Re: [Letux-kernel] [PATCH 0/4] mfd: rn5t618: Extend ADC support

[Andreas Kemnade]

On Sat, 3 Jul 2021 18:39:40 +0200
Andreas Kemnade <andreas@xxxxxxxxxxxx> wrote:

> Hi,
> 
> On Sat, 3 Jul 2021 16:59:50 +0100
> Jonathan Cameron <jic23@xxxxxxxxxx> wrote:
> 
> > On Sat,  3 Jul 2021 10:42:20 +0200
> > Andreas Kemnade <andreas@xxxxxxxxxxxx> wrote:
> >   
> > > Add devicetree support so that consumers can reference the channels
> > > via devicetree, especially the power subdevice can make use of that
> > > to provide voltage_now properties.    
> > 
> > Does the mapping vary from board to board?  Often these mappings are
> > internal to the chip so might as well be provided hard coded in the
> > relevant drivers rather than via DT. See drivers that have iio_map
> > structure arrays.
> >   
> Most things are internal to the chip, but 
> AIN1/AIN0 are external and could be connected to anything.
> 
hmm, iio_map stuff looks nice, so before messing with devicetree,
I could solve 90% of the problem by just using iio_map? For my use
cases it is enough to have the internal stuff at the moment. That would
simplify stuff a lot.

So I could go forward with the iio_map stuff now, and if there is a use
case for AIN1/0, the devicetree stuff can be added later?

Regards,
Andreas