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| author | Duncan Laurie <dlaurie@chromium.org> | 2015-12-10 01:01:59 -0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2016-01-18 12:09:37 +0100 |
| commit | ddd9f1a5a65db7a461ffb6576ca45acf56c2b000 (patch) | |
| tree | 58c44240e03ea6ea1d4d3328d07c8dec8f741080 | |
| parent | 63f8c0af4ba934f0a9eaefaed6ae411404962196 (diff) | |
| download | coreboot-ddd9f1a5a65db7a461ffb6576ca45acf56c2b000.tar.xz | |
intel/skylake: Add devicetree setting for DDR frequency limit UPD
There is a UPD setting exposed by FSP that allows the DDR
frequency to be limited. Expose this for devicetree.
BUG=chrome-os-partner:47346
BRANCH=none
TEST=tested by limiting DDR frequency to 1600 on chell EVT
Change-Id: I1f17b221d9fa4c2dd1e8c5f403deb0f2bc0493a7
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 91f760ad19823225f7e5bd2dc690164ed253e220
Original-Change-Id: Ibcd4a65a9cfd7d32fbf2ba8843ab25da8e9cf28a
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/317243
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/12981
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
| -rw-r--r-- | src/soc/intel/skylake/chip.h | 6 | ||||
| -rw-r--r-- | src/soc/intel/skylake/romstage/romstage.c | 1 |
2 files changed, 7 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/chip.h b/src/soc/intel/skylake/chip.h index 1c45470b9f..7e401ebb8e 100644 --- a/src/soc/intel/skylake/chip.h +++ b/src/soc/intel/skylake/chip.h @@ -113,6 +113,12 @@ struct soc_intel_skylake_config { u32 TsegSize; u16 MmioSize; + /* + * DDR Frequency Limit + * 0(Auto), 1067, 1333, 1600, 1867, 2133, 2400 + */ + u16 DdrFreqLimit; + /* Probeless Trace function */ u8 ProbelessTrace; diff --git a/src/soc/intel/skylake/romstage/romstage.c b/src/soc/intel/skylake/romstage/romstage.c index 5481004121..31f7fc29da 100644 --- a/src/soc/intel/skylake/romstage/romstage.c +++ b/src/soc/intel/skylake/romstage/romstage.c @@ -92,6 +92,7 @@ void soc_memory_init_params(struct romstage_params *params, upd->EnableTraceHub = config->EnableTraceHub; upd->SaGv = config->SaGv; upd->RMT = config->Rmt; + upd->DdrFreqLimit = config->DdrFreqLimit; } void soc_display_memory_init_params(const MEMORY_INIT_UPD *old, |