Re: [linux-pm] [PATCH] Custom power states for non-ACPI systems

[Todd Poynor <tpoynor@mvista.com>]

Pavel Machek wrote:
...
> ...but adding new /sys/power/state might be okay. We should not have
> introduced "standby" in the first place [but I guess it is not worth
> removing now]. If something has more than 2 states (does user really
> want to enter different states in different usage?), I guess we can
> add something like "deepmem" or whatever. Is there something with more
> than 3 states?

In most of the cases I'm thinking of, it wouldn't be a user requesting a 
state but rather software (say, a cell phone progressively entering 
lower power states due to inactivity).  I haven't noticed a platform 
with more than 3 low-power modes so far, but I'm sure it'll happen soon. 
  If the time isn't right for incompatible changes to these interfaces 
then I guess mapping standby and mem to platform-specific things will 
work for now, maybe with some tweak to allow a choice of actual state 
entered.  At some more opportune time in the future I'll suggest an 
attribute that allows a choice of platform-specific method of 
suspend-to-mem, somewhat like the "disk" attribute for suspend-to-disk. 
  Thanks,

-- 
Todd