Messages in this thread Patch in this message | | | From | Serge Semin <> | Subject | [PATCH v2 2/6] dt-bindings: dma: dw: Add max burst transaction length property | Date | Fri, 8 May 2020 13:53:00 +0300 |
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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> Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Paul Burton <paulburton@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Viresh Kumar <vireshk@kernel.org> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: linux-mips@vger.kernel.org
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Changelog v2: - Rearrange SoBs. - Move $ref to the root level of the properties. So do with the constraints. - Set default max-burst-len to 256 TR-WIDTH words. --- .../devicetree/bindings/dma/snps,dma-spear1340.yaml | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml b/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml index e7611840a7cf..7df4f9ad418a 100644 --- a/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml +++ b/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml @@ -120,6 +120,18 @@ properties: enum: [0, 1] default: 1 + snps,max-burst-len: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: | + Maximum length of burst transactions supported by hardware. + It's an array property with one cell per channel in units of + CTLx register SRC_TR_WIDTH/DST_TR_WIDTH (data-width) field. + 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: | -- 2.25.1
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