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mb/asus/p8z77-m: Ensure RAM stays powered in ACPI S3 suspend 

Enable 3VSBSW# in NCT6779D super I/O like other variants in the family,
needed to maintain power to memory during S3 suspend. Without it
resuming totally fails.

(Enabling it in devicetree is OK; it needs not be done in early
board init.)

TEST=Resuming from S3 works.

Change-Id: Ia8059b2a263ab5c459e54685f046eeb913776473
Signed-off-by: Keith Hui <buurin@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78205
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Kevin Keijzer <kevin@quietlife.nl>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Keith Hui 2023-09-30 11:22:37 -04:00 committed by Felix Held
parent bbb6d5d477
commit e94d7d8264
1 changed files with 1 additions and 0 deletions
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1
src/mainboard/asus/p8x7x-series/variants/p8z77-m/overridetree.cb
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@ -52,6 +52,7 @@ chip northbridge/intel/sandybridge
drq 0xe1 = 0x80 # GP07 high drq 0xe1 = 0x80 # GP07 high
end end
device pnp 2e.a on # ACPI device pnp 2e.a on # ACPI
drq 0xe4 = 0x10 # Enable 3VSBSW#, needed for S3 suspend
drq 0xe7 = 0x11 # HWM reset by LRESET#, 0.5s S3 delay for compatibility drq 0xe7 = 0x11 # HWM reset by LRESET#, 0.5s S3 delay for compatibility
drq 0xf2 = 0x5d # Enable RSTOUT[0-2]# and PME drq 0xf2 = 0x5d # Enable RSTOUT[0-2]# and PME
end end