linux-kernel - [PATCH 2/2] doc: dts: Add device tree information regarding wm8940 codec

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Date:   Mon,  9 May 2022 14:13:13 +0200
From:   Lukasz Majewski <lukma@...x.de>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     linux-kernel@...r.kernel.org, patches@...nsource.cirrus.com,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, alsa-devel@...a-project.org,
        Lukasz Majewski <lukma@...x.de>
Subject: [PATCH 2/2] doc: dts: Add device tree information regarding wm8940 codec

This commit provides documentation entry for wm8940 codec.

Signed-off-by: Lukasz Majewski <lukma@...x.de>
---
 .../devicetree/bindings/sound/wlf,wm8940.yaml | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/wlf,wm8940.yaml

diff --git a/Documentation/devicetree/bindings/sound/wlf,wm8940.yaml b/Documentation/devicetree/bindings/sound/wlf,wm8940.yaml
new file mode 100644
index 000000000000..8aadcbeed502
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/wlf,wm8940.yaml
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/wlf,wm8940.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Wolfson WM8940 Codec Device Tree Bindings
+
+maintainers:
+  - patches@...nsource.cirrus.com
+
+properties:
+  '#sound-dai-cells':
+    const: 0
+
+  compatible:
+    const: wlf,wm8940
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 526000
+
+required:
+  - '#sound-dai-cells'
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        codec@0 {
+            #sound-dai-cells = <0>;
+            compatible = "wlf,wm8940";
+            reg = <0>;
+            spi-max-frequency = <500000>;
+        };
+    };
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        codec@1a {
+            #sound-dai-cells = <0>;
+            compatible = "wlf,wm8940";
+            reg = <0x1a>;
+        };
+    };
+
+...
-- 
2.35.1