#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/clk.h>
+#include <linux/of_dma.h>
#include <linux/sirfsoc_dma.h>
#include "dmaengine.h"
return 0;
}
+static struct dma_chan *of_dma_sirfsoc_xlate(struct of_phandle_args *dma_spec,
+ struct of_dma *ofdma)
+{
+ struct sirfsoc_dma *sdma = ofdma->of_dma_data;
+ unsigned int request = dma_spec->args[0];
+
+ if (request > SIRFSOC_DMA_CHANNELS)
+ return NULL;
+
+ return dma_get_slave_channel(&sdma->channels[request].chan);
+}
+
static int sirfsoc_dma_probe(struct platform_device *op)
{
struct device_node *dn = op->dev.of_node;
if (ret)
goto free_irq;
+ /* Device-tree DMA controller registration */
+ ret = of_dma_controller_register(dn, of_dma_sirfsoc_xlate, sdma);
+ if (ret) {
+ dev_err(dev, "failed to register DMA controller\n");
+ goto unreg_dma_dev;
+ }
+
pm_runtime_enable(&op->dev);
dev_info(dev, "initialized SIRFSOC DMAC driver\n");
return 0;
+unreg_dma_dev:
+ dma_async_device_unregister(dma);
free_irq:
free_irq(sdma->irq, sdma);
irq_dispose:
struct device *dev = &op->dev;
struct sirfsoc_dma *sdma = dev_get_drvdata(dev);
+ of_dma_controller_free(op->dev.of_node);
dma_async_device_unregister(&sdma->dma);
free_irq(sdma->irq, sdma);
irq_dispose_mapping(sdma->irq);