Sorry for having been lazy in commenting..

From: Lorenzo Pieralisi <redacted>
Date: Tue, 18 Feb 2014 11:47:31 +0000

+	- min-residency
+		Usage: Required
+		Value type: <prop-encoded-array>
+		Definition: u32 value representing time in microseconds
+			    required for the CPU to be in the idle state to
+			    break even in power consumption terms compared
+			    to idle state idle_standby ([4][5]).

To me this continues to be a bit illdefined. Say we have three states:
0,1,2. State 0 is the idle_standby. Providing a minimum residency for
state 1 compared to state 0 sort of makes sense, but if we provide a
minimum residency for state 2 compared to state 0 the break even time
is going to be smaller than break even when comparing state 1 and
state 2. With this data we'd enter state 2 when we'd be better off
entering state 1.

	--Antti