[PATCH 02/54] ASoC: dt-bindings: Convert Bluetooth SCO Link binding to a schema

[Maxime Ripard]

Bluetooth SCO Link are supported by Linux with a matching device tree
binding.

Now that we have the DT validation in place, let's convert the device
tree bindings for that driver over to a YAML schema.

The value expected for #sound-dai-cells wasn't documented though, and
the users were inconsistent. The example didn't list it, and across the
4 users we have in tree:
  - 1 had a cells value of 1, but using only 0 as argument
  - 1 had a cells value of 0,
  - 2 didn't have this property at all, behaving as if it was 0,

It seems like the consensus seems to be that it should be 0, so let's
enforce it.

Cc: alsa-devel at alsa-project.org
Cc: devicetree at vger.kernel.org
Cc: Liam Girdwood <lgirdwood at gmail.com>
Cc: Mark Brown <broonie at kernel.org>
Cc: Samuel Holland <samuel at sholland.org>
Signed-off-by: Maxime Ripard <maxime at cerno.tech>
---
 .../devicetree/bindings/sound/bt-sco.txt      | 13 -------
 .../bindings/sound/linux,bt-sco.yaml          | 34 +++++++++++++++++++
 2 files changed, 34 insertions(+), 13 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/sound/bt-sco.txt
 create mode 100644 Documentation/devicetree/bindings/sound/linux,bt-sco.yaml

diff --git a/Documentation/devicetree/bindings/sound/bt-sco.txt b/Documentation/devicetree/bindings/sound/bt-sco.txt
deleted file mode 100644
index 641edf75e184..000000000000
--- a/Documentation/devicetree/bindings/sound/bt-sco.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-Bluetooth-SCO audio CODEC
-
-This device support generic Bluetooth SCO link.
-
-Required properties:
-
-  - compatible : "delta,dfbmcs320" or "linux,bt-sco"
-
-Example:
-
-codec: bt_sco {
-	compatible = "delta,dfbmcs320";
-};
diff --git a/Documentation/devicetree/bindings/sound/linux,bt-sco.yaml b/Documentation/devicetree/bindings/sound/linux,bt-sco.yaml
new file mode 100644
index 000000000000..334b508205cd
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/linux,bt-sco.yaml
@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/linux,bt-sco.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Bluetooth SCO Audio Codec Device Tree Bindings
+
+maintainers:
+  - Mark Brown <broonie at kernel.org>
+
+properties:
+  '#sound-dai-cells':
+    const: 0
+
+  compatible:
+    enum:
+      - delta,dfbmcs320
+      - linux,bt-sco
+
+required:
+  - '#sound-dai-cells'
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    codec {
+        #sound-dai-cells = <0>;
+        compatible = "linux,bt-sco";
+    };
+
+...
-- 
2.31.1