[v1,01/20] ASoC: dt-bindings: Add binding for Tegra20 S/PDIF

Commit Message

Dmitry Osipenko Nov. 24, 2021, 10 p.m. UTC

Add device-tree binding for Tegra20 S/PDIF controller.

Signed-off-by: Dmitry Osipenko <[e-mail]>
---
 .../bindings/sound/nvidia,tegra20-spdif.yaml  | 88 +++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra20-spdif.yaml

Patch

diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra20-spdif.yaml b/Documentation/devicetree/bindings/sound/nvidia,tegra20-spdif.yaml
new file mode 100644
index 000000000000..4a2747d64772
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/nvidia,tegra20-spdif.yaml
@@ -0,0 +1,88 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/nvidia,tegra20-spdif.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NVIDIA Tegra20 S/PDIF Controller
+
+description: |
+  The S/PDIF controller supports both input and output in serial audio
+  digital interface format. The input controller can digitally recover
+  a clock from the received stream. The S/PDIF controller is also used
+  to generate the embedded audio for HDMI output channel.
+
+maintainers:
+  - Thierry Reding <[e-mail]>
+  - Jon Hunter <[e-mail]>
+
+properties:
+  compatible:
+    const: nvidia,tegra20-spdif
+
+  reg:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 2
+
+  clock-names:
+    items:
+      - const: spdif_out
+      - const: spdif_in
+
+  dmas:
+    minItems: 2
+
+  dma-names:
+    items:
+      - const: rx
+      - const: tx
+
+  "#sound-dai-cells":
+    const: 0
+
+  nvidia,fixed-parent-rate:
+    description: |
+      Specifies whether board prefers parent clock to stay at a fixed rate.
+      This allows multiple Tegra20 audio components work simultaneously by
+      limiting number of supportable audio rates.
+    type: boolean
+
+  assigned-clocks: true
+  assigned-clock-parents: true
+
+required:
+  - compatible
+  - reg
+  - resets
+  - interrupts
+  - clocks
+  - clock-names
+  - dmas
+  - dma-names
+  - "#sound-dai-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    spdif@70002400 {
+        compatible = "nvidia,tegra20-spdif";
+        reg = <0x70002400 0x200>;
+        interrupts = <77>;
+        clocks = <&tegra_car99>, <&tegra_car 98>;
+        clock-names = "spdif_out", "spdif_in";
+        resets = <&tegra_car 10>;
+        dmas = <&apbdma 3>, <&apbdma 3>;
+        dma-names = "rx", "tx";
+        #sound-dai-cells = <0>;
+    };
+
+...