On Mon, 15 Mar 2010, Rafael J. Wysocki wrote: > In fact, I'd like the "legacy" callbacks to go, at least at the subsystem > level, so I'd prefer not to make it easier to keep them around. > > How many bus types are there and how many of them actually implement power > management callbacks? I don't really think the issue is so big.
I have no idea. But I'm in the middle of implementing runtime PM for SCSI. SCSI already has bus-level legacy callbacks, so to add the runtime methods without changing the existing system sleep behavior requires something like this. The alternative is to write a bunch of tiny "shim" functions, sort of like what I ended up doing in the USB stack (see usb_dev_prepare() and the following routines in drivers/usb/core/usb.c). Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
