644
--- a/src/mainboard/google/rex/variants/deku/overridetree.cb
+++ b/src/mainboard/google/rex/variants/deku/overridetree.cb
@@ -64,6 +64,7 @@ chip soc/intel/meteorlake
 	}"
 
 	register "psys_pmax_watts" = "180"
+	register "psys_pl2_watts"  = "178"
 
 	# As per doc 640982, Intel MTL-U 28W CPU supports FVM on GT and SA
 	# The ICC Limit is represented in 1/4 A increments, i.e., a value of 400 = 100A
diff --git a/src/mainboard/google/rex/variants/deku/ramstage.c b/src/mainboard/google/rex/variants/deku/ramstage.c
new file mode 100644
index 0000000000..7cb324dd67
--- /dev/null
+++ b/src/mainboard/google/rex/variants/deku/ramstage.c
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <baseboard/variants.h>
+#include <chip.h>
+#include <intelblocks/power_limit.h>
+
+/*
+ * SKU_ID, TDP (Watts), pl1_min (milliWatts), pl1_max (milliWatts),
+ * pl2_min (milliWatts), pl2_max (milliWatts), pl4 (milliWatts)
+ * Following values are for performance config as per document #640982
+ */
+const struct cpu_tdp_power_limits variant_limits[] = {
+	{
+		.mch_id = PCI_DID_INTEL_MTL_P_ID_1,
+		.cpu_tdp = 28,
+		.pl1_min_power = 19000,
+		.pl1_max_power = 28000,
+		.pl2_min_power = 64000,
+		.pl2_max_power = 64000,
+		.pl4_power = 120000
+	},
+	{
+		.mch_id = PCI_DID_INTEL_MTL_P_ID_3,
+		.cpu_tdp = 28,
+		.pl1_min_power = 19000,
+		.pl1_max_power = 28000,
+		.pl2_min_power = 64000,
+		.pl2_max_power = 64000,
+		.pl4_power = 120000
+	},
+};
+
+void variant_devtree_update(void)
+{
+	struct soc_power_limits_config *soc_config;
+	struct soc_intel_meteorlake_config *config = config_of_soc();
+
+	soc_config = variant_get_soc_power_limit_config();
+	if (soc_config == NULL)
+		return;
+
+	if (config->psys_pl2_watts) {
+		soc_config->tdp_psyspl2 = config->psys_pl2_watts;
+		printk(BIOS_INFO, "Overriding PsysPL2 (%u)\n", soc_config->tdp_psyspl2);
+	}
+
+	const struct cpu_tdp_power_limits *limits = variant_limits;
+	size_t total_entries = ARRAY_SIZE(variant_limits);
+	variant_update_cpu_power_limits(limits, total_entries);
+}