linux-kernel - Re: [PATCH v2 4/4] dt-bindings: mfd: update TI tps6105x chip bindings

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Date:   Tue, 19 Nov 2019 14:03:05 -0500
From:   Sven Van Asbroeck <thesven73@...il.com>
To:     Dan Murphy <dmurphy@...com>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Grigoryev Denis <grigoryev@...twel.ru>,
        Axel Lin <axel.lin@...ics.com>,
        Mark Rutland <mark.rutland@....com>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-leds@...r.kernel.org
Subject: Re: [PATCH v2 4/4] dt-bindings: mfd: update TI tps6105x chip bindings

On Tue, Nov 19, 2019 at 1:37 PM Dan Murphy <dmurphy@...com> wrote:
>
> > +
> > +Example (GPIO + led operation):
> What part of the example is GPIO? Is that the default function?

The gpio function is always available by default.
The mfd driver always adds the gpio mfd_cell.
But no-one has ever implemented a mfd sub-driver for gpio.

> > +
> > +i2c0 {
> > +     tps61052@33 {
> > +             compatible = "ti,tps61052";
> > +             reg = <0x33>;
> > +
> > +             led {
> > +                     label = "tps-torch";
>
> function and color examples?

No function, no colour. This is a simple led control with 8 intensity
steps. We use it as a led torch on an industrial device.