Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
References: <20221130155519.20362-1-andriy.shevchenko@linux.intel.com>
In-Reply-To: <20221130155519.20362-1-andriy.shevchenko@linux.intel.com>
From:   Linus Walleij <linus.walleij@linaro.org>
Date:   Sat, 3 Dec 2022 10:33:50 +0100
Message-ID: <CACRpkdYVU2KJMw=FRxCLXbpWY+42RGheHvnqzg2bo2=JjTRCOw@mail.gmail.com>
Subject: Re: [PATCH v1 1/3] Documentation: gpio: Input mode is not true Hi-Z
To:     Andy Shevchenko <andriy.shevchenko@linux.intel.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>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Wed, Nov 30, 2022 at 4:55 PM Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:

> The true Hi-Z (a.k.a. high impedance) mode is when pin is completely
> disconnected from the chip. This includes input buffer as well.
> Nevertheless, some hardware may not support that mode and they are
> considering input only as Hi-Z, but more precisely it is an equivalent
> to that, in electronics it's basically "an antenna mode".
>
> Sligthly correct documentation to take the above into consideration.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij