@@ -498,6 +498,7 @@
compatible = "fsl,mpc5121-dma";
reg = <0x14000 0x1800>;
interrupts = <65 0x8>;
+ #dma-cells = <1>;
};
};
@@ -53,6 +53,7 @@
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
+#include <linux/of_dma.h>
#include <linux/of_platform.h>
#include <linux/random.h>
@@ -1036,7 +1037,15 @@ static int mpc_dma_probe(struct platform_device *op)
if (retval)
goto err_free2;
- return retval;
+ /* Register with OF helpers for DMA lookups (nonfatal) */
+ if (dev->of_node) {
+ retval = of_dma_controller_register(dev->of_node,
+ of_dma_xlate_by_chan_id, mdma);
+ if (retval)
+ dev_warn(dev, "Could not register for OF lookup\n");
+ }
+
+ return 0;
err_free2:
if (mdma->is_mpc8308)
@@ -1057,6 +1066,8 @@ static int mpc_dma_remove(struct platform_device *op)
struct device *dev = &op->dev;
struct mpc_dma *mdma = dev_get_drvdata(dev);
+ if (dev->of_node)
+ of_dma_controller_free(dev->of_node);
dma_async_device_unregister(&mdma->dma);
if (mdma->is_mpc8308) {
free_irq(mdma->irq2, mdma);
Register the controller for device tree based lookup of DMA channels (non-fatal for backwards compatibility with older device trees) and provide the '#dma-cells' property in the shared mpc5121.dtsi file Signed-off-by: Alexander Popov <a13xp0p0v88@gmail.com> --- arch/powerpc/boot/dts/mpc5121.dtsi | 1 + drivers/dma/mpc512x_dma.c | 13 ++++++++++++- 2 files changed, 13 insertions(+), 1 deletion(-)