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google/panther: Force enable ASPM on PCIe Root Port 4

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BUG=chrome-os-partner:21535
BUG=chrome-os-partner:25990
BRANCH=panther
TEST=manual: Boot on Panther and look in /sys/firmware/log for
the string "PCIe Root Port 4 ASPM is enabled"

Change-Id: I294571c113a8909adb2e97afca92aef9a1af917c
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: https://chromium-review.googlesource.com/187153
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Tested-by: Stefan Reinauer <reinauer@chromium.org>
Commit-Queue: Stefan Reinauer <reinauer@chromium.org>
This commit is contained in:
Stefan Reinauer 2014-02-19 15:05:15 -08:00 • committed by chrome-internal-fetch
commit cee89d7c83
1 changed files with 3 additions and 0 deletions
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3
src/mainboard/google/panther/devicetree.cb
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@ -61,6 +61,9 @@ chip northbridge/intel/haswell
register "sio_i2c0_voltage" = "0" # 3.3V
register "sio_i2c1_voltage" = "0" # 3.3V
# Force enable ASPM for PCIe Port 4
register "pcie_port_force_aspm" = "0x10"
# Enable port coalescing
register "pcie_port_coalesce" = "1"