[PATCH 1/4] dt-bindings: sound: fsl,imx-asrc: update port binding to support multiple pairs
From: <hidden>
Date: 2026-07-20 09:51:19
Also in:
imx, linux-arm-kernel, linux-devicetree, linux-sound, lkml
Subsystem:
open firmware and flattened device tree bindings, sound - soc layer / dynamic audio power management (asoc), the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Liam Girdwood, Mark Brown, Linus Torvalds
From: Shengjiu Wang <redacted> The i.MX ASRC hardware supports up to three conversion pairs (A, B, C). The existing binding exposed only a single generic audio-graph port, which cannot represent the individual pair endpoints. Add a ports container that enumerates three named sub-ports: port@0 -- pair A port@1 -- pair B port@2 -- pair C Each sub-port references audio-graph-port.yaml as before. For backwards compatibility, keep the old single port property but mark it deprecated. A schema constraint (not: required: [port, ports]) ensures that both forms cannot be used at the same time. Update the examples to show both the new ports form and the deprecated port form. No existing upstream DTS file for fsl,imx-asrc uses the previously documented single 'port' node, so this change does not break any in-tree device tree. Signed-off-by: Shengjiu Wang <redacted> --- .../bindings/sound/fsl,imx-asrc.yaml | 78 +++++++++++++++++++ 1 file changed, 78 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml b/Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml
index 608defc93c1e..18d252722aa8 100644
--- a/Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml
+++ b/Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml@@ -78,9 +78,29 @@ properties: power-domains: maxItems: 1 + ports: + $ref: /schemas/graph.yaml#/properties/ports + properties: + port@0: + $ref: audio-graph-port.yaml# + unevaluatedProperties: false + description: port for pair A + + port@1: + $ref: audio-graph-port.yaml# + unevaluatedProperties: false + description: port for pair B + + port@2: + $ref: audio-graph-port.yaml# + unevaluatedProperties: false + description: port for pair C + port: $ref: audio-graph-port.yaml# unevaluatedProperties: false + deprecated: true + description: deprecated, use ports instead fsl,asrc-rate: $ref: /schemas/types.yaml#/definitions/uint32
@@ -125,6 +145,10 @@ required: - fsl,asrc-width allOf: + - not: + required: + - port + - ports - $ref: dai-common.yaml# - if: properties:
@@ -188,3 +212,57 @@ examples: }; }; }; + + - | + #include <dt-bindings/interrupt-controller/irq.h> + #include <dt-bindings/clock/imx6qdl-clock.h> + asrc1: asrc@2034000 { + compatible = "fsl,imx53-asrc"; + reg = <0x02034000 0x4000>; + interrupts = <0 50 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&clks IMX6QDL_CLK_ASRC_IPG>, + <&clks IMX6QDL_CLK_ASRC_MEM>, <&clks 0>, + <&clks 0>, <&clks 0>, <&clks 0>, <&clks 0>, + <&clks 0>, <&clks 0>, <&clks 0>, <&clks 0>, + <&clks 0>, <&clks 0>, <&clks 0>, <&clks 0>, + <&clks IMX6QDL_CLK_ASRC>, <&clks 0>, <&clks 0>, + <&clks IMX6QDL_CLK_SPBA>; + clock-names = "mem", "ipg", "asrck_0", + "asrck_1", "asrck_2", "asrck_3", "asrck_4", + "asrck_5", "asrck_6", "asrck_7", "asrck_8", + "asrck_9", "asrck_a", "asrck_b", "asrck_c", + "asrck_d", "asrck_e", "asrck_f", "spba"; + dmas = <&sdma 17 23 1>, <&sdma 18 23 1>, <&sdma 19 23 1>, + <&sdma 20 23 1>, <&sdma 21 23 1>, <&sdma 22 23 1>; + dma-names = "rxa", "rxb", "rxc", + "txa", "txb", "txc"; + fsl,asrc-rate = <48000>; + fsl,asrc-width = <16>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + playback-only; + asrc1_endpoint0: endpoint { + remote-endpoint = <&fe00_ep>; + }; + }; + + port@1 { + reg = <1>; + capture-only; + asrc1_endpoint1: endpoint { + }; + }; + + port@2 { + reg = <2>; + capture-only; + asrc1_endpoint2: endpoint { + }; + }; + }; + };
--
2.34.1