[PATCH 2/5] dt-bindings: dma: dw: Add max burst transaction length property bindings

[<Sergey.Semin@baikalelectronics.ru>]

From: Serge Semin <Sergey.Semin@baikalelectronics.ru>

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>
Signed-off-by: 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>
---
 .../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 d7f9383ceb8f..308ec6482064 100644
--- a/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml
+++ b/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml
@@ -126,6 +126,18 @@ properties:
           enum: [0, 1]
           default: 0
 
+  snps,max-burst-len:
+    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 field.
+    allOf:
+      - $ref: /schemas/types.yaml#/definitions/uint32-array
+      - maxItems: 8
+        items:
+          enum: [4, 8, 16, 32, 64, 128, 256]
+          default: 0
+
   snps,dma-protection-control:
     description: |
       Bits one-to-one passed to the AHB HPROT[3:1] bus. Each bit setting
-- 
2.25.1