linux-kernel - Re: [PATCH 2/5] dt-bindings: net: Add MTIP L2 switch description (fec,mtip-switch.yaml)

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Message-ID: <20250325131507.692804cd@wsk>
Date: Tue, 25 Mar 2025 13:15:07 +0100
From: Lukasz Majewski <lukma@...x.de>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, Sascha
 Hauer <s.hauer@...gutronix.de>, Paolo Abeni <pabeni@...hat.com>, Jakub
 Kicinski <kuba@...nel.org>, Eric Dumazet <edumazet@...gle.com>,
 davem@...emloft.net, Andrew Lunn <andrew+netdev@...n.ch>, Pengutronix
 Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>,
 devicetree@...r.kernel.org, imx@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, Richard
 Cochran <richardcochran@...il.com>, netdev@...r.kernel.org, Maxime
 Chevallier <maxime.chevallier@...tlin.com>
Subject: Re: [PATCH 2/5] dt-bindings: net: Add MTIP L2 switch description
 (fec,mtip-switch.yaml)

Hi Krzysztof,

> On 25/03/2025 12:57, Lukasz Majewski wrote:
> > This patch provides description of the MTIP L2 switch available in
> > some NXP's SOCs - imx287, vf610.
> > 
> > Signed-off-by: Lukasz Majewski <lukma@...x.de>
> > ---
> >  .../bindings/net/fec,mtip-switch.yaml         | 160
> > ++++++++++++++++++  
> 
> Use compatible as filename.

I've followed the fsl,fec.yaml as an example. This file has description
for all the device tree sources from fec_main.c

I've considered adding the full name - e.g. fec,imx287-mtip-switch.yaml
but this driver could (and probably will) be extended to vf610.

So what is the advised way to go?

> 
> >  1 file changed, 160 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/net/fec,mtip-switch.yaml
> > 
> > diff --git
> > a/Documentation/devicetree/bindings/net/fec,mtip-switch.yaml
> > b/Documentation/devicetree/bindings/net/fec,mtip-switch.yaml new
> > file mode 100644 index 000000000000..cd85385e0f79 --- /dev/null
> > +++ b/Documentation/devicetree/bindings/net/fec,mtip-switch.yaml
> > @@ -0,0 +1,160 @@
> > +# SPDX-License-Identifier: GPL-2.0-only
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/net/fsl,mtip-switch.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Freescale MTIP Level 2 (L2) switch
> > +
> > +maintainers:
> > +  - Lukasz Majewski <lukma@...x.de>
> > +  
> 
> description?

Ok.

> 
> > +allOf:
> > +  - $ref: ethernet-controller.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    oneOf:  
> 
> Drop, you have only one variant.

Ok, for imx287 this can be dropped, and then extended with vf610.

> 
> > +      - enum:
> > +	  - imx287-mtip-switch  
> 
> This wasn't tested. Except whitespace errors, above compatible does
> not have format of compatible. Please look at other NXP bindings.
> 
> Missing blank line.
> 
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 3  
> 
> Need to list items instead.
> 
> > +
> > +  clocks:
> > +    maxItems: 4
> > +    description:
> > +      The "ipg", for MAC ipg_clk_s, ipg_clk_mac_s that are for
> > register accessing.
> > +      The "ahb", for MAC ipg_clk, ipg_clk_mac that are bus clock.
> > +      The "ptp"(option), for IEEE1588 timer clock that requires
> > the clock.
> > +      The "enet_out"(option), output clock for external device,
> > like supply clock
> > +      for PHY. The clock is required if PHY clock source from SOC.
> >  
> 
> Same problems. This binding does not look at all as any other
> binding. I finish review here, but the code has similar trivial
> issues all the way, including incorrect indentation. Start from well
> reviewed existing binding or example-schema.

As I've stated above - this code is reduced copy of fsl,fec.yaml...

> 
> Best regards,
> Krzysztof

Best regards,

Lukasz Majewski

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