From mboxrd@z Thu Jan 1 00:00:00 1970 From: grygorii.strashko@ti.com (Grygorii Strashko) Date: Mon, 25 Apr 2016 22:21:34 +0300 Subject: [PATCH] usb: dwc3: host: inherit dma configuration from parent dev Message-ID: <1461612094-30939-1-git-send-email-grygorii.strashko@ti.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Now not all DMA paremters configured properly for "xhci-hcd" platform device which is created manually. For example: dma_pfn_offset, dam_ops and iommu configuration will not corresponds "dwc3" devices configuration. As result, this will cause problems like wrong DMA addresses translation on platforms with LPAE enabled like Keystone 2. When platform is using DT boot mode the DMA configuration will be parsed and applied from DT, so, to fix this issue, reuse of_dma_configure() API and retrieve DMA configuartion for "xhci-hcd" from DWC3 device node. Cc: David Fisher Cc: Catalin Marinas Cc: "Thang Q. Nguyen" Cc: Yoshihiro Shimoda Signed-off-by: Grygorii Strashko --- drivers/usb/dwc3/host.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c index c679f63..93c8ef9 100644 --- a/drivers/usb/dwc3/host.c +++ b/drivers/usb/dwc3/host.c @@ -17,6 +17,7 @@ #include #include +#include #include "core.h" @@ -32,12 +33,7 @@ int dwc3_host_init(struct dwc3 *dwc) return -ENOMEM; } - dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask); - xhci->dev.parent = dwc->dev; - xhci->dev.dma_mask = dwc->dev->dma_mask; - xhci->dev.dma_parms = dwc->dev->dma_parms; - dwc->xhci = xhci; ret = platform_device_add_resources(xhci, dwc->xhci_resources, @@ -62,6 +58,15 @@ int dwc3_host_init(struct dwc3 *dwc) phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy", dev_name(&xhci->dev)); + if (IS_ENABLED(CONFIG_OF) && dwc->dev->of_node) { + of_dma_configure(&xhci->dev, dwc->dev->of_node); + } else { + dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask); + + xhci->dev.dma_mask = dwc->dev->dma_mask; + xhci->dev.dma_parms = dwc->dev->dma_parms; + } + ret = platform_device_add(xhci); if (ret) { dev_err(dwc->dev, "failed to register xHCI device\n"); -- 2.8.1