dmaengine: at_hdmac: add device tree support
Add device tree probe support for atmel at_hdmac DMA driver. Bindings are added to specify DMA controller configuration. Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com> Acked-by: NGrant Likely <grant.likely@secretlab.ca> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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