Re: [PATCH v2 2/4] [media] ad5820: Add support for enable pin

Pavel Machek
2018-09-21T00:53:54Z

[-- Attachment #1: Type: text/plain, Size: 1245 bytes --]

On Thu 2018-09-20 21:06:16, Ricardo Ribalda Delgado wrote:
> Hi Pavel
>
> On Thu, Sep 20, 2018 at 8:54 PM Pavel Machek <pavel@ucw.cz> wrote:
> >
> > On Thu 2018-09-20 20:45:52, Ricardo Ribalda Delgado wrote:
> > > This patch adds support for a programmable enable pin. It can be used in
> > > situations where the ANA-vcc is not configurable (dummy-regulator), or
> > > just to have a more fine control of the power saving.
> > >
> > > The use of the enable pin is optional.
> > >
> > > Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
> >
> > Do we really want to do that?
> >
> > Would it make more sense to add gpio-regulator and connect ad5820 to
> > it in such case?
> >
>
> My board (based on db820c) has both:
>
> ad5820: dac@0c {
> compatible = "adi,ad5820";
> reg = <0x0c>;
>
> VANA-supply = <&pm8994_l23>;
> enable-gpios = <&msmgpio 26 GPIO_ACTIVE_HIGH>;
> };

Well, I'm sure you could have gpio-based regulator powered from
pm8994_l23, and outputting to ad5820.

Does ad5820 chip have a gpio input for enable?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 181 bytes --]