Netdev Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Andrew Lunn <andrew@lunn.ch>
To: "Pali Rohár" <pali@kernel.org>
Cc: Igal Liberman <Igal.Liberman@freescale.com>,
	Shruti Kanetkar <Shruti@freescale.com>,
	Emil Medve <Emilian.Medve@freescale.com>,
	Scott Wood <oss@buserror.net>, Rob Herring <robh+dt@kernel.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Madalin Bucur <madalin.bucur@nxp.com>,
	Russell King <rmk+kernel@armlinux.org.uk>,
	netdev@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: Unsupported phy-connection-type sgmii-2500 in arch/powerpc/boot/dts/fsl/t1023rdb.dts
Date: Thu, 3 Jun 2021 17:12:31 +0200	[thread overview]
Message-ID: <YLjxX/XPDoRRIvYf@lunn.ch> (raw)
In-Reply-To: <20210603143453.if7hgifupx5k433b@pali>

On Thu, Jun 03, 2021 at 04:34:53PM +0200, Pali Rohár wrote:
> Hello!
> 
> In commit 84e0f1c13806 ("powerpc/mpc85xx: Add MDIO bus muxing support to
> the board device tree(s)") was added following DT property into DT node:
> arch/powerpc/boot/dts/fsl/t1023rdb.dts fm1mac3: ethernet@e4000
> 
>     phy-connection-type = "sgmii-2500";
> 
> But currently kernel does not recognize this "sgmii-2500" phy mode. See
> file include/linux/phy.h. In my opinion it should be "2500base-x" as
> this is mode which operates at 2.5 Gbps.
> 
> I do not think that sgmii-2500 mode exist at all (correct me if I'm
> wrong).

Kind of exist, unofficially. Some vendors run SGMII over clocked at
2500. But there is no standard for it, and it is unclear how inband
signalling should work. Whenever i see code saying 2.5G SGMII, i
always ask, are you sure, is it really 2500BaseX? Mostly it gets
changed to 2500BaseX after review.

PHY mode sgmii-2500 does not exist in mainline.

	Andrew


  reply	other threads:[~2021-06-03 15:12 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-03 14:34 Pali Rohár
2021-06-03 15:12 ` Andrew Lunn [this message]
2021-06-03 19:48   ` Pali Rohár
2021-06-04  7:35     ` Madalin Bucur
2021-06-04 17:32       ` Pali Rohár
2021-06-04 19:13         ` Madalin Bucur
2021-06-04 19:27       ` Russell King (Oracle)
2021-06-04 19:39         ` Madalin Bucur
2021-06-04 20:00           ` Russell King (Oracle)
2021-06-04 21:37             ` Madalin Bucur
2021-06-04 20:23           ` Andrew Lunn
2021-06-04 21:47             ` Madalin Bucur
2021-06-04 23:34               ` Pali Rohár
2021-06-05  0:33                 ` Russell King (Oracle)
2021-06-05 12:26                   ` Vladimir Oltean
2021-06-05 12:50                     ` What is inside GPON SFP module? (Was: Re: Unsupported phy-connection-type sgmii-2500 in arch/powerpc/boot/dts/fsl/t1023rdb.dts) Pali Rohár
2021-06-05 13:04                       ` Hauke Mehrtens
2021-06-05 13:31                         ` What is inside GPON SFP module? Pali Rohár
2021-06-05 14:17                           ` Hauke Mehrtens
2021-06-05 14:41                         ` What is inside GPON SFP module? (Was: Re: Unsupported phy-connection-type sgmii-2500 in arch/powerpc/boot/dts/fsl/t1023rdb.dts) Russell King (Oracle)
2021-06-08 10:33                           ` What is inside GPON SFP module? Pali Rohár
2021-06-19 20:35                 ` Unsupported phy-connection-type sgmii-2500 in arch/powerpc/boot/dts/fsl/t1023rdb.dts Pali Rohár
2021-07-04 13:43                 ` [PATCH] powerpc/fsl/dts: Fix phy-connection-type for fm1mac3 Pali Rohár
2021-07-14 17:11                   ` Scott Wood
2021-08-27 11:38                     ` Pali Rohár
2021-09-28 21:39                       ` Pali Rohár
2021-09-29 14:25                         ` Andrew Lunn
2021-10-02  9:06                           ` Pali Rohár
2021-06-04 23:18         ` Unsupported phy-connection-type sgmii-2500 in arch/powerpc/boot/dts/fsl/t1023rdb.dts Pali Rohár

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=YLjxX/XPDoRRIvYf@lunn.ch \
    --to=andrew@lunn.ch \
    --cc=Emilian.Medve@freescale.com \
    --cc=Igal.Liberman@freescale.com \
    --cc=Shruti@freescale.com \
    --cc=benh@kernel.crashing.org \
    --cc=devicetree@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=madalin.bucur@nxp.com \
    --cc=mpe@ellerman.id.au \
    --cc=netdev@vger.kernel.org \
    --cc=oss@buserror.net \
    --cc=pali@kernel.org \
    --cc=rmk+kernel@armlinux.org.uk \
    --cc=robh+dt@kernel.org \
    --subject='Re: Unsupported phy-connection-type sgmii-2500 in arch/powerpc/boot/dts/fsl/t1023rdb.dts' \
    /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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).