linux-kernel - RE: [PATCH 03/19] dt-bindings: serial: renesas,rsci: Document RZ/G3E support

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Message-ID:
 <TY3PR01MB11346239D8EB6EF5D120ABA0086FDA@TY3PR01MB11346.jpnprd01.prod.outlook.com>
Date: Tue, 28 Oct 2025 20:26:08 +0000
From: Biju Das <biju.das.jz@...renesas.com>
To: Conor Dooley <conor@...nel.org>
CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Jiri Slaby
	<jirislaby@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
	<krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Geert Uytterhoeven
	<geert+renesas@...der.be>, magnus.damm <magnus.damm@...il.com>, Prabhakar
 Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-renesas-soc@...r.kernel.org" <linux-renesas-soc@...r.kernel.org>,
	biju.das.au <biju.das.au@...il.com>
Subject: RE: [PATCH 03/19] dt-bindings: serial: renesas,rsci: Document RZ/G3E
 support

Hi Conor Dooley,

Thanks for the feedback.

> -----Original Message-----
> From: Conor Dooley <conor@...nel.org>
> Sent: 28 October 2025 19:52
> Subject: Re: [PATCH 03/19] dt-bindings: serial: renesas,rsci: Document RZ/G3E support
> 
> On Tue, Oct 28, 2025 at 07:41:33PM +0000, Biju Das wrote:
> > > > +  - if:
> > > > +      properties:
> > > > +        compatible:
> > > > +          contains:
> > > > +            enum:
> > > > +              - renesas,r9a09g047-rsci
> > > > +              - renesas,r9a09g047-rscif
> > > > +    then:
> > > > +      properties:
> > > > +        clocks:
> > > > +          minItems: 5
> > > > +
> > > > +        clock-names:
> > > > +          minItems: 5
> > > > +
> > > > +      required:
> > > > +        - resets
> > > > +        - reset-names
> > >
> > > Does this need an "else: properties: resets: false"? Or do other devices actually have resets too?
> >
> > It is not required as resets are optional for RZ/T2H and RZ/N2H.
> > RZ/T2H and N2H does not have Resets.
> 
> This is a contradiction. Either they are optional for these platforms or the platforms do not have
> resets. Cannot be both!

Some RSCI IP SoCs has resets and some does not have. From RSCI IP point of view
this property is optional.

I just try to avoid complex if else statements in dt schema by adding
Per SoC properties.

If you prefer else statements for resets, I can add that as well. Please let me know.

Cheers,
Biju