linux-kernel - Re: [PATCH 1/2] devicetree: power: add bindings for GPIO-driven power switches

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Message-ID: <CAMpxmJWw3wCE4ch8TVik+2b3BC8Lvxbi13HGd9GxruSRLu95Mg@mail.gmail.com>
Date:   Wed, 14 Dec 2016 17:58:21 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Mark Rutland <mark.rutland@....com>, linux-iio@...r.kernel.org,
        linux-devicetree <devicetree@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Kevin Hilman <khilman@...libre.com>,
        Patrick Titiano <ptitiano@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        linux-gpio <linux-gpio@...r.kernel.org>,
        Sebastian Reichel <sre@...nel.org>,
        linux-pm <linux-pm@...r.kernel.org>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>
Subject: Re: [PATCH 1/2] devicetree: power: add bindings for GPIO-driven power switches

2016-12-13 20:27 GMT+01:00 Rob Herring <robh@...nel.org>:
> On Sun, Dec 11, 2016 at 11:21:44PM +0100, Bartosz Golaszewski wrote:
>> Some boards are equipped with simple, GPIO-driven power load switches.
>> An example of such ICs is the TI tps229* series.
>
> How is this different than a GPIO regulator? The input and output
> voltages just happen to be the same. I could be convinced this is
> different enough to have a different compatible, but it somewhat seems
> you want to use this for IIO, so you are creating a different binding
> for that usecase.
>

It's more of a fixed regulator I suppose. Do you mean adding a new
compatible to the fixed-regulator binding (e.g. "gpio-power-switch" or
"simple-power-switch") and then providing an iio driver for toggling
the switch?

Thanks,
Bartosz