Hello all. I'm working on a driver (posted here previously) for the INA209 chip. The chip itself has support for power and current readings, though they will only be valid if a special calibration register is set appropriately. The units used for interpreting the power and current registers change depending on the value in the calibration register; they are not constant. It is possible to calculate the power and current from userspace using the sense resistor reading + the sense resistor value (which changes between implementations). I am aware of the "calculate" lines in sensors3.conf, which should be able to do this kind of calculation. My previous postings of this driver have mostly been ignored, probably due to set the calibration register before use. This is something not supported by the hwmon sysfs-interface. Using the userspace sensors program to handle this instead removes the need to set the calibration register. I have two possible solutions: 1) Have curr1_input output the sense resistor voltage in mV and use the sensors program (using "calculate") to convert it appropriately 2) Have curr1_input always read back 0 uA, and have the sensors program use in0_input (the sense resistor voltage in mV) in the calculate line, ignoring the reading from curr1_input I can figure out how to use calculate for #1, but I cannot figure out how to reference a different sensor in a calculate line. The documentation claims this is possible, but I cannot find any examples. Which of these two solutions would be more acceptable? Thanks, Ira
