Loading Documentation/power/devices.txt +5 −4 Original line number Original line Diff line number Diff line Loading @@ -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 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 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 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 analogously for all of the remaining callbacks. In other words, power domain callbacks, if defined for the given device, always take precedence over management domain callbacks, if defined for the given device, always take the callbacks provided by the device's subsystem (e.g. bus type). 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 The support for device power management domains is only relevant to platforms needing to use the same device driver power management callbacks in many needing to use the same device driver power management callbacks in many Loading @@ -598,7 +599,7 @@ it into account in any way. Device Low Power (suspend) States Device Low Power (suspend) States --------------------------------- --------------------------------- Device low-power states aren't standard. One device might only handle 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" "on" (how many engines are active?), plus a state that gets back to "on" faster than from a full "off". faster than from a full "off". Loading Loading
Documentation/power/devices.txt +5 −4 Original line number Original line Diff line number Diff line Loading @@ -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 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 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 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 analogously for all of the remaining callbacks. In other words, power domain callbacks, if defined for the given device, always take precedence over management domain callbacks, if defined for the given device, always take the callbacks provided by the device's subsystem (e.g. bus type). 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 The support for device power management domains is only relevant to platforms needing to use the same device driver power management callbacks in many needing to use the same device driver power management callbacks in many Loading @@ -598,7 +599,7 @@ it into account in any way. Device Low Power (suspend) States Device Low Power (suspend) States --------------------------------- --------------------------------- Device low-power states aren't standard. One device might only handle 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" "on" (how many engines are active?), plus a state that gets back to "on" faster than from a full "off". faster than from a full "off". Loading
