Hi Grant, > I've written fixed point math routines in bash to prove the concept, > but if driver scaling has been vetoed, I'd rather know now than > submit something unwanted. lm87 driver almost has it, carrying > scaling factors in private memory, loaded at chip detect time. The rule is: drivers should provide the voltages as seen at their pins. This means that, where scaling is external, it has to be done in user-space, while where scaling is internal, it has to be done by the driver itself. All drivers respect that rule as far as I remember. > * Winbond inX internal scaling -- fullscale is 4096mV, Vref is 3600mV > * > * These sensor chips perform internal scaling for 5V (in3) and 5VSB I don't think so. Can you point us to a datasheet stating this? > Comments? Your code makes sense for external resistors, but not for internal scaling as far as I can see, so it won't be of any help in the drivers. And libsensors mostly works the way you describe already, just not in as formal a way (because compute lines were meant for all values, not just voltages). So all in all I think that you are trying to fix a problem that doesn't exist in the first place, sorry. -- Jean Delvare
