diff options
| author | Wisley Chen <wisley.chen@quantatw.com> | 2017-03-06 07:00:57 -0500 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2017-03-08 04:37:30 +0100 |
| commit | e4c85c128a5056e3f1ca7692edec97b33437da13 (patch) | |
| tree | 7af2861f19febc75f99353a54eaf1f2a754efa31 /src | |
| parent | 8c247a2a796f158664d3f1bba130c48bf4e1497c (diff) | |
| download | coreboot-e4c85c128a5056e3f1ca7692edec97b33437da13.tar.xz | |
mainboard/google/snappy: Override USB2 phy setting
Fine tune USB2, need to override the following registers.
port#1:
PERPORTPETXISET=7
PERPORTTXISET=0
BUG=b:35858164
BRANCH=reef
TEST=built, measured eye diagram on snappy, and reviewed by intel
Change-Id: I461cf8f032b4e70abc9707e6cd3603a62cee448f
Signed-off-by: Wisley Chen <wisley.chen@quantatw.com>
Reviewed-on: https://review.coreboot.org/18590
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/mainboard/google/reef/variants/snappy/devicetree.cb | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mainboard/google/reef/variants/snappy/devicetree.cb b/src/mainboard/google/reef/variants/snappy/devicetree.cb index 6d1c9ef145..2b47c5727d 100644 --- a/src/mainboard/google/reef/variants/snappy/devicetree.cb +++ b/src/mainboard/google/reef/variants/snappy/devicetree.cb @@ -112,6 +112,12 @@ chip soc/intel/apollolake # Minimum SLP S3 assertion width 28ms. register "slp_s3_assertion_width_usecs" = "28000" + # Override USB2 PER PORT register (PORT 1) + register "usb2eye[1]" = "{ + .Usb20PerPortPeTxiSet = 7, + .Usb20PerPortTxiSet = 0, + }" + device domain 0 on device pci 00.0 on end # - Host Bridge device pci 00.1 on end # - DPTF |