Re: [patch 2.6.24-rc1] resource_len() utility function

[David Brownell <david-b@pacbell.net>]

On Wednesday 24 October 2007, Jeff Garzik wrote:
> With regards to resource reservation...  IMO we should mimic struct 
> pci_dev and add struct resource[] to struct device.

One minor difficulty:  PCI has a limit on the number of BARs,
but other busses don't.  It'd be better as a "struct resource *".


> Just like we have pci_request_regions(), we should also be able to 
> easily to a dev_request_regions().  the implementation should be very 
> close to pci_request_region() and pci_release_region().

Wouldn't it be nicer to have PCI use those dev_*() calls?
Ideally pci_request_region() wraps dev_request_region()...


> Then a dev_iomap() analogue to pci_iomap() should be pretty 
> straightforward to create.

Another minor nit:  addressing the various resource types.
The platform bus code has multiple lookup schemes. 

Calls like resource_iomap() might be more flexible, so that
lookup schemes can stay flexible.

- Dave