From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vinod Koul Subject: Re: [PATCH 4/9] dmaengine: pl330: add new items for pl330 private data Date: Fri, 11 Dec 2015 14:59:10 +0530 Message-ID: <20151211092909.GW1854@localhost> References: <1449199466-6081-1-git-send-email-annie.wang@amd.com> <1449199466-6081-5-git-send-email-annie.wang@amd.com> <20151210040909.GM1854@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: 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: "Wang, Annie" Cc: "Li, Tony" , "Wan, Vincent" , Greg Kroah-Hartman , "Rafael J. Wysocki" , "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org" , "Huang, Ray" , Borislav Petkov , "linux-serial-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , Mika Westerberg , "Xue, Ken" List-Id: iommu@lists.linux-foundation.org On Thu, Dec 10, 2015 at 06:38:09AM +0000, Wang, Annie wrote: > > > >Why not DT or ACPI for this? > > > We choose to use private data, as pl330 already has struct dma_pl330_platdata. > Physically DMA share ACPI device with UART, however, BIOS believes DMA and UART is one device. > We can't get irq share info from ACPI. And we don't use DT. > That should be then a MFD device -- ~Vinod