From: Pavel Machek <pavel@ucw.cz>
To: "Gaëtan Carlier" <gcembed@gmail.com>
Cc: linux-leds@vger.kernel.org
Subject: Re: Add driver for MCP45HV51 (digital potentiometer)
Date: Wed, 3 Jan 2018 21:02:38 +0100 [thread overview]
Message-ID: <20180103200237.GA6261@amd> (raw)
In-Reply-To: <13bcf912-56c7-5f18-aef7-4a5f5332e30d@gmail.com>
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Hi!
> >>Is that _output_ device? What does it control?
> >>
> >> Pavel
> >>
> >
> >It is an output with a variable resistance (like DAC is an output with a
> >variable voltage).[1]
> >So regarding the webpage of IIO[2], digital potentiometer must be coded on
> >IIO API.
Well.. you could argue soundcard is DAC with variable output voltage,
too.
In kernel, we group devices according to the function, not hw implementation.
Anyway, go for IIO, its likely good match.
> >[1] https://en.wikipedia.org/wiki/Digital_potentiometer
> >[2] https://wiki.analog.com/software/linux/docs/iio/iio
> After a deeper search on a recent branch, potentiometer are already handled
> in IIO layer :D
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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prev parent reply other threads:[~2018-01-03 20:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-03 16:08 Add driver for MCP45HV51 (digital potentiometer) Gaëtan Carlier
2018-01-03 17:56 ` Pavel Machek
2018-01-03 18:38 ` Gaëtan Carlier
2018-01-03 19:00 ` Pavel Machek
2018-01-03 19:25 ` Gaëtan Carlier
2018-01-03 19:37 ` Gaëtan Carlier
2018-01-03 20:02 ` Pavel Machek [this message]
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