Re: [PATCH 1/2] devicetree: power: add bindings for GPIO-driven power switches

From: Jonathan Cameron
Date: Fri Dec 30 2016 - 10:03:24 EST

On 23/12/16 11:40, Lars-Peter Clausen wrote:
> On 12/23/2016 10:07 AM, Geert Uytterhoeven wrote:
>> BTW, I'm not an IIO expert, but from my limited knowledge, it looks like "O"
>> support in IIO is limited to DACs?
> Depends on what you categorize as DACs. There are also
> potentiometer/rheostat drivers. They are kind of like DACs but the unit you
> control are ohm, rather than current or voltage.
Though they are still in staging there are also things like function generators.

I've been mulling doing a driver for the st-powerstep01 parts as well which
is a smart stepper motor controller. At that level we'd need to start describing
the connected stepper motors in DT :) Whole chunk of API to define to do that
though - might well take longer than writing the driver.

So in practice yeah - dac like things, but then on the input side they are almost
all really ADCs with some funny analog stuff on the front end ;)

Arguably switches are 1 bit DACs ;)

The distinction here is whether 'what is passing through' the device is knowable.
So regulators and your power switch are well described. A relay less so unless
we know what load it is switching...

+ it's IIO. We are open to almost anything as long as we aren't stepping on
any toes!


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