Re: [PATCH 0/3] mxs-lradc: Add support for current sources

On 01.05.2016 20:02, Jonathan Cameron wrote:

On 29/04/16 18:45, Harald Geyer wrote:

quoted

My thinking is that there should be a thermistor (or whatever else) 
driver,
that is a consumer of the regulator and a consumer of the 
IIO_VOLTAGE
iio channel and provides a new device with an IIO_RESISTANCE or 
IIO_TEMP
channel. Maybe there is a simpler solution, that I'm missing?

I agree with that approach - need a way to describe the upstream
hardware - so
will need a thermistor driver

quoted

Actually I'm not 100% happy with the above solution myself, because 
if we
start supporting devices that act as an iio-multiplexer (some device 
that
is an iio consumer and provides many new iio channels and can 
control
via gpios which of it child channels is actually routed to the 
upstream
device) I don't know how to properly manage the regulator device.

Hmm. Are you talking about muxing the regulator as well?  That will 
get
complex indeed.  Might be possible to cheat and imply the regulators 
are
always connected to all inputs...  or do you want to dynamically 
change
the regulator output?  That gets messy fast - though in theory might 
be
possible...

Yes, that's a good summary of what I'm thinking. As there is no
iio-multiplexer yet, this is sort of an academic question. But it's
kind of an obvious thing to want, so we shouldn't be surprised when
somebody actually starts working on that.

Thanks,
Harald