fsldma: allow Freescale Elo DMA driver to be compiled as a module

Modify the Freescale Elo / Elo Plus DMA driver so that it can be compiled as
a module.

The primary change is to stop treating the DMA controller as a bus, and the
DMA channels as devices on the bus.  This is because the Open Firmware (OF)
kernel code does not allow busses to be removed, so although we can call
of_platform_bus_probe() to probe the DMA channels, there is no
of_platform_bus_remove().  Instead, the DMA channels are manually probed,
similar to what fsl_elbc_nand.c does.

Cc: Scott Wood <scottwood@freescale.com>
Acked-by: Li Yang <leoli@freescale.com>
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/dma/fsldma.h b/drivers/dma/fsldma.h
index 6faf07ba0d0e..4f21a512d848 100644
--- a/drivers/dma/fsldma.h
+++ b/drivers/dma/fsldma.h
@@ -114,6 +114,7 @@ struct fsl_dma_device {
         struct dma_device common;
         struct fsl_dma_chan *chan[FSL_DMA_MAX_CHANS_PER_DEVICE];
         u32 feature;            /* The same as DMA channels */
+        int irq;                /* Channel IRQ */
 };
 
 /* Define macros for fsl_dma_chan->feature property */