[RFC Patch 1/4] mfd: AXP20x: Add power supply bindings documentation

[Bruno Prémont]

On Tue, 21 October 2014 Lee Jones <lee.jones at linaro.org> wrote:
> On Mon, 20 Oct 2014, Bruno Prémont wrote:
> > ---
> > Note: the OCV values seem to have some defaults build into the
> > PMIC though may need adjustment if the used battery has a different
> > open circuit voltage curve.
> > As far as understood (these values are set in vendor driver but not
> > mentioned in chip documentation) they represent charge percentage
> > for some predefined voltages.
> > 
> > If prefixing these values with "x-power," is preferred the following
> > patch should becomes a dependency:
> >   http://lists.infradead.org/pipermail/linux-arm-kernel/2014-June/267606.html
> > and users in patch 2/4, 4/4 need adjusting.
> > 
> > 
> >  Documentation/devicetree/bindings/mfd/axp20x.txt |   20 +
> >  1 files changed, 20 insertions(+), 0 deletion(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/mfd/axp20x.txt b/Documentation/devicetree/bindings/mfd/axp20x.txt
> > index cc9e01b..8ea681c 100644
> > --- a/Documentation/devicetree/bindings/mfd/axp20x.txt
> > +++ b/Documentation/devicetree/bindings/mfd/axp20x.txt
> > @@ -28,6 +28,20 @@ Required properties:
> >  		      (range: 750-1875). Default: 1.5MHz
> >  
> >  Optional properties for DCDCs:
> > +- backup: Settings for backup/RTC battery charger
> > +	  (Voltage in µV, current in µA)
> > +	  If not present, charger will be left untouched
> > +- battery.ocv: OCV capacity curve points (16 data values)
> > +- battery.resistance: internal battery resistance in mΩ
> > +                      (defaults to 100mΩ)
> > +- battery.capacity: Battery capacity in mAh
> > +		    If this attribute is missing, charger will be disabled
> > +		    unless there is a battery connected.
> > +- battery.temp_sensor: Description of temperautre sensor, 3 values
> > +		       - driver current (20µA, 40µA, 60µA or 80µA)
> > +		       - low temperature warning level (in µV)
> > +		       - high temperature warning level (in µV)
> > +		       If missing, temperature sensor gets disabled
> >  - x-powers,dcdc-workmode: 1 for PWM mode, 0 for AUTO mode
> >  			  Default: AUTO mode
> >  
> > @@ -49,6 +63,12 @@ axp209: pmic at 34 {
> >  	ldo3in-supply = <&axp_ipsout_reg>;
> >  	ldo5in-supply = <&axp_ipsout_reg>;
> >  
> > +	backup = <3000000 200>;
> > +	battery.ocv = <0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0>;
> > +	battery.resistance = <0>;
> > +	battery.capacity = <2000>;
> > +	battery.temp_sensor = <20 1000000 4000000>;
> 
> Since when do we use '.'s in property names?

I've not found guidelines on this, but whatever is the right way to
name them, I'm open for suggestions.

Bruno

> >  	regulators {
> >  		x-powers,dcdc-freq = <1500>;
> >  
>