[PATCHv3] dt-bindings: Avago APDS990X light sensor
From: Pavel Machek
Date: Mon Jan 08 2018 - 17:21:01 EST
Hi!
> > From: Filip MatijeviÄ <filip.matijevic.pz@xxxxxxxxx>
> >
> > This prepares binding for light sensor used in Nokia N9.
>
> "dt-bindings: ..." is the preferred subject prefix.
Ok.
> > +++ b/Documentation/devicetree/bindings/misc/avago-apds990x.txt
>
> Put this with other light sensors whether you use IIO or not:
>
> bindings/iio/light/
Makes sense. Patches to convert to IIO are available.
> > @@ -0,0 +1,41 @@
> > +Avago APDS990X driver
>
> Bindings aren't drivers.
Ok.
> > +https://docs.broadcom.com/docs/AV02-2867EN
> > +
> > +Required properties:
> > +- compatible: "avago,apds990x"
> > +- reg: address on the I2C bus
> > +- interrupts: external interrupt line number
> > +- vdd-supply: power supply for VDD
> > +- vled-supply: power supply for LEDA
> > +- avago,ga: Glass attenuation
>
> We already have "upisemi,glass-coef". Can we align on something
> common.
upisemi seems to have different units (1/1000 vs. 1/4096). Do you want
me to do change to avago,glass-coef or ....?
> > +- avago,cf1: Clear channel factor 1
> > +- avago,irf1: IR channel factor 1
> > +- avago,cf2: Clear channel factor 2
> > +- avago,irf2: IR channel factor 2
>
> Perhaps 2 properties with 2 cells for factor 1 and 2.
This is obviously easier to keep, but I can change.
> > +- avago,df: Device factor
>
> Units/range for all these?
Fixed point, with 4096 == 1.00.
> > +- avago,pdrive: IR current, one of APDS_IRLED_CURR_XXXmA values
>
> Don't we have standard current property for LEDs?
We do have "led-max-microamp"; which is not quite what this is. I
guess we can do "led-microamp" if you prefer?
> > +- avago,ppcount: Proximity pulse count
>
> Is this standard for prox sensors?
I don't know many proximity sensors. Seems like way to raise sensitivity.
Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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