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

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Message-ID:
 <AM9PR04MB8604AE7ABC833D77D403229795DA2@AM9PR04MB8604.eurprd04.prod.outlook.com>
Date: Mon, 8 Jul 2024 11:54:54 +0000
From: Pankaj Gupta <pankaj.gupta@....com>
To: Krzysztof Kozlowski <krzk@...nel.org>, Jonathan Corbet <corbet@....net>,
	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>, Pengutronix Kernel Team
	<kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, Rob Herring
	<robh+dt@...nel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC: "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"imx@...ts.linux.dev" <imx@...ts.linux.dev>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [EXT] Re: [PATCH v4 2/5] dt-bindings: arm: fsl: add imx-se-fw
 binding doc



> -----Original Message-----
> From: Krzysztof Kozlowski <krzk@...nel.org>
> Sent: Monday, July 8, 2024 4:54 PM
> To: Pankaj Gupta <pankaj.gupta@....com>; Jonathan Corbet
> <corbet@....net>; 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>;
> Pengutronix Kernel Team <kernel@...gutronix.de>; Fabio Estevam
> <festevam@...il.com>; Rob Herring <robh+dt@...nel.org>; Krzysztof
> Kozlowski <krzysztof.kozlowski+dt@...aro.org>
> Cc: linux-doc@...r.kernel.org; linux-kernel@...r.kernel.org;
> devicetree@...r.kernel.org; imx@...ts.linux.dev; linux-arm-
> kernel@...ts.infradead.org
> Subject: Re: [EXT] Re: [PATCH v4 2/5] dt-bindings: arm: fsl: add imx-se-fw
> binding doc
> 
> Caution: This is an external email. Please take care when clicking links or
> opening attachments. When in doubt, report the message using the 'Report
> this email' button
> 
> 
> 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