Hi Peter, On Wed, Sep 22, 2021 at 11:28 AM Peter Rosin <peda@xxxxxxxxxx> wrote: > Nice! > > While I don't completely understand that iio-device node in the beaglebone > dts that didn't work for you, it looks like it's just a renumbering thing? The beaglebone dts uses some undocumented properties such as: iio-channels and iio-channel-names. > However, your version only remapped 4 channels, and in that case your new > iio-device only had those, i.e. 0-3. But the iio-mux was looking for the > missing channel 4. Maybe that was why that variant didn't work? Yes, this is where I got confused. The stmpe811 has 8 channels. On the apalis board, the first four channels (0 to 3) are used for touchscreen. The other 4 channels are for general purpose. The ADC that is connected to the MUX is channel 4 (which is the first one that is free for general usage), so I had to pass: io-channels = <&adc0 0>; in the mux, instead of io-channels = <&adc0 4> that I was originally trying. and now the mapping is correct and I can read proper voltages when I switch the mux. Thanks!
