[2/2] dt-bindings: dma: adi,axi-dmac: deprecate adi,channels node

Commit Message

David Lechner Oct. 22, 2024, 5:46 p.m. UTC

Deprecate the adi,channels node in the adi,axi-dmac binding. Prior to
IP version 4.3.a, this information was required. Since then, there are
memory-mapped registers that can be read to get the same information.

Signed-off-by: David Lechner <[e-mail]>
---

For context, the adi,channels node has not been required in the Linux
kernel since [1].

[1]: https://lore.kernel.org/all/[e-mail]/
---
 .../devicetree/bindings/dma/adi,axi-dmac.yaml        | 20 +++++---------------
 1 file changed, 5 insertions(+), 15 deletions(-)

Patch

diff --git a/Documentation/devicetree/bindings/dma/adi,axi-dmac.yaml b/Documentation/devicetree/bindings/dma/adi,axi-dmac.yaml
index e457630ec7c0..d5e87fceb3bb 100644
--- a/Documentation/devicetree/bindings/dma/adi,axi-dmac.yaml
+++ b/Documentation/devicetree/bindings/dma/adi,axi-dmac.yaml
@@ -28,8 +28,12 @@  properties:
     const: 1
 
   adi,channels:
+    deprecated: true
     type: object
-    description: This sub-node must contain a sub-node for each DMA channel.
+    description:
+      This sub-node must contain a sub-node for each DMA channel. This node is
+      only required for IP versions older than 4.3.a and should otherwise be
+      omitted.
 
     properties:
       "#size-cells":
@@ -109,7 +113,6 @@  required:
   - interrupts
   - clocks
   - "#dma-cells"
-  - adi,channels
 
 additionalProperties: false
 
@@ -121,17 +124,4 @@  examples:
         interrupts = <0 57 0>;
         clocks = <&clkc 16>;
         #dma-cells = <1>;
-
-        adi,channels {
-            #size-cells = <0>;
-            #address-cells = <1>;
-
-            dma-channel@0 {
-                reg = <0>;
-                adi,source-bus-width = <32>;
-                adi,source-bus-type = <0>; /* AXI_DMAC_TYPE_AXI_MM */
-                adi,destination-bus-width = <64>;
-                adi,destination-bus-type = <2>; /* AXI_DMAC_TYPE_AXI_FIFO */
-            };
-        };
     };