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| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2019-10-25 10:30:55 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2019-11-05 20:00:28 +0300 |
| commit | 115b60a93ee4e29e103c4bf067aeab45c6d51725 (patch) | |
| tree | 14a177bf2248833de564ab9e213be1fc1a53e01a /Documentation/devicetree/bindings/dma | |
| parent | 4868d87c18aa47ed155f48167387a3b716b461d1 (diff) | |
| download | linux-115b60a93ee4e29e103c4bf067aeab45c6d51725.tar.xz | |
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>
Diffstat (limited to 'Documentation/devicetree/bindings/dma')
| -rw-r--r-- | Documentation/devicetree/bindings/dma/ti-edma.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/dma/ti-edma.txt b/Documentation/devicetree/bindings/dma/ti-edma.txt index 4bbc94d829c8..0e1398f93aa2 100644 --- a/Documentation/devicetree/bindings/dma/ti-edma.txt +++ b/Documentation/devicetree/bindings/dma/ti-edma.txt @@ -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 { |