Subject: [PATCH v3] ARM: dts: tpc: Device tree description of the iMX6Q TPC board

From: [email-masked] (Lukasz Majewski)
Date: Thu, 5 Apr 2018 16:42:32 +0200

Hi Fabio,

> Hi Lukasz,
> 
> On Thu, Apr 5, 2018 at 4:09 AM, Lukasz Majewski <[email-masked]> wrote:
> 
> > +       reg_audio: regulator-audio {
> > +               compatible = "regulator-fixed";
> > +               regulator-name = "sgtl5000-supply";
> > +               gpio = <&gpio6 31 GPIO_ACTIVE_HIGH>;
> > +               enable-active-high;
> > +               regulator-always-on;
> > +       };  
> 
> sgtl5000 has 3 supplies: VDDD, VDDIO, VDDA.
> 
> Which supply does this reg_audio supply to the chip?

It supplies none of the above. This regulator is needed to enable
amplifier output placed after sgtl5000 device.

> 
> Can't you use any of the existing sgtl5000 regulator bindings to
> describe this supply?

As stated before - this supply enables the output of the amplifier.

Best regards,

Lukasz Majewski

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