powerpc/opal/power-mgt.txt

5 idle states. The description of these idle states is exposed via the
10 Typically each idle state has the following associated properties:
12 - name: The name of the idle state as defined by the firmware.
14 - flags: indicating some aspects of this idle states such as the
16          idle states and so on. The flag bits are as follows:
19 		CPU from idle to running.
22 		    this idle state in order to accrue power-savings
27 The following properties provide details about the idle states. These
29 provides the value of that property for the idle state associated with
32 If idle-states are defined, then the properties
33 "ibm,cpu-idle-state-names" and "ibm,cpu-idle-state-flags" are
37 - ibm,cpu-idle-state-names:
38 	Array of strings containing the names of the idle states.
40 - ibm,cpu-idle-state-flags:
42 	flags associated with the aforementioned idle-states. The
60 - ibm,cpu-idle-state-latencies-ns:
62 	exit-latencies (in ns) for the idle states in
63 	ibm,cpu-idle-state-names.
65 - ibm,cpu-idle-state-residency-ns:
67 	target-residency (in ns) for the idle states in
68 	ibm,cpu-idle-state-names. On POWER8 this is an optional
73 - ibm,cpu-idle-state-psscr:
75 	PSSCR for each of the idle states in ibm,cpu-idle-state-names.
78 - ibm,cpu-idle-state-psscr-mask:
81 	entries of ibm,cpu-idle-state-psscr. This property is
85 	ibm,cpu-idle-state-psscr-mask value to 0xf, it implies that
87 	in ibm,cpu-idle-state-psscr should be considered by the
88 	kernel. For such idle states, the kernel would set the
102 	ibm,cpu-idle-state-psscr-mask, the kernel expects all the
104 	ibm,cpu-idle-state-psscr to be correctly set by the firmware.
106 - ibm,cpu-idle-state-pmicr:
108 	for the idle states in ibm,cpu-idle-state-names. This 64-bit
114 - ibm,cpu-idle-state-pmicr-mask:
117 	entries in ibm,cpu-idle-state-pmicr. This is an optional