linux-kernel - Re: [PATCH 3/5] misc: Driver for APDS990X ALS and proximity sensors

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Date:	Tue, 5 Oct 2010 14:00:49 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	samu.p.onkalo@...ia.com
Cc:	"linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/5] misc: Driver for APDS990X ALS and proximity sensors

> > - not clear how power_state and runtime pm interact - do we in fact need
> >   power state ?
> 
> power_state turns chip on or off. In off state runtime pm is used to
> handle bookkeeping and also handling chip state transitions including
> regulators. Other ideas than separate power_state for this kind of
> control? 

Ok that makes sense.

> 
> 
> > - lux0_input range being fixed seems inconvenient, the sensors I've got
> >   queued here use lux0_input as you do but also provide a read (and
> >   optionally writable) range limit in lux
> > 
> > static DEVICE_ATTR(lux0_sensor_range, S_IRUGO | S_IWUSR,
> > 	als_sensing_range_show, als_sensing_range_store);
> > 
> > and in your case you could just return 65535
> > 
> 
> I'll add that

Cool. I'll bash our sensor queue to fit this API
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