ASoC: ASRC support on Tegra186 and later

Merge series from Sameer Pujar <spujar@nvidia.com>:

This series adds support for Asynchronous Sample Rate Converter (ASRC)
module on Tegra186 and later generations of SoCs. ASRC is a client of
AHUB. The driver and DT support is added to make it work with Tegra
audio graph card. The module can be plugged into audio path using ALSA
mixer controls.

ASRC supports two modes of operation, where it gets the ratio info
from SW and ratio detector module. Presently the support is added for
SW mode.

2 files changed, 85 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra186-asrc.yaml b/Documentation/devicetree/bindings/sound/nvidia,tegra186-asrc.yaml
new file mode 100644
index 000000000000..520d0d063d1a
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/nvidia,tegra186-asrc.yaml
@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/nvidia,tegra186-asrc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Tegra186 ASRC Device Tree Bindings
+
+description: |
+  Asynchronous Sample Rate Converter (ASRC) converts the sampling frequency
+  of the input signal from one frequency to another. It can handle over a
+  wide range of sample rate ratios (freq_in/freq_out) from 1:24 to 24:1.
+  ASRC has two modes of operation. One where ratio can be programmed in SW
+  and the other where it gets the information from ratio estimator module.
+
+  It supports  sample rate conversions in the range of 8 to 192 kHz and
+  supports 6 streams upto 12 total channels. The input data size can be
+  16, 24 and 32 bits.
+
+maintainers:
+  - Jon Hunter <jonathanh@nvidia.com>
+  - Mohan Kumar <mkumard@nvidia.com>
+  - Sameer Pujar <spujar@nvidia.com>
+
+allOf:
+  - $ref: name-prefix.yaml#
+
+properties:
+  $nodename:
+    pattern: "^asrc@[0-9a-f]*$"
+
+  compatible:
+    oneOf:
+      - const: nvidia,tegra186-asrc
+      - items:
+          - enum:
+              - nvidia,tegra234-asrc
+              - nvidia,tegra194-asrc
+          - const: nvidia,tegra186-asrc
+
+  reg:
+    maxItems: 1
+
+  sound-name-prefix:
+    pattern: "^ASRC[1-9]$"
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+    description: |
+      ASRC has seven input ports and six output ports. Accordingly ACIF
+      (Audio Client Interfaces) port nodes are defined to represent the
+      ASRC inputs (port 0 to 6) and outputs (port 7 to 12). These are
+      connected to corresponding ports on AHUB (Audio Hub). Additional
+      input (port 6) is for receiving ratio information from estimator.
+
+    patternProperties:
+      '^port@[0-6]':
+        $ref: audio-graph-port.yaml#
+        unevaluatedProperties: false
+        description: ASRC ACIF input ports
+      '^port@[7-9]|1[1-2]':
+        $ref: audio-graph-port.yaml#
+        unevaluatedProperties: false
+        description: ASRC ACIF output ports
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+
+    asrc@2910000 {
+        compatible = "nvidia,tegra186-asrc";
+        reg = <0x2910000 0x2000>;
+        sound-name-prefix = "ASRC1";
+    };
+
+...
diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml b/Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml
index 4727f1e42c53..6df6f858038c 100644
--- a/Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml
+++ b/Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml
@@ -106,6 +106,10 @@ patternProperties:
     type: object
     $ref: nvidia,tegra210-mixer.yaml#
 
+  '^asrc@[0-9a-f]+$':
+    type: object
+    $ref: nvidia,tegra186-asrc.yaml#
+
 required:
   - compatible
   - reg