usb: ehci-fsl: set INCR8 mode for system bus interface on MPC512x

Browse source

Use INCR8 mode for system bus interface of the USB controller
on MPC512x. This is a work-around for the AHB bus lock up
problem observed on MPC512x when there is heavy simultaneous
PATA write or network (FEC) activity.

See also "12.4 The USB controller can issue transactions that lock
up the AHB bus under certain conditions" in MPC5121e (M36P) Errata.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Tested-by: Matthias Fuchs <matthias.fuchs@esd.ue>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

...

This commit is contained in:

Anatolij Gustschin 2012-01-24 22:17:38 +01:00 • committed by Greg Kroah-Hartman

parent 820c629a59

commit 761bbcb74e

2 changed files with 16 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

14

drivers/usb/host/ehci-fsl.c

View file

2

drivers/usb/host/ehci-fsl.h

View file