From: Francesco Dolcini <francesco@dolcini.it>
To: Frank Li <Frank.Li@nxp.com>
Cc: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
devicetree@vger.kernel.org, imx@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/4] ARM: dts: imx6qdl-sabrelite: add mdio phy address 0
Date: Tue, 12 May 2026 09:51:20 +0200 [thread overview]
Message-ID: <20260512075120.GB5820@francesco-nb> (raw)
In-Reply-To: <20260511-b4-imx25_dts_simple_warning-v1-1-01b855a5ce25@nxp.com>
On Mon, May 11, 2026 at 05:04:56PM -0400, Frank Li wrote:
> According to IEEE 802.3 Clause 22.2.4.5.5 PHYAD (PHY Address), A PHY that
> is connected to the station management entity via the mechanical interface
> defined in 22.6 shall always respond to transactions addressed to PHY
> Address zero <00000>.
>
> Use address 0 is safe because only one MDIO phy under mdio bus.
I do not think this is generally safe.
Not all ethernet phy answer to the 0 broadcast address. The one that I
have personally worked with consider 0 a unicast address.
Francesco
next prev parent reply other threads:[~2026-05-12 7:51 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-11 21:04 [PATCH 0/4] ARM: dts: DTB_CHECK warning cleanup Frank Li
2026-05-11 21:04 ` [PATCH 1/4] ARM: dts: imx6qdl-sabrelite: add mdio phy address 0 Frank Li
2026-05-11 22:15 ` Andrew Lunn
2026-05-12 7:52 ` Francesco Dolcini
2026-05-12 12:23 ` Fabio Estevam
2026-05-12 13:43 ` Fabio Estevam
2026-05-12 14:26 ` Frank Li
2026-05-12 7:51 ` Francesco Dolcini [this message]
2026-05-13 0:26 ` sashiko-bot
2026-05-11 21:04 ` [PATCH 2/4] ARM: dts: imx: add ti,deskew = <0> for ti,tfp410 Frank Li
2026-05-13 0:38 ` sashiko-bot
2026-05-11 21:04 ` [PATCH 3/4] ARM: dts: imx53-qsb: add dvdd and avdd supply for panel sii,43wvf1g Frank Li
2026-05-11 21:04 ` [PATCH 4/4] ARM: dts: imx53-ppd: add '#phy-cells' for usb-nop-xceiv Frank Li
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=20260512075120.GB5820@francesco-nb \
--to=francesco@dolcini.it \
--cc=Frank.Li@nxp.com \
--cc=conor+dt@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=festevam@gmail.com \
--cc=imx@lists.linux.dev \
--cc=kernel@pengutronix.de \
--cc=krzk+dt@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=robh@kernel.org \
--cc=s.hauer@pengutronix.de \
/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