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dt-bindings: dma: ti-edma: Document dma-channel-mask for EDMA 

Similarly to paRAM slots, channels can be used by other cores.

The common dma-channel-mask property can be used for specifying the
available channels.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20191025073056.25450-3-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Peter Ujfalusi 2019-10-25 10:30:55 +03:00 committed by Vinod Koul
parent 4868d87c18
commit 115b60a93e
1 changed files with 8 additions and 0 deletions
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Documentation/devicetree/bindings/dma/ti-edma.txt
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@ -42,6 +42,11 @@ Optional properties:
- ti,edma-reserved-slot-ranges: PaRAM slot ranges which should not be used by
the driver, they are allocated to be used by for example the
DSP. See example.
- dma-channel-mask: Mask of usable channels.
Single uint32 for EDMA with 32 channels, array of two uint32 for
EDMA with 64 channels. See example and
Documentation/devicetree/bindings/dma/dma-common.yaml
------------------------------------------------------------------------------
eDMA3 Transfer Controller
@ -91,6 +96,9 @@ edma: edma@49000000 {
ti,edma-memcpy-channels = <20 21>;
/* The following PaRAM slots are reserved: 35-44 and 100-109 */
ti,edma-reserved-slot-ranges = <35 10>, <100 10>;
/* The following channels are reserved: 35-44 */
dma-channel-mask = <0xffffffff /* Channel 0-31 */
0xffffe007>; /* Channel 32-63 */
};
edma_tptc0: tptc@49800000 {