Messages in this thread | | | Subject | Re: [linux-usb-devel] Re: OHCI problems with suspend/resume | From | Benjamin Herrenschmidt <> | Date | 01 Aug 2003 00:05:06 +0200 |
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> I suspect that USB should do some non-global PM stuff too. > Hub ports can be suspended when the devices connected to them > are idle for long enough ... that's not something I'd expect > system-wide PM policies to address.
Indeed, this is not addressed, though it may sense to have a way in the device model to call the suspend/resume callbacks of "childs" of a given hub only for that purpose, I don't think this is implemented yet. Maybe talk to Patrick about it.
In general "local" power management (automatic disk spin down, chipset idle-pm, etc...) is ... local to the driver, though you can probably use the power state field of struct device to store your current state if it maps to those semantics.
Ben.
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