Re: [PATCH 1/3] iio: hx711: add data-ready-delay-ns property in DT

From: Jonathan Cameron
Date: Sun Jun 24 2018 - 09:49:08 EST


On Sun, 24 Jun 2018 15:28:59 +0200
Andreas Klinger <ak@xxxxxxxxxxxxx> wrote:

> Hi Jonathan,
>
> Jonathan Cameron <jic23@xxxxxxxxxx> schrieb am Sun, 24. Jun 14:10:
> > On Sat, 23 Jun 2018 20:54:21 +0200
> > Andreas Klinger <ak@xxxxxxxxxxxxx> wrote:
> >
> > > add data-ready-delay-ns property for hx711 ADC
> > > this is the delay after rising PD_SCK until DOUT is read and assumed to be
> > > ready
> > >
> > > Signed-off-by: Andreas Klinger <ak@xxxxxxxxxxxxx>
> >
> > One unconnected change. I'm not sure it's wrong as such but it should not
> > be in this patch.
> >
> > > ---
> > > Documentation/devicetree/bindings/iio/adc/avia-hx711.txt | 9 ++++++++-
> > > 1 file changed, 8 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt b/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt
> > > index b3629405f568..8c9bcaa4d750 100644
> > > --- a/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt
> > > +++ b/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt
> > > @@ -8,11 +8,18 @@ Required properties:
> > > See Documentation/devicetree/bindings/gpio/gpio.txt
> > > - avdd-supply: Definition of the regulator used as analog supply
> > >
> > > +Optional properties:
> > > + - data-ready-delay-ns: additional delay in nanoseconds between rising of
> > > + PD_SCK until DOUT is ready
> > > + should be less then maximum PD_SCK high time which
> > > + is 50000 in the datasheet
> > > +
> > > Example:
> > > -weight@0 {
> > > +weight {
>
> The device tree compiler (dtc) gives a warning if there is no reg = <...>
> setting. That's why i changed it to be without @0.
>
> Should i create an individual patch for this change in this series or
> create another patch which is unrelated to this series?

Either is fine by me. It's such a trivial change that it really doesn't
matter.

Jonathan

>
> Andreas
>
> >
> > Change has nothing to do with this patch...
> >
> > > compatible = "avia,hx711";
> > > sck-gpios = <&gpio3 10 GPIO_ACTIVE_HIGH>;
> > > dout-gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;
> > > avdd-suppy = <&avdd>;
> > > + data-ready-delay-ns = <1000>;
> > > };
> > >
> >
>