linux-kernel - Re: [PATCH v2 1/1] dt-bindings: net: convert enetc to yaml

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Message-ID: <CAL_JsqJt+6_YrUaapxd+u7GjQffFi=okirkq+cotTUE43Knwqw@mail.gmail.com>
Date: Tue, 9 Jul 2024 08:10:40 -0600
From: Rob Herring <robh@...nel.org>
To: Wei Fang <wei.fang@....com>
Cc: Frank Li <frank.li@....com>, "krzk@...nel.org" <krzk@...nel.org>, 
	"conor+dt@...nel.org" <conor+dt@...nel.org>, "davem@...emloft.net" <davem@...emloft.net>, 
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>, "edumazet@...gle.com" <edumazet@...gle.com>, 
	"imx@...ts.linux.dev" <imx@...ts.linux.dev>, "krzk+dt@...nel.org" <krzk+dt@...nel.org>, 
	"kuba@...nel.org" <kuba@...nel.org>, 
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, 
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>, "pabeni@...hat.com" <pabeni@...hat.com>, 
	Vladimir Oltean <vladimir.oltean@....com>, Claudiu Manoil <claudiu.manoil@....com>, 
	Clark Wang <xiaoning.wang@....com>
Subject: Re: [PATCH v2 1/1] dt-bindings: net: convert enetc to yaml

On Mon, Jul 8, 2024 at 4:07 AM Wei Fang <wei.fang@....com> wrote:
>
> > -----Original Message-----
> > From: Frank Li <Frank.Li@....com>
> > Sent: 2024年6月27日 0:23
> > To: krzk@...nel.org
> > Cc: Frank Li <frank.li@....com>; conor+dt@...nel.org;
> > davem@...emloft.net; devicetree@...r.kernel.org; edumazet@...gle.com;
> > imx@...ts.linux.dev; krzk+dt@...nel.org; kuba@...nel.org;
> > linux-kernel@...r.kernel.org; netdev@...r.kernel.org; pabeni@...hat.com;
> > robh@...nel.org
> > Subject: [PATCH v2 1/1] dt-bindings: net: convert enetc to yaml
> >
> > Convert enetc device binding file to yaml. Split to 3 yaml files, 'fsl,enetc.yaml',
> > 'fsl,enetc-mdio.yaml', 'fsl,enetc-ierb.yaml'.
> >
>
> Sorry I didn't see this patch until now, I was planning to make this conversion
> but didn't realize you had started it first. It's very nice, thanks!
>
> > Additional Changes:
> > - Add pci<vendor id>,<production id> in compatible string.
> > - Ref to common ethernet-controller.yaml and mdio.yaml.
> > - Remove fixed-link part.
> >
> > Signed-off-by: Frank Li <Frank.Li@....com>
> > ---
> > Change from v1 to v2
> > - renamee file as fsl,enetc-mdio.yaml, fsl,enetc-ierb.yaml, fsl,enetc.yaml
> > - example include pcie node
> > ---
> >  .../bindings/net/fsl,enetc-ierb.yaml          |  35 ++++++
> >  .../bindings/net/fsl,enetc-mdio.yaml          |  53 ++++++++
> >  .../devicetree/bindings/net/fsl,enetc.yaml    |  50 ++++++++
> >  .../devicetree/bindings/net/fsl-enetc.txt     | 119 ------------------
> >  4 files changed, 138 insertions(+), 119 deletions(-)  create mode 100644
> > Documentation/devicetree/bindings/net/fsl,enetc-ierb.yaml
> >  create mode 100644
> > Documentation/devicetree/bindings/net/fsl,enetc-mdio.yaml
> >  create mode 100644 Documentation/devicetree/bindings/net/fsl,enetc.yaml
> >  delete mode 100644 Documentation/devicetree/bindings/net/fsl-enetc.txt
> >
> > diff --git a/Documentation/devicetree/bindings/net/fsl,enetc-mdio.yaml
> > b/Documentation/devicetree/bindings/net/fsl,enetc-mdio.yaml
> > new file mode 100644
> > index 0000000000000..60740ea56cb08
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/net/fsl,enetc-mdio.yaml
>
> I suggest changing the file name to nxp,netc-emdio.yaml. "fsl" is a very outdated
> prefix. For new files, I think "nxp" is a better prefix.

Convention is filenames use the compatible string. So no.

> > @@ -0,0 +1,53 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2
> > +---
> > +
> > +title: ENETC the central MDIO PCIe endpoint device
> external is better, that is why we call it EMDIO.
>
> > +
> > +description:
> > +  In this case, the mdio node should be defined as another PCIe
> > +  endpoint node, at the same level with the ENETC port nodes
> > +
> This my local description, excerpted from NETC's block guide, FYI.
> description: |
>   NETC provides an external master MDIO interface (EMDIO) for managing external
>   devices (PHYs). EMDIO supports both Clause 22 and 45 protocols. And the EMDIO
>   provides a means for different software modules to share a single set of MDIO
>   signals to access their PHYs.
>
> > +maintainers:
> > +  - Frank Li <Frank.Li@....com>.
> Vladimir and Claudiu as the driver maintainer, it is best to add them
> to this list
>
> > +
> > +properties:
> > +  compatible:
> > +    items:
> > +      - enum:
> > +          - pci1957,ee01
> > +      - const: fsl,enetc-mdio
>
> " fsl,enetc-mdio" is meaningless, we did not use it ever.

arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi:
 compatible = "pci1957,ee01", "fsl,enetc-mdio";

In fact, until I recently added the standard PCI compatibles, these
were the only compatible strings used.


Rob