linux-kernel - [PATCH v3 1/3] dt-bindings: dmaengine: dma-common: Change dma-channel-mask to uint32-array

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Date:   Thu, 26 Sep 2019 14:19:52 +0300
From:   Peter Ujfalusi <peter.ujfalusi@...com>
To:     <vkoul@...nel.org>, <robh+dt@...nel.org>
CC:     <dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <dan.j.williams@...el.com>, <devicetree@...r.kernel.org>
Subject: [PATCH v3 1/3] dt-bindings: dmaengine: dma-common: Change dma-channel-mask to uint32-array

Make the dma-channel-mask to be usable for controllers with more than 32
channels.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
---
 Documentation/devicetree/bindings/dma/dma-common.yaml | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/dma/dma-common.yaml b/Documentation/devicetree/bindings/dma/dma-common.yaml
index ed0a49a6f020..4527f20301ff 100644
--- a/Documentation/devicetree/bindings/dma/dma-common.yaml
+++ b/Documentation/devicetree/bindings/dma/dma-common.yaml
@@ -25,11 +25,18 @@ properties:
       Used to provide DMA controller specific information.
 
   dma-channel-mask:
-    $ref: /schemas/types.yaml#definitions/uint32
     description:
       Bitmask of available DMA channels in ascending order that are
       not reserved by firmware and are available to the
       kernel. i.e. first channel corresponds to LSB.
+      The first item in the array is for channels 0-31, the second is for
+      channels 32-63, etc.
+    allOf:
+      - $ref: /schemas/types.yaml#/definitions/uint32-array
+        items:
+          minItems: 1
+          # Should be enough
+          maxItems: 255
 
   dma-channels:
     $ref: /schemas/types.yaml#definitions/uint32
-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
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