From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: Re: [PATCH v3 02/10] devicetree: Add generic IOMMU device tree bindings Date: Fri, 04 Jul 2014 11:05:01 +0200 Message-ID: <9506037.pCJq3zRKJU@wuerfel> References: <1403815790-8548-1-git-send-email-thierry.reding@gmail.com> <1403815790-8548-3-git-send-email-thierry.reding@gmail.com> <9ffe3c3871ef4b60a955259bfa0bed6c@BL2PR03MB468.namprd03.prod.outlook.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <9ffe3c3871ef4b60a955259bfa0bed6c-AZ66ij2kwaacCcN9WK45f+O6mTEJWrR4XA4E9RH9d+qIuWR1G4zioA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Varun Sethi Cc: Mark Rutland , Will Deacon , Thierry Reding , Paul Walmsley , Stephen Warren , Marc Zyngier , Dave Martin , "devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , Pawel Moll , Ian Campbell , Grant Grundler , Allen Martin , Rob Herring , "linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , Cho KyongHo , "linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org" , "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org" , Kumar Gala , Rhyland Klein List-Id: devicetree@vger.kernel.org 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