On Thursday, 22 March 2007 20:26, Tony Lindgren wrote: > Hi, > > * David Brownell <david-b@xxxxxxxxxxx> [070322 14:30]: > > On Thursday 22 March 2007 6:44 am, Scott E. Preece wrote: > > > | From: "Rafael J. Wysocki" <rjw@xxxxxxx> > > > | > > > | I think we can define "standby" a bit more precisely. Something like: > > > | - processes are frozen, > > > | - devices are suspended, > > > > True of all sleep states, although one wants "suspended" to > > allow different levels of device functionality. (Maybe it > > can wake up, maybe its firmware is monitoring the WLAN, etc.) > > In addition to offering wakeup events for individual devices, > the device suspend states should be something like retention > and suspend, where: > > Retention is where clocks are off for a device, but power is on. > In this case the device registers are maintained in hardware. > > Suspend is where clocks and power are off. In this state the > device registers are maintained in software. > > Laptops mostly have suspend, while socs allow both retention > and suspend in many cases. I think there can be more low-power states that just "standby", "STR", "STD", etc., but for example "standby" should be at least comparable between different platforms. Greetings, Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
