RE: [EXT] Re: [PATCH v4 2/5] dt-bindings: arm: fsl: add imx-se-fw binding doc

[Pankaj Gupta <pankaj.gupta@nxp.com>]

> -----Original Message-----
> From: Krzysztof Kozlowski <krzk@kernel.org>
> Sent: Monday, July 8, 2024 4:54 PM
> To: Pankaj Gupta <pankaj.gupta@nxp.com>; Jonathan Corbet
> <corbet@lwn.net>; Rob Herring <robh@kernel.org>; Krzysztof Kozlowski
> <krzk+dt@kernel.org>; Conor Dooley <conor+dt@kernel.org>; Shawn Guo
> <shawnguo@kernel.org>; Sascha Hauer <s.hauer@pengutronix.de>;
> Pengutronix Kernel Team <kernel@pengutronix.de>; Fabio Estevam
> <festevam@gmail.com>; Rob Herring <robh+dt@kernel.org>; Krzysztof
> Kozlowski <krzysztof.kozlowski+dt@linaro.org>
> Cc: linux-doc@vger.kernel.org; linux-kernel@vger.kernel.org;
> devicetree@vger.kernel.org; imx@lists.linux.dev; linux-arm-
> kernel@lists.infradead.org
> Subject: Re: [EXT] Re: [PATCH v4 2/5] dt-bindings: arm: fsl: add imx-se-fw
> binding doc
> 
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> 
> On 08/07/2024 13:19, Pankaj Gupta wrote:
> >>>> 4 mailboxes? This cannot be different.
> >>> mbox-names can have any of the above mentioned 4 values.
> >>> And  two values are minimum, required.
> >>
> >> No, I said it cannot be different. If two are minimum, then you can
> >> have here 4, right? But earlier you said you can have only 2. It does not
> make any sense.
> >
> > Understood.  Will fix this with following changes.
> >
> > -      - const: tx
> > -      - const: rx
> > -      - const: txdb
> > -      - const: rxdb
> > -    minItems: 2
> > +      - enum:
> > +          - tx
> > +          - txdb
> > +      - enum:
> > +          - rx
> > +          - rxdb
> 
> OK, this is now clear and answer is also clear:
> No, you cannot have different names, except some rare cases.
> Please explain why this should be an exception?

The name suggests the type of protocol for:
- sending:    tx or txdb (with doorbell).
- receiving:  rx & rxdb  (with doorbell).

NXP IP SECO on i.MX8DXL/8QXP supports txdb & rxdb. Hence added these names.

It is just for readability to understand from platform's DTSI file.


> 
> Best regards,
> Krzysztof