[OE-core] [PATCH 1/2] udev: update init script for conditional probing of platform bus
Denys Dmytriyenko
denis at denix.org
Wed Jun 25 00:52:55 UTC 2014
Ping? Any comments? Any better suggestions?
On Fri, Jun 20, 2014 at 01:13:38PM -0400, Denys Dmytriyenko wrote:
> On Thu, Jun 19, 2014 at 06:53:22PM -0400, Denys Dmytriyenko wrote:
> > From: Denys Dmytriyenko <denys at ti.com>
> >
> > Make probing of "platform" bus conditional based on PROBE_PLATFORM_BUS
> > variable from /etc/default/udev-cache on subsequent boots when udev
> > cache is used. PROBE_PLATFORM_BUS has to be set to "yes" in order to
> > force probing on every boot, otherwise it uses the old default behaviour
> > of probing it just the first time.
> >
> > This is helpful on modern SoCs where most of the low level peripheral
> > drivers are registered on the platform bus and need to be probed to load
> > the necessary modules and enable the connected buses and subsystems.
>
> Any questions, comments? I would like to keep a dialog open on this one.
> Thanks.
>
>
> > Signed-off-by: Denys Dmytriyenko <denys at ti.com>
> > ---
> > meta/recipes-core/udev/udev/init | 7 ++++++-
> > 1 file changed, 6 insertions(+), 1 deletion(-)
> >
> > diff --git a/meta/recipes-core/udev/udev/init b/meta/recipes-core/udev/udev/init
> > index 410a650..f2c84d5 100644
> > --- a/meta/recipes-core/udev/udev/init
> > +++ b/meta/recipes-core/udev/udev/init
> > @@ -102,7 +102,12 @@ case "$1" in
> >
> > udevadm control --env=STARTUP=1
> > if [ "$not_first_boot" != "" ];then
> > - udevadm trigger --action=add --subsystem-nomatch=tty --subsystem-nomatch=mem --subsystem-nomatch=vc --subsystem-nomatch=vtconsole --subsystem-nomatch=misc --subsystem-nomatch=dcon --subsystem-nomatch=pci_bus --subsystem-nomatch=graphics --subsystem-nomatch=backlight --subsystem-nomatch=video4linux --subsystem-nomatch=platform
> > + if [ "$PROBE_PLATFORM_BUS" != "yes" ]; then
> > + PLATFORM_BUS_NOMATCH="--subsystem-nomatch=platform"
> > + else
> > + PLATFORM_BUS_NOMATCH=""
> > + fi
> > + udevadm trigger --action=add --subsystem-nomatch=tty --subsystem-nomatch=mem --subsystem-nomatch=vc --subsystem-nomatch=vtconsole --subsystem-nomatch=misc --subsystem-nomatch=dcon --subsystem-nomatch=pci_bus --subsystem-nomatch=graphics --subsystem-nomatch=backlight --subsystem-nomatch=video4linux $PLATFORM_BUS_NOMATCH
> > (udevadm settle --timeout=3; udevadm control --env=STARTUP=)&
> > else
> > udevadm trigger --action=add
> > --
> > 2.0.0
> >
> > --
> > _______________________________________________
> > Openembedded-core mailing list
> > Openembedded-core at lists.openembedded.org
> > http://lists.openembedded.org/mailman/listinfo/openembedded-core
> --
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core at lists.openembedded.org
> http://lists.openembedded.org/mailman/listinfo/openembedded-core
More information about the Openembedded-core
mailing list