Hi Peter, On Wed, Sep 22, 2021 at 4:27 AM Peter Rosin <peda@xxxxxxxxxx> wrote: > Basically, the whole point is that you simply don't. The iio-mux exposes > the channels as 8 new ADCs, and whenever you read a value from one of > them, the iio-mux operates the gpios for you, giving you the impression > that you have 8 independet ADCs. They are of course not independent, but... Thanks for the clarification. It was helpful. > That's exposed to user-space as: > > $ ls "/sys/bus/iio/devices/iio:device3" > in_altvoltage2_compare_interval in_altvoltage5_scale > in_altvoltage2_invert in_altvoltage6_compare_interval > in_altvoltage2_raw in_altvoltage6_invert > in_altvoltage2_scale in_altvoltage6_raw > in_altvoltage3_compare_interval in_altvoltage6_scale > in_altvoltage3_invert in_altvoltage7_compare_interval > in_altvoltage3_raw in_altvoltage7_invert > in_altvoltage3_scale in_altvoltage7_raw > in_altvoltage4_compare_interval in_altvoltage7_scale > in_altvoltage4_invert name > in_altvoltage4_raw of_node > in_altvoltage4_scale power > in_altvoltage5_compare_interval subsystem > in_altvoltage5_invert uevent > in_altvoltage5_raw > $ cat "/sys/bus/iio/devices/iio:device3/name" > envelope-detector-mux Ah, so that's my issue then. I don't see a new device inside /sys/bus/iio/devices/. I only see the original stmpe ADC: ls "/sys/bus/iio/devices/iio:device0" dev in_voltage5_raw in_voltage_scale power in_temp8_input in_voltage6_raw name subsystem in_voltage4_raw in_voltage7_raw of_node uevent Maybe my dts is not correct to make the mux appear under /sys/bus/iio/devices/iio:device1. Here is my dts that shows more context with the STMPE811 ADC: https://pastebin.com/raw/7Nn2aAtN stmpe811 is an mfd device that can be used as a touchscreen and as a normal adc. I only use the adc functionality. Any suggestions are welcome. Thanks, Fabio Estevam
