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google/panther: Disable DEVSLP for SATA

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Some SSD modules don't support DEVSLP correctly due to their
firmware. Since the power savings are minimal, don't use
DEVSLP to prevent potential problems. Some of the symptoms
are that sometimes this causes USB devices to not work properly.

BUG=chrome-os-partner:23186,
BRANCH=panther
TEST=Boot tested on Panther

Change-Id: Iba3f721c73e0e760b6a9861ca23480ddb923df40
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: https://chromium-review.googlesource.com/181957
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
This commit is contained in:
Stefan Reinauer 2014-01-08 15:20:59 -08:00 • committed by chrome-internal-fetch
commit 433287d92b
1 changed files with 1 additions and 0 deletions
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src/mainboard/google/panther/devicetree.cb
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@ -55,6 +55,7 @@ chip northbridge/intel/haswell
register "ide_legacy_combined" = "0x0"
register "sata_ahci" = "0x1"
register "sata_port_map" = "0x1"
register "sata_devslp_disable" = "0x1"
register "sio_acpi_mode" = "0"
register "sio_i2c0_voltage" = "0" # 3.3V