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Date:	Mon, 06 Oct 2014 20:44:35 +0200
From:	Arnd Bergmann <>
To:	Matthew Garrett <>
Cc:	Suravee Suthikulanit <>,,,,,,,,,,,,,,,,
	"Duran, Leo" <>, Jon Masters <>
Subject: Re: [PATCH 1/4] ata: ahci_platform: Add ACPI support for AMD Seattle SATA controller

On Monday 06 October 2014 19:21:53 Matthew Garrett wrote:
> On Mon, Oct 06, 2014 at 08:19:37PM +0200, Arnd Bergmann wrote:
> > 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.

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