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I'd like you to reexamine a change. Please visit
https://review.coreboot.org/c/coreboot/+/85795?usp=email
to look at the new patch set (#3).
Change subject: mb/asrock/z77_extreme4: Enable voltage rail adjustments ......................................................................
mb/asrock/z77_extreme4: Enable voltage rail adjustments
This board has two Nuvoton NCT3933U current DAC chips on SMBus, enabling firmware to adjust several voltage rails. The correct registers and offsets were reverse engineered by adjusting voltages in vendor firmware and observing what it wrote there.
Works with commit 38dcb78ede28 ("nb/sandybridge: Implement automatic DRAM voltage setting") to enable firmware to set the DRAM voltage.
TEST=With few XMP and non-XMP modules. Monitored DRAM voltage on test point VT10 (located near the SLI logo) with a multimeter.
Change-Id: Ic59c0c74f070c7d8ebd8e9c1760fe0b491c06a51 Signed-off-by: Riku Viitanen riku.viitanen@protonmail.com --- M src/mainboard/asrock/z77_extreme4/Kconfig M src/mainboard/asrock/z77_extreme4/Makefile.mk A src/mainboard/asrock/z77_extreme4/romstage.c 3 files changed, 45 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/95/85795/3