Change in ...coreboot[master]: soc/intel/skylake: Add device settings for PL4 power limit

[PraveenX Hodagatta Pranesh (Code Review)]

PraveenX Hodagatta Pranesh has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/29808

Change subject: soc/intel/skylake: Add device settings for PL4 power limit
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soc/intel/skylake: Add device settings for PL4 power limit

PL4 is a preemptive CPU package peak power limit,it will never be exceeded.
Power is preemptively lowered before limit is reached.

This change provides option in devicetree and feeds FSP PowerLimit4 UPD for
power limit purpose.

Signed-off-by: Praveen hodagatta pranesh 
Change-Id: I64b5a029104a102e5741e8b37c7992f2693180e8
---
M src/soc/intel/skylake/chip.h
M src/soc/intel/skylake/chip_fsp20.c
2 files changed, 4 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/08/29808/1

diff --git a/src/soc/intel/skylake/chip.h b/src/soc/intel/skylake/chip.h
index b1ffcb2..21dddd4 100644
--- a/src/soc/intel/skylake/chip.h
+++ b/src/soc/intel/skylake/chip.h
@@ -97,6 +97,9 @@
    /* TCC activation offset */
    int tcc_offset;

+	/* Power Limit Related */
+	u32 PowerLimit4;
+
    /* PL2 Override value in Watts */
    u32 tdp_pl2_override;
    /* PL1 Override value in Watts */
diff --git a/src/soc/intel/skylake/chip_fsp20.c b/src/soc/intel/skylake/chip_fsp20.c
index 8a78348..18c2aef 100644
--- a/src/soc/intel/skylake/chip_fsp20.c
+++ b/src/soc/intel/skylake/chip_fsp20.c
@@ -369,6 +369,7 @@

tconfig->PchLockDownGlobalSmi = config->LockDownConfigGlobalSmi;
    tconfig->PchLockDownRtcLock = config->LockDownConfigRtcLock;
+	tconfig->PowerLimit4 = config->PowerLimit4;
    /*
     * To disable HECI, the Psf needs to be left unlocked
     * by FSP till end of post sequence. Based on the devicetree