On Monday 06 October 2014 19:21:53 Matthew Garrett wrote:

On Mon, Oct 06, 2014 at 08:19:37PM +0200, Arnd Bergmann wrote:

quoted

Interesting. Does this also define a way to get access to registers
that are normally in PCI config space, provided they are accessible at
all?

Unfortunately not. I'd assume that PM registers are expected to be 
accessed via the _PS* methods instead. Does MSI make sense outside the 
context of PCI interrupts?

Yes, the ARM GIC has a weird sense of what MSI is used for, and
apparently some SoC vendors have started using MSI by default for
all on-chip peripherals.

A patch series to extend MSI to platform devices is currently
under review.

	Arnd