diff options
Diffstat (limited to 'Documentation/power')
| -rw-r--r-- | Documentation/power/devices.txt | 9 | ||||
| -rw-r--r-- | Documentation/power/swsusp.txt | 5 |
2 files changed, 10 insertions, 4 deletions
diff --git a/Documentation/power/devices.txt b/Documentation/power/devices.txt index 872815cd41d3..504dfe4d52eb 100644 --- a/Documentation/power/devices.txt +++ b/Documentation/power/devices.txt @@ -583,9 +583,10 @@ for the given device during all power transitions, instead of the respective subsystem-level callbacks. Specifically, if a device's pm_domain pointer is not NULL, the ->suspend() callback from the object pointed to by it will be executed instead of its subsystem's (e.g. bus type's) ->suspend() callback and -anlogously for all of the remaining callbacks. In other words, power management -domain callbacks, if defined for the given device, always take precedence over -the callbacks provided by the device's subsystem (e.g. bus type). +analogously for all of the remaining callbacks. In other words, power +management domain callbacks, if defined for the given device, always take +precedence over the callbacks provided by the device's subsystem (e.g. bus +type). The support for device power management domains is only relevant to platforms needing to use the same device driver power management callbacks in many @@ -598,7 +599,7 @@ it into account in any way. Device Low Power (suspend) States --------------------------------- Device low-power states aren't standard. One device might only handle -"on" and "off, while another might support a dozen different versions of +"on" and "off", while another might support a dozen different versions of "on" (how many engines are active?), plus a state that gets back to "on" faster than from a full "off". diff --git a/Documentation/power/swsusp.txt b/Documentation/power/swsusp.txt index ac190cf1963e..92341b84250d 100644 --- a/Documentation/power/swsusp.txt +++ b/Documentation/power/swsusp.txt @@ -33,6 +33,11 @@ echo shutdown > /sys/power/disk; echo disk > /sys/power/state echo platform > /sys/power/disk; echo disk > /sys/power/state +. If you would like to write hibernation image to swap and then suspend +to RAM (provided your platform supports it), you can try + +echo suspend > /sys/power/disk; echo disk > /sys/power/state + . If you have SATA disks, you'll need recent kernels with SATA suspend support. For suspend and resume to work, make sure your disk drivers are built into kernel -- not modules. [There's way to make |