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

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Message-Id: <20211124220057.15763-2-digetx@gmail.com>
Date:   Thu, 25 Nov 2021 01:00:38 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Mark Brown <broonie@...nel.org>, Takashi Iwai <tiwai@...e.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Liam Girdwood <lgirdwood@...il.com>,
        Agneli <poczt@...tonmail.ch>, Rob Herring <robh+dt@...nel.org>
Cc:     linux-tegra@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: [PATCH v1 01/20] ASoC: dt-bindings: Add binding for Tegra20 S/PDIF

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

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

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 <treding@...dia.com>
+  - Jon Hunter <jonathanh@...dia.com>
+
+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@...02400 {
+        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>;
+    };
+
+...
-- 
2.33.1