netdev - Re: Porting ethernet over spi driver (powerline device)

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Message-ID: <1398519921.7767.220.camel@deadeye.wl.decadent.org.uk>
Date:	Sat, 26 Apr 2014 14:45:21 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Stefan Wahren <stefan.wahren@...e.com>
Cc:	Stefan Wahren <info@...egoodbye.de>, netdev@...r.kernel.org,
	"Fabio.Estevam@...escale.com" <Fabio.Estevam@...escale.com>
Subject: Re: Porting ethernet over spi driver (powerline device)

On Fri, 2014-04-25 at 09:24 +0200, Stefan Wahren wrote:
> Am 22.04.2014 17:21, schrieb Ben Hutchings:
> > On Tue, 2014-04-22 at 12:02 +0200, Stefan Wahren wrote:
> >> Am 22.04.2014 04:22, schrieb Ben Hutchings:
> > [..]
> >>> Most of the interesting new features are related to multiqueue and
> >>> protocol offloads that I wouldn't expect to exist in an SPI-attached
> >>> Ethernet controller.  
> >> You are right.
> >>
> >> Btw, is simple power management (suspend, resume) a must-have feature?
> > If you're intending to get the driver in-tree, I don't think those are
> > an absolute requirement but I would certainly recommend implementing
> > them.
> >
> > Ben.
> >
> 
> Yes, that's my intension. The QCA7000 isn't a typical ethernet over spi
> device, it's a serial-to-powerline bridge. Acting like a ethernet over
> spi device simplifies the implementation. This leads to an important
> question.
> 
> Should the QCA7000 be handled strict as an ethernet device or a little
> bit more distinguished as a powerline device?
[...]

If it uses Ethernet framing, supports multicast/broadcast, etc. then I
don't think there's any need to distinguish it.

Ben.

-- 
Ben Hutchings
The most exhausting thing in life is being insincere. - Anne Morrow Lindberg

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