Re: [PATCH v2 2/3] dt-bindings: dma: ti-edma: Document dma-channel-mask for EDMA
From: Rob Herring <robh@kernel.org>
Date: 2019-09-18 13:29:34
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dmaengine, lkml
On Tue, Sep 10, 2019 at 02:45:58PM +0300, Peter Ujfalusi wrote:
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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 <redacted> --- Documentation/devicetree/bindings/dma/ti-edma.txt | 6 ++++++ 1 file changed, 6 insertions(+)diff --git a/Documentation/devicetree/bindings/dma/ti-edma.txt b/Documentation/devicetree/bindings/dma/ti-edma.txt index 4bbc94d829c8..3c7736246354 100644 --- a/Documentation/devicetree/bindings/dma/ti-edma.txt +++ b/Documentation/devicetree/bindings/dma/ti-edma.txt@@ -42,6 +42,9 @@ 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, see + Documentation/devicetree/bindings/dma/dma-common.yaml +
What's the size? 2 cells?
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------------------------------------------------------------------------------ eDMA3 Transfer Controller@@ -91,6 +94,9 @@ 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 {-- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki