dmaengine/dw_dmac: provide a mechanism to indicate private devices

Some platforms (e.g. Picochip PC3XX) have multiple DMA controllers
where some may be used for slave transfers and others for general
purpose memcpy type transfers. Add a .is_private boolean to the
platform data structure so that controllers can be marked as private
so that the DMA_PRIVATE capability will be set for that controller.

Signed-off-by: Jamie Iles <jamie.iles@picochip.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index a4cf2614085a..08dab3badad2 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -1341,6 +1341,8 @@ static int __init dw_probe(struct platform_device *pdev)
 
         dma_cap_set(DMA_MEMCPY, dw->dma.cap_mask);
         dma_cap_set(DMA_SLAVE, dw->dma.cap_mask);
+        if (pdata->is_private)
+                dma_cap_set(DMA_PRIVATE, dw->dma.cap_mask);
         dw->dma.dev = &pdev->dev;
         dw->dma.device_alloc_chan_resources = dwc_alloc_chan_resources;
         dw->dma.device_free_chan_resources = dwc_free_chan_resources;