[S] Change in coreboot[master]: mb/google/rex/variants/baseboard/rex: Add CPU power limit values

[Sumeet R Pawnikar (Code Review)]

Attention is currently required from: Tarun Tuli, Subrata Banik, Kapil Porwal.

Sumeet R Pawnikar has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/74754 )

Change subject: mb/google/rex/variants/baseboard/rex: Add CPU power limit values
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mb/google/rex/variants/baseboard/rex: Add CPU power limit values

Add CPU power limit values for rex baseboard

BRANCH=None
BUG=b:270664854
TEST=Built and verified power limit values for 15W SKU on Rex board

Change-Id: If46445157358e3e0f227e26a35b4303fc9189a4b
Signed-off-by: Sumeet Pawnikar 
---
M src/mainboard/google/rex/variants/baseboard/rex/Makefile.inc
A src/mainboard/google/rex/variants/baseboard/rex/ramstage.c
2 files changed, 34 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/54/74754/1

diff --git a/src/mainboard/google/rex/variants/baseboard/rex/Makefile.inc b/src/mainboard/google/rex/variants/baseboard/rex/Makefile.inc
index fd45b94..d9e6c9e 100644
--- a/src/mainboard/google/rex/variants/baseboard/rex/Makefile.inc
+++ b/src/mainboard/google/rex/variants/baseboard/rex/Makefile.inc
@@ -1 +1,2 @@
 romstage-y += memory.c
+romstage-y += ramstage.c
diff --git a/src/mainboard/google/rex/variants/baseboard/rex/ramstage.c b/src/mainboard/google/rex/variants/baseboard/rex/ramstage.c
new file mode 100644
index 0000000..b3c5406
--- /dev/null
+++ b/src/mainboard/google/rex/variants/baseboard/rex/ramstage.c
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <baseboard/variants.h>
+#include <device/pci_ids.h>
+#include <intelblocks/power_limit.h>
+
+const struct cpu_power_limits limits[] = {
+	/* SKU_ID, TDP (Watts), pl1_min, pl1_max, pl2_min, pl2_max, pl4 */
+	/* Following values are for performance config as per document #640982 */
+	{ PCI_DID_INTEL_MTL_P_ID_2, 15, 10000, 15000,  57000,  57000, 114000 },
+};
+
+void variant_devtree_update(void)
+{
+	size_t total_entries = ARRAY_SIZE(limits);
+	variant_update_power_limits(limits, total_entries);
+}