On Thu, Sep 04, 2014 at 09:14:12AM +0200, Pavel Machek wrote: > > When CONFIG_PM_DEBUG=y, we provide a sysfs file (/sys/power/pm_test) for > > selecting one of a few suspend test modes, where rather than entering a > > full suspend state, the kernel will perform some subset of suspend > > steps, wait 5 seconds, and then resume back to normal operation. > > > > This mode is useful for (among other things) observing the state of the > > system just before entering a sleep mode, for debugging or analysis > > purposes. However, a constant 5 second wait is not sufficient for some > > sorts of analysis; for example, on an SoC, one might want to use > > external tools to probe the power states of various on-chip controllers > > or clocks. > > When you are doing this kind of analysis, perhaps directly modifying > kernel source is the way to go ...?
That's what I've been doing for now, but I have a few engineers who need to do this sort of testing and aren't kernel developers. I could continue to maintain my own patch for this, but I just thought I'd see what others thought. Is there a good reason this can't be in mainline? These features are hidden behind a Kconfig symbol called PM_DEBUG anyway, and I think this classifies as a pretty simple extension to the limited existing PM debugging options. Regards, Brian -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
