linux-kernel - Re: [PATCH v3 02/10] devicetree: Add generic IOMMU device tree bindings

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Date:	Fri, 04 Jul 2014 11:05:01 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Varun Sethi <Varun.Sethi@...escale.com>
Cc:	Thierry Reding <thierry.reding@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Will Deacon <will.deacon@....com>,
	Joerg Roedel <joro@...tes.org>,
	Olav Haugan <ohaugan@...eaurora.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Grant Grundler <grundler@...omium.org>,
	Rhyland Klein <rklein@...dia.com>,
	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Marc Zyngier <marc.zyngier@....com>,
	Allen Martin <amartin@...dia.com>,
	Paul Walmsley <pwalmsley@...dia.com>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	Cho KyongHo <pullip.cho@...sung.com>,
	Dave Martin <Dave.Martin@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 02/10] devicetree: Add generic IOMMU device tree bindings

On Friday 04 July 2014 06:42:48 Varun Sethi wrote:
> Master node corresponds to the device node, right? Master ID would correspond
> to Stream ID? We are already using "iommu-parent" property to link a device
> to its corresponding IOMMU. We can use the same property instead of using "iommus".

I don't see "iommu-parent" used anywhere, just "fsl,iommu-parent". We can
probably allow "fsl,iommu-parent" as an alias for "iommus" for backwards-
compatibility if that helps you on PowerPC. For ARM, I'd prefer to mandate
that we use just "iommus".

	Arnd
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