Re: [RFC] Fix Device Power Management States

[Russell King <rmk+lkml@arm.linux.org.uk>]

On Tue, Aug 10, 2004 at 06:47:38PM -0700, Todd Poynor wrote:
> Divorcing device power states from ACPI-defined integers would be very 
> nice for embedded platforms.  Usually the platform bus would be 
> involved.  Since the proposal tends to place more responsibility on the 
> bus driver, I'm interested in the intended usage for platform devices. 
> For example, are platform_device callbacks for 
> suspend/resume/save/restore of the particular device still needed?  How 
> does the platform bus driver map (platform-specific?) system states to 
> device states?

platform devices are still a reminance of the previous PM model
incarnation, and where merely patched over to make them work again
in todays model.

It would be nice to have a proper platform_device_driver structure
so we could finally kill the otherwise unused PM methods in struct
device_driver and finally get rid of the old PM model.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 PCMCIA      - http://pcmcia.arm.linux.org.uk/
                 2.6 Serial core