linux-kernel - Re: [PATCH v7 2/2] gpio: gpio-cascade: add generic GPIO cascade

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Date:   Mon, 25 Oct 2021 00:17:44 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Mauri Sandberg <maukka@....kapsi.fi>
Cc:     Mauri Sandberg <sandberg@...lfence.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Drew Fustini <drew@...gleboard.org>
Subject: Re: [PATCH v7 2/2] gpio: gpio-cascade: add generic GPIO cascade

On Tue, Oct 19, 2021 at 10:10 PM Mauri Sandberg <maukka@....kapsi.fi> wrote:

> Adds support for building cascades of GPIO lines. That is, it allows
> setups when there is one upstream line and multiple cascaded lines, out
> of which one can be chosen at a time. The status of the upstream line
> can be conveyed to the selected cascaded line or, vice versa, the status
> of the cascaded line can be conveyed to the upstream line.
>
> A multiplexer is being used to select, which cascaded GPIO line is being
> used at any given time.
>
> At the moment only input direction is supported. In future it should be
> possible to add support for output direction, too.
>
> Signed-off-by: Mauri Sandberg <maukka@....kapsi.fi>
> ---
> v6 -> v7:

This v7 looks like clean and nice merge material to me,
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij