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| author | Serge Semin <Sergey.Semin@baikalelectronics.ru> | 2020-07-23 03:58:40 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-07-27 12:00:54 +0300 |
| commit | 2e7d74214d03b40e4ca123b834f189b08e40a6b7 (patch) | |
| tree | eaf5d6bbf92404c9f68bde67e8fad6fcb13a9e47 | |
| parent | be464133cd77c95d13df3369e63255b881d84200 (diff) | |
| download | linux-2e7d74214d03b40e4ca123b834f189b08e40a6b7.tar.xz | |
dt-bindings: dma: dw: Add max burst transaction length property
This array property is used to indicate the maximum burst transaction
length supported by each DMA channel.
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/20200723005848.31907-3-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml b/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml index e7611840a7cf..20870f5c14dd 100644 --- a/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml +++ b/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml @@ -120,6 +120,21 @@ properties: enum: [0, 1] default: 1 + snps,max-burst-len: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: | + Maximum length of the burst transactions supported by the controller. + This property defines the upper limit of the run-time burst setting + (CTLx.SRC_MSIZE/CTLx.DST_MSIZE fields) so the allowed burst length + will be from 1 to max-burst-len words. It's an array property with one + cell per channel in the units determined by the value set in the + CTLx.SRC_TR_WIDTH/CTLx.DST_TR_WIDTH fields (data width). + items: + maxItems: 8 + items: + enum: [4, 8, 16, 32, 64, 128, 256] + default: 256 + snps,dma-protection-control: $ref: /schemas/types.yaml#definitions/uint32 description: | |