[PATCH v3 3/4] ASoC: dt-bindings: fsl_easrc: Add document for EASRC

[Shengjiu Wang <shengjiu.wang@nxp.com>]

EASRC (Enhanced Asynchronous Sample Rate Converter) is a new
IP module found on i.MX8MN.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 .../devicetree/bindings/sound/fsl,easrc.yaml  | 96 +++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/fsl,easrc.yaml

diff --git a/Documentation/devicetree/bindings/sound/fsl,easrc.yaml b/Documentation/devicetree/bindings/sound/fsl,easrc.yaml
new file mode 100644
index 000000000000..0131da6e6677
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/fsl,easrc.yaml
@@ -0,0 +1,96 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/fsl,easrc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP Asynchronous Sample Rate Converter (ASRC) Controller
+
+maintainers:
+  - Shengjiu Wang <shengjiu.wang@nxp.com>
+
+properties:
+  $nodename:
+    pattern: "^easrc@.*"
+
+  compatible:
+    oneOf:
+      - items:
+        - enum:
+          - fsl,imx8mn-easrc
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Peripheral clock
+
+  clock-names:
+    items:
+      - const: mem
+
+  dmas:
+    maxItems: 8
+
+  dma-names:
+    oneOf:
+      - items:
+          - const: ctx0_rx
+          - const: ctx0_tx
+          - const: ctx1_rx
+          - const: ctx1_tx
+          - const: ctx2_rx
+          - const: ctx2_tx
+          - const: ctx3_rx
+          - const: ctx3_tx
+
+  fsl,easrc-ram-script-name:
+    $ref: /schemas/types.yaml#/definitions/string
+    description: The coefficient table for the filters
+
+  fsl,asrc-rate:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Defines a mutual sample rate used by DPCM Back Ends
+
+  fsl,asrc-width:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Defines a mutual sample width used by DPCM Back Ends
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - dmas
+  - dma-name
+  - fsl,easrc-ram-script-name
+  - fsl,asrc-rate
+  - fsl,asrc-width
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx8mn-clock.h>
+
+    easrc: easrc@300C0000 {
+           compatible = "fsl,imx8mn-easrc";
+           reg = <0x0 0x300C0000 0x0 0x10000>;
+           interrupts = <0x0 122 0x4>;
+           clocks = <&clk IMX8MN_CLK_ASRC_ROOT>;
+           clock-names = "mem";
+           dmas = <&sdma2 16 23 0> , <&sdma2 17 23 0>,
+                  <&sdma2 18 23 0> , <&sdma2 19 23 0>,
+                  <&sdma2 20 23 0> , <&sdma2 21 23 0>,
+                  <&sdma2 22 23 0> , <&sdma2 23 23 0>;
+           dma-names = "ctx0_rx", "ctx0_tx",
+                       "ctx1_rx", "ctx1_tx",
+                       "ctx2_rx", "ctx2_tx",
+                       "ctx3_rx", "ctx3_tx";
+           fsl,easrc-ram-script-name = "imx/easrc/easrc-imx8mn.bin";
+           fsl,asrc-rate  = <8000>;
+           fsl,asrc-width = <16>;
+           status = "disabled";
+    };
-- 
2.21.0