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References: <20221130155519.20362-1-andriy.shevchenko@linux.intel.com> <20221130155519.20362-2-andriy.shevchenko@linux.intel.com>
In-Reply-To: <20221130155519.20362-2-andriy.shevchenko@linux.intel.com>
From:   Linus Walleij <linus.walleij@linaro.org>
Date:   Sat, 3 Dec 2022 10:38:45 +0100
Message-ID: <CACRpkdaQWZE6=BNEh5hSH9=jBK=TcLoD1uUb=JyNYmHFvaSAfg@mail.gmail.com>
Subject: Re: [PATCH v1 2/3] Documentation: gpio: Add a section on what to
 return in ->get() callback
To:     Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Kent Gibson <warthog618@gmail.com>
Cc:     Marc Zyngier <maz@kernel.org>, linux-gpio@vger.kernel.org,
        linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
        Bartosz Golaszewski <brgl@bgdev.pl>,
        Jonathan Corbet <corbet@lwn.net>,
        Hans de Goede <hdegoede@redhat.com>
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On Wed, Nov 30, 2022 at 4:55 PM Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:

> +The below table gathered the most used cases.
> +
> +==========  ==========  ===============  =======================
> +  Input       Output         State        What value to return?
> +==========  ==========  ===============  =======================
> + Disabled    Disabled    Hi-Z             input buffer
> + Disabled    OS/OD/etc   Single ended     [cached] output buffer
> +    x        Push-Pull   Out              [cached] output buffer
> + Enabled     Disabled    In               input buffer
> + Enabled     OS/OD/etc   Bidirectional    input buffer
> +==========  ==========  ===============  =======================

This looks about right to me, but we need more input, Kent?

Yours,
Linus Walleij