From mboxrd@z Thu Jan 1 00:00:00 1970 From: Murali Karicheri Subject: [RFC v1 PATCH 2/2] PCI: update dma configuration from DT Date: Thu, 18 Dec 2014 17:07:05 -0500 Message-ID: <1418940425-2017-3-git-send-email-m-karicheri2@ti.com> References: <1418940425-2017-1-git-send-email-m-karicheri2@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1418940425-2017-1-git-send-email-m-karicheri2@ti.com> Sender: linux-pci-owner@vger.kernel.org To: bhelgaas@google.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, grant.likely@linaro.org, robh+dt@kernel.org, devicetree@vger.kernel.org, arnd@arndb.de, linux-arm-kernel@lists.infradead.org Cc: Murali Karicheri List-Id: devicetree@vger.kernel.org if there is a DT node available for the root bridge's parent device, use the dma configuration from that device node. For example, keystone PCI devices would require dma_pfn_offset to be set correctly in the device structure of the pci device in order to have the correct dma mask. The DT node will have dma-ranges defined for this. This also support using the DT property dma-coherent to allow coherent DMA operation by the PCI device. Signed-off-by: Murali Karicheri --- drivers/pci/probe.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 23212f8..d7dcd6c 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -6,6 +6,7 @@ #include #include #include +#include #include #include #include @@ -1520,6 +1521,7 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) dev->dev.dma_mask = &dev->dma_mask; dev->dev.dma_parms = &dev->dma_parms; dev->dev.coherent_dma_mask = 0xffffffffull; + of_pci_dma_configure(dev); pci_set_dma_max_seg_size(dev, 65536); pci_set_dma_seg_boundary(dev, 0xffffffff); -- 1.7.9.5