Netdev List
 help / color / mirror / Atom feed
From: Guennadi Liakhovetski <g.liakhovetski-Mmb7MZpHnFY@public.gmane.org>
To: Jason Gunthorpe
	<jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
Cc: linux-sh-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org,
	Magnus Damm <magnus.damm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Simon Horman <horms-/R6kz+dDXgpPR4JQBCEnsQ@public.gmane.org>,
	Laurent Pinchart
	<laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [PATCH/RFC 2/3] ethernet: add a PHY reset GPIO DT binding to sh_eth
Date: Mon, 8 Jul 2013 12:49:47 +0200 (CEST)	[thread overview]
Message-ID: <Pine.LNX.4.64.1307081247530.19819@axis700.grange> (raw)
In-Reply-To: <20130125182137.GB7393-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>

Hi Jason

Sorry for resuming an old thread, but I'd like to get this solved 
eventually.

On Fri, 25 Jan 2013, Jason Gunthorpe wrote:

> On Fri, Jan 25, 2013 at 11:34:55AM +0100, Guennadi Liakhovetski wrote:
> 
> > > Is there no need to reset the phy at runtime ?
> > 
> > No idea, I'm not developing the driver, I'm just porting one specific 
> > feature from one API to another with no functional changes (apart from 
> > postponing setting the GPIO).
> 
> Generally Linux relies on resetting the phy via the inband MDIO method,
> which is what Linux does. It is pretty much never required to reset
> via the hard pin - but you do need to generate a robust reset edge on
> the reset pin once after power up.

This all sounds good. So, is there a preferred way to do that? Where in 
the ethernet framework would you propose to hook up such a reset edge 
generation?

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/

  parent reply	other threads:[~2013-07-08 10:49 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1359043653-11374-1-git-send-email-g.liakhovetski@gmx.de>
2013-01-24 16:07 ` [PATCH/RFC 2/3] ethernet: add a PHY reset GPIO DT binding to sh_eth Guennadi Liakhovetski
2013-01-25 10:21   ` Laurent Pinchart
2013-01-25 10:34     ` Guennadi Liakhovetski
2013-01-25 18:21       ` Jason Gunthorpe
     [not found]         ` <20130125182137.GB7393-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-07-08 10:49           ` Guennadi Liakhovetski [this message]
2013-01-26  1:04       ` Laurent Pinchart

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=Pine.LNX.4.64.1307081247530.19819@axis700.grange \
    --to=g.liakhovetski-mmb7mzphnfy@public.gmane.org \
    --cc=devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org \
    --cc=horms-/R6kz+dDXgpPR4JQBCEnsQ@public.gmane.org \
    --cc=jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org \
    --cc=laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org \
    --cc=linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org \
    --cc=linux-sh-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=magnus.damm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
    --cc=netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox