@@ -191,6 +191,8 @@ static void of_dma_configure(struct device *dev)
dev_dbg(dev, "dma_pfn_offset(%#08lx)\n", dev->dma_pfn_offset);
}
dev->dma_pfn_offset = offset;
+ dma_set_max_seg_size(dev, size);
+ dma_set_seg_boundary(dev, size);
coherent = of_dma_is_coherent(dev->of_node);
dev_dbg(dev, "device is%sdma coherent\n",
@@ -236,6 +238,7 @@ static struct platform_device *of_platform_device_create_pdata(
dev->dev.bus = &platform_bus_type;
dev->dev.platform_data = platform_data;
+ dev->dev.dma_parms = &dev->dma_parms;
of_dma_configure(&dev->dev);
if (of_device_add(dev) != 0) {
@@ -295,6 +298,7 @@ static struct amba_device *of_amba_device_create(struct device_node *node,
dev->dev.of_node = of_node_get(node);
dev->dev.parent = parent;
dev->dev.platform_data = platform_data;
+ dev->dev.dma_parms = &dev->dma_parms;
if (bus_id)
dev_set_name(&dev->dev, "%s", bus_id);
else
@@ -32,6 +32,7 @@ struct amba_device {
struct clk *pclk;
unsigned int periphid;
unsigned int irq[AMBA_NR_IRQS];
+ struct device_dma_parameters dma_parms;
};
struct amba_driver {
@@ -27,6 +27,8 @@ struct platform_device {
u32 num_resources;
struct resource *resource;
+ struct device_dma_parameters dma_parms;
+
const struct platform_device_id *id_entry;
char *driver_override; /* Driver name to force a match */
of_dma_configure determines the size of the DMA range for a device by either parsing the dma-ranges property or inspecting the coherent DMA mask. This same information can be used to initialise the max segment size and boundary_mask to a default value. Signed-off-by: Will Deacon <will.deacon@arm.com> --- drivers/of/platform.c | 4 ++++ include/linux/amba/bus.h | 1 + include/linux/platform_device.h | 2 ++ 3 files changed, 7 insertions(+)