Subject: Re: merge of freebsd eventhandler
To: Brett Lymn <firstname.lastname@example.org>
From: Matthias Drochner <M.Drochner@fz-juelich.de>
Date: 05/27/2006 16:43:40
> +.Fn powerhook_establish "void (*fn)(void *a, int why)" "void *arg"
Imho hooks initiated by individual drivers are not the way
to go for power management in the future. Power management
requests should travel along the device tree instead.
-Things on a bus depend on each other. So eg one can't enter
state B2 on a PCI bus (means "clock stopped") if not all
devices on the bus support D2 or D3hot (where D3hot might
be out of question for other reasons). Also, budgeting
for standby power and enabling of wakeup events must be
-There is no namespace generic enough for the "why" arguments
telling the devices which state to enter. The SOFTSUSPEND
etc might be good enough for the user interface, but drivers
need more specific directions which are bus dependant.