tree 9f44adc793c92660eca748d8d7db35ab7b83e418
parent 67d97a27053347dc9c999ab89c7b4178a537b67b
author Tao Xia <xiatao5@huaqin.corp-partner.google.com> 1627378752 +0800
committer Patrick Georgi <pgeorgi@google.com> 1627549856 +0000

mb/google/dedede/var/storo: Set the xHCI LFPS period sampling off time to 0ms

LTE module L850-GL may encounter U3 wakeup race condition with the host.
Setting xHCI LFPS periodic sampling off time to 0ms so that the host would not
miss the device-initiated U3 wakeup thus avoid the race condition.

BUG=b:193898133
BRANCH=dedede
TEST=flash the image to the device. Run following command to check the bits[7:4] is 0x0:
iotools mmio_read32 "XHCI MMIO BAR + 0x80A4"

Signed-off-by: Tao Xia <xiatao5@huaqin.corp-partner.google.com>
Change-Id: Ic84dc83b749cf3c6029a06730096b64ef8cb8cd9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56626
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>