On 12/19, Jonathan Cameron wrote: > On Wed, 18 Dec 2024 14:46:14 -0600 > David Lechner <dlechner@xxxxxxxxxxxx> wrote: > > > On 12/18/24 8:38 AM, Marcelo Schmitt wrote: > > > ADCs can have different input configurations such that developers can get > > > confused when trying to model some of them into IIO channels. > > > ... > > > Add documentation about common ADC characteristics and IIO support for them. > > > > > > [1]: https://lore.kernel.org/linux-iio/0fef36f8-a7db-40cc-86bd-9449cb4ab46e@xxxxxxxxx/ > > > [2]: https://www.analog.com/en/resources/technical-articles/sar-adc-input-types.html. > > > > > > Signed-off-by: Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx> > > > --- > > ... > > > +1. ADC Channel Types > > > +==================== > > > + > > > +ADCs can have distinct types of inputs, each of them measuring analog voltages > > > +in a slightly different way. An ADC digitizes the analog input voltage over a > > > +span given by the provided voltage reference, the input type, and the input > > > +polarity. The input range allowed to an ADC channel is needed to determine the > > > +scale factor and offset needed to obtain the measured value in real-world > > > +units (millivolts for voltage measurement, milliamps for current measurement, > > > +etc.). > > Add some 'weasel' words in here. There are more complex non linear ADCs and ones > only capable of reaching some fraction of the reference voltage. > Maybe throw in a "generally" somewhere. V2 will come with a short paragraph with a disclaimer for complex ADCs :) Thanks, Marcelo
