On Mon, Jan 13, 2014 at 06:15:24AM +0000, li.xi...@freescale.com wrote: > > I would expect the of_device_is_available() check to be done by the > > driver core rather than by individual drivers - every single driver > > should have that check. Is this not happening? The check for np is OK > > though.
> Yes, I hasn't found the core driver does that for now... Are you sure, we actively use the ability to mark devices as unavailable on some systems? > And IMO this is needed since the SAI driver is only base dts. And maybe > the device is not presently operational, but it might become operational > in the future (for example, something is not plugged in, or switched off). > Or A serious error was detected in the device, and it is unlikely to become > operational without repair... I'm sorry but I don't understand what you're saying here at all. These are all things that might happen but I don't see the connection between them and the benefits of implementing things in the core - surely the more functionality there is the more useful it's going to be to factor all the code out into the driver core?
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