Re: [PATCH] soundwire: bus: add enumerated slave to device list

From: Vinod Koul
Date: Fri Sep 11 2020 - 01:38:24 EST

On 10-09-20, 09:02, Pierre-Louis Bossart wrote:
> > > > May be we could make the enumerated devices discovery bit more verbose!
> > >
> > > Maybe adding a device number sysfs entry would help, e.g. reporting
> > > NotAttched or a value in [0,11] would tell you if the device is actually
> > > present.
> >
> > Agreed, I cooked this patch to report verbose device status, let me know
> > if you are okay with this. I think this would be useful regardless of
> > current discussion.
> >
> > On Db845c I see:
> >
> > root@linaro-alip:/sys/bus/soundwire/devices# cat sdw:0:217:2010:0:1/status
> > Attached
> > root@linaro-alip:/sys/bus/soundwire/devices# cat sdw:0:217:2010:0:2/status
> > Attached
> looks like we are all aligned on the idea, I have a similar patch to at
> The difference is that the sysfs status and device_number is added even
> without a driver probe and when there's no firmware description. sysfs is
> currently only added after the driver probe, which wouldn't work for the
> case Srinivas was trying to deal with.

Okay sound fine

> but the way you dealt the status below is better than the switch case I
> used, so will merge this into my code.

Why merge? That patch can remain independent and you can add
device_number patch on top and another one for moving sysfs creation
without a driver probe, these three sound like three different patches
to me.

> Srinivas' patch needs a fix for ACPI platforms, won't probe otherwise since
> we don't have an of_node. If that's alright with everyone I can submit a
> patchset that gathers the 3 contributions.

Yes one series should be good, but lets keep one change in a patch