From: Arnd Bergmann <arnd@arndb.de>
To: Rob Herring <robherring2@gmail.com>
Cc: "linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
        Mark Rutland <mark.rutland@arm.com>, Joel Schopp <Joel.Schopp@amd.com>,
        Thomas Lendacky <Thomas.Lendacky@amd.com>,
        Marc Zyngier <marc.zyngier@arm.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>,
        Liviu Dudau <liviu.dudau@arm.com>
Subject: Re: [PATCH V3] arm64: amd-seattle: Adding device tree for AMD Seattle platform
Date: Thu, 20 Nov 2014 16:23:16 +0100
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On Thursday 20 November 2014 09:16:31 Rob Herring wrote:
> 
> >> +             dma-coherent;
> >> +     };
> >
> > Same here: you list it as coherent, but not 64-bit DMA capable.
> > Is that intentional?
> 
> AHCI controllers are probeable as to whether they support 64-bit DMA or not.
> 

The controller is, but the bus is not, so we also need the dma-ranges
property in the bus.

	Arnd
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