netdev - Re: [PATCH] dp83640: Support a configurable number of periodic outputs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1391527464.7871.15.camel@e37108.spectralink.com>
Date:	Tue, 4 Feb 2014 15:24:27 +0000
From:	Sørensen, Stefan 
	<Stefan.Sorensen@...ctralink.com>
To:	"ben@...adent.org.uk" <ben@...adent.org.uk>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"richardcochran@...il.com" <richardcochran@...il.com>
Subject: Re: [PATCH] dp83640: Support a configurable number of periodic
 outputs

On Tue, 2014-02-04 at 10:53 +0000, Ben Hutchings wrote:
> > Modules parameters are surely easiest (for the developer), but perhaps
> > the time has come for the "right way."
> > 
> > Currently there is no interface for configuring the GPIOs used by PHC
> > devices, and last year I was going to add the GPIOs to the igb
> > driver. The conclusion of the discussion was that module parameters
> > are bad for this, but ethtool is good.
> > 
> >   http://www.spinics.net/lists/netdev/msg237692.html
> > 
> > [ I did not follow through to come up with an ethtool way of configuring
> >   the igb pins. ]
> > 
> > Even though it is more work, I think the way forward is to invent a
> > way to let the user configure this kind of thing via ethtool. Would
> > you care to take a stab at this?
> 
> It seems to me that this is board configuration, not user configuration,
> so it should be defined in DT or ACPI or whatever.
> 
> Are there boards which expose multiple GPIOs for users to plug together
> PPS signals?

I would definitely prefer the DT approach. On all the platforms I have
used, the GPIO configuration has been set in stone by the HW. But there
might be some dev boards or the like that has them configurable.

Stefan