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

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

[Andreas Klinger]

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@it-klinger.de>
---
 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 {
 	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>;
 };
 
-- 
2.1.4

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

[Jonathan Cameron]

On Sat, 23 Jun 2018 20:54:21 +0200
Andreas Klinger <ak@it-klinger.de> 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@it-klinger.de>

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 {

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>;
>  };
>  

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

[Andreas Klinger]

Hi Jonathan,

Jonathan Cameron <jic23@kernel.org> schrieb am Sun, 24. Jun 14:10:
> On Sat, 23 Jun 2018 20:54:21 +0200
> Andreas Klinger <ak@it-klinger.de> 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@it-klinger.de>
> 
> 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?

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>;
> >  };
> >  
> 

-- 

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

[Jonathan Cameron]

On Sun, 24 Jun 2018 15:28:59 +0200
Andreas Klinger <ak@it-klinger.de> wrote:

> Hi Jonathan,
> 
> Jonathan Cameron <jic23@kernel.org> schrieb am Sun, 24. Jun 14:10:
> > On Sat, 23 Jun 2018 20:54:21 +0200
> > Andreas Klinger <ak@it-klinger.de> 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@it-klinger.de>  
> > 
> > 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>;
> > >  };
> > >    
> >   
>