On Mon, Aug 12, 2013 at 12:08:17PM -0600, Stephen Warren wrote: > In a similar way, I wonder if the USB case can be considered the same > way? This seems less like a good fit since I don't expect the resources > are always so similar there, and also there's the case of the bus being > potentially behind a few levels of USB hub. That won't work for the hub on Arndale in a system where it's fully wired up - it's got an I2C interface for control and the idea is that you bring it out of reset, write the configuration out via I2C and then you can complete startup using a GPIO or another I2C command. > And of course it all gets a little more messy when you get > board-specific logic that needs setup, rather than something more common > across multiple devices. I think we could probably cover many cases by putting common things onto the bus but we still need to confront the cases where the device driver really does need to get involved in what's going on. Things like the SDIO WiFi cards seem very interchangable as you say and would probably benefit a lot but there's other applications that are less regular.
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