linux-kernel - Re: [PATCH v4 1/3] dt-bindings: pinctrl: Add bindings for pinctrl-mchp-sgpio driver

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Message-ID: <CACRpkda0RAK2gp-ZB6LDxAnQP3=VGrsfqkfV0=3FiSFfNhOmjA@mail.gmail.com>
Date:   Wed, 7 Oct 2020 15:35:26 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Lars Povlsen <lars.povlsen@...rochip.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Subject: Re: [PATCH v4 1/3] dt-bindings: pinctrl: Add bindings for
 pinctrl-mchp-sgpio driver

Hi Lars,

a new version of the patch set arrives while I'm reviewing, haha :D

On Wed, Oct 7, 2020 at 1:12 PM Lars Povlsen <lars.povlsen@...rochip.com> wrote:

> This adds DT bindings for the Microsemi/Microchip SGPIO controller,
> bindings microchip,sparx5-sgpio, mscc,ocelot-sgpio and
> mscc,luton-sgpio.
>
> Signed-off-by: Lars Povlsen <lars.povlsen@...rochip.com>

(...)
> +      reg:
> +        description: |
> +          The GPIO bank number. "0" is designates the input pin bank,
> +          "1" the output bank.
> +        maxItems: 1

Excellent.

> +      '#gpio-cells':
> +        const: 3

So I thought you needed three cells exactly because the
middle cell would get you the bank. That you now have in
reg. So what about using the standard twocell?

Yours,
Linus Walleij