On Wed, Apr 02, 2003 at 12:27:47AM +0100, Dave Jones wrote: > On Mon, Mar 31, 2003 at 10:44:39PM -0800, Greg KH wrote: > > > Well, you had cV for PSU voltages and mV for cpu core voltage. I guess mV > > > and mili-deg-C everywhere would be nicer. > > As for why no floating point, it's a pain in the but to both output a > > fixed point number from the kernel into floating point, and to parse a > > floating point number from userspace within the kernel, turning it into > > a fixed point number. With the proposal I wrote up, none of that is > > needed, and all userspace has to do is divide by a factor of 10 to get > > the proper value. > > FWIW, I'm taking the same fixed-point millivolt approach with the > sysfs overrides for cpufreq. Having similar things in sysfs > exporting the same units seems to be a good idea. Hm, in looking around the kernel some more, it seems that there are a number of other places that export voltage and temperature values (ACPI being one of the most obvious.) It might be time to start thinking of a single userspace library to access all of these kinds of values in a system, instead of having to probe around different parts of the sysfs tree by hand... thanks, greg k-h
