linux-kernel - [PATCH 5/6] dma-mapping: support fsl-mc bus

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Message-Id: <1520260166-29387-6-git-send-email-nipun.gupta@nxp.com>
Date:   Mon,  5 Mar 2018 19:59:25 +0530
From:   Nipun Gupta <nipun.gupta@....com>
To:     will.deacon@....com, robin.murphy@....com, mark.rutland@....com,
        catalin.marinas@....com
Cc:     iommu@...ts.linux-foundation.org, robh+dt@...nel.org, hch@....de,
        m.szyprowski@...sung.com, gregkh@...uxfoundation.org,
        joro@...tes.org, leoyang.li@....com, shawnguo@...nel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linuxppc-dev@...ts.ozlabs.org, bharat.bhushan@....com,
        stuyoder@...il.com, laurentiu.tudor@....com,
        Nipun Gupta <nipun.gupta@....com>
Subject: [PATCH 5/6] dma-mapping: support fsl-mc bus

Signed-off-by: Nipun Gupta <nipun.gupta@....com>
---
 drivers/base/dma-mapping.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c
index 3b11835..2279c4d 100644
--- a/drivers/base/dma-mapping.c
+++ b/drivers/base/dma-mapping.c
@@ -334,6 +334,7 @@ void dma_common_free_remap(void *cpu_addr, size_t size, unsigned long vm_flags)
  * Common configuration to enable DMA API use for a device
  */
 #include <linux/pci.h>
+#include <linux/fsl/mc.h>
 
 int dma_configure(struct device *dev)
 {
@@ -349,6 +350,12 @@ int dma_configure(struct device *dev)
 			dma_dev = dma_dev->parent;
 	}
 
+	if (dev_is_fsl_mc(dev)) {
+		dma_dev = dev;
+		while (dev_is_fsl_mc(dma_dev))
+			dma_dev = dma_dev->parent;
+	}
+
 	if (dma_dev->of_node) {
 		ret = of_dma_configure(dev, dma_dev->of_node);
 	} else if (has_acpi_companion(dma_dev)) {
-- 
1.9.1