All of lore.kernel.org
 help / color / mirror / Atom feed
From: Andrew Lunn <andrew@lunn.ch>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	David Jander <david@protonic.nl>,
	"David S. Miller" <davem@davemloft.net>,
	Sascha Hauer <kernel@pengutronix.de>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	netdev <netdev@vger.kernel.org>,
	Philippe Schenker <philippe.schenker@toradex.com>,
	Russell King <linux@armlinux.org.uk>,
	Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>,
	Linux-Renesas <linux-renesas-soc@vger.kernel.org>
Subject: Re: [PATCH net-next v3] net: phy: micrel: add phy-mode support for the KSZ9031 PHY
Date: Tue, 28 Apr 2020 17:47:18 +0200	[thread overview]
Message-ID: <20200428154718.GA24923@lunn.ch> (raw)
In-Reply-To: <CAMuHMdU1ZmSm_tjtWxoFNako2fzmranGVz5qqD2YRNEFRjX0Sw@mail.gmail.com>

On Tue, Apr 28, 2020 at 05:28:30PM +0200, Geert Uytterhoeven wrote:
> This triggers on Renesas Salvator-X(S):
> 
>     Micrel KSZ9031 Gigabit PHY e6800000.ethernet-ffffffff:00:
> *-skew-ps values should be used only with phy-mode = "rgmii"
> 
> which uses:
> 
>         phy-mode = "rgmii-txid";
> 
> and:
> 
>         rxc-skew-ps = <1500>;
> 
> If I understand Documentation/devicetree/bindings/net/ethernet-controller.yaml
> correctly:

Hi Geert

Checking for skews which might contradict the PHY-mode is new. I think
this is the first PHY driver to do it. So i'm not too surprised it has
triggered a warning, or there is contradictory documentation.

Your use cases is reasonable. Have the normal transmit delay, and a
bit shorted receive delay. So we should allow it. It just makes the
validation code more complex :-(

	   Andrew

  reply	other threads:[~2020-04-28 15:47 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-22  7:21 [PATCH net-next v3] net: phy: micrel: add phy-mode support for the KSZ9031 PHY Oleksij Rempel
2020-04-22  8:48 ` Philippe Schenker
2020-04-22 13:39 ` Andrew Lunn
2020-04-23  2:39 ` David Miller
2020-04-28 15:28 ` Geert Uytterhoeven
2020-04-28 15:47   ` Andrew Lunn [this message]
2020-04-28 16:16     ` Philippe Schenker
2020-04-29  8:45       ` Geert Uytterhoeven
2020-04-29  9:26         ` Oleksij Rempel
2020-05-27 19:11           ` Geert Uytterhoeven
2020-05-27 20:52             ` Andrew Lunn
2020-05-28 13:10               ` Geert Uytterhoeven
2020-05-28 16:08                 ` Andrew Lunn
2020-05-29  4:59                   ` Oleksij Rempel
2020-05-29 10:17                   ` Geert Uytterhoeven
2020-05-28  8:20             ` Philippe Schenker
2020-05-28 12:51               ` Geert Uytterhoeven
2020-05-28 23:31                 ` Florian Fainelli
2020-04-29 10:02         ` Philippe Schenker
2020-05-05 18:26 ` Grygorii Strashko
2020-05-06  4:51   ` Oleksij Rempel
2020-07-10 22:36 ` Alexandre Belloni
2020-07-10 22:54   ` Andrew Lunn
2020-07-10 23:25     ` Alexandre Belloni
  -- strict thread matches above, loose matches on Subject: below --
2020-04-07  9:36 Oleksij Rempel
2020-04-07 10:57 ` Philippe Schenker
2020-04-07 11:02   ` Marc Kleine-Budde
2020-04-07 12:34     ` Philippe Schenker
2020-04-07 11:05   ` Russell King - ARM Linux admin
2020-04-07 20:13 ` David Miller

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=20200428154718.GA24923@lunn.ch \
    --to=andrew@lunn.ch \
    --cc=davem@davemloft.net \
    --cc=david@protonic.nl \
    --cc=f.fainelli@gmail.com \
    --cc=geert@linux-m68k.org \
    --cc=hkallweit1@gmail.com \
    --cc=kernel@pengutronix.de \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-renesas-soc@vger.kernel.org \
    --cc=linux@armlinux.org.uk \
    --cc=netdev@vger.kernel.org \
    --cc=o.rempel@pengutronix.de \
    --cc=philippe.schenker@toradex.com \
    --cc=sergei.shtylyov@cogentembedded.com \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.