From 2e7d74214d03b40e4ca123b834f189b08e40a6b7 Mon Sep 17 00:00:00 2001 From: Serge Semin Date: Thu, 23 Jul 2020 03:58:40 +0300 Subject: [PATCH] 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 Reviewed-by: Rob Herring Acked-by: Viresh Kumar Link: https://lore.kernel.org/r/20200723005848.31907-3-Sergey.Semin@baikalelectronics.ru Signed-off-by: Vinod Koul --- .../devicetree/bindings/dma/snps,dma-spear1340.yaml | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml b/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml index e761184..20870f5 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: | -- 2.7.4