linux-kernel - Re: [PATCH V3 2/2] pinctrl: tegra: Add driver to configure voltage and power of io pads

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Message-ID: <CACRpkdbp8_eR7PLoaX4AJbhcx_tYQjcS5U_hR3EU7b4dar3ckg@mail.gmail.com>
Date:   Thu, 24 Nov 2016 15:11:04 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Laxman Dewangan <ldewangan@...dia.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Stephen Warren <swarren@...dotorg.org>,
        "thierry.reding@...il.com" <thierry.reding@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexandre Courbot <gnurou@...il.com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Joe Perches <joe@...ches.com>,
        Jon Hunter <jonathanh@...dia.com>
Subject: Re: [PATCH V3 2/2] pinctrl: tegra: Add driver to configure voltage
 and power of io pads

On Wed, Nov 23, 2016 at 12:42 PM, Laxman Dewangan <ldewangan@...dia.com> wrote:

> Here, we need the regulator handle which can support the other regulator
> APIs.
>
> In some of platforms, we do not use some of the io-pins and on this case, we
> do not connect the IO rail supply for these pins. So this is like a hardware
> optional.
>
> If the IO pins are used then it need to have the proper regulator handle.
> Missing regulator handle on DT will be like that IO pads are not used.

OK I buy that argument, unless Mark (Brown) has comments.

Yours,
Linus Walleij