linux-kernel - Re: [PATCH 1/2] dt-bindings: pinctrl: add schema for NXP S32 SoCs

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Date:   Thu, 10 Nov 2022 11:18:00 +0000
From:   Andrei Stefanescu <andrei.stefanescu@....com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Chester Lin <clin@...e.com>
CC:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        dl-S32 <S32@....com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Larisa Ileana Grigore <larisa.grigore@....com>,
        Ghennadi Procopciuc <ghennadi.procopciuc@....com>,
        Andreas Färber <afaerber@...e.de>,
        Matthias Brugger <mbrugger@...e.com>
Subject: Re: [PATCH 1/2] dt-bindings: pinctrl: add schema for NXP S32 SoCs

Hi Chester and Linus,

> > > If you have the compatible, surely you know these indexes from that 
> > > compatible string?
> >
> > The nxp,pins property is more like a common language that both kernel 
> > and u-boot can share with. Of course hardcoding indexes can be 
> > achieved as well but that also means the index matrices in both kernel 
> > driver and u-boot driver must be revised and synchronized if new 
> > boards may have different reg and nxp,pins.
> 
> Is it new *BOARDS* that need a new table really or new *SOC:s*?
> 
> I was under the impression that this is per-soc and then it can be derived from the compatible string and should be in the driver.

Yes, the "nxp,pins" property only depends on the SoC. It will not change from board to board(boards using the same SoC). It can be derived from the compatible string.

Best regards,
Andrei