linux-kernel - [PATCH v2 5/7] dt-bindings: sound: Add support for the Lantiq PEF2256 codec

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Message-Id: <20230316122741.577663-6-herve.codina@bootlin.com>
Date:   Thu, 16 Mar 2023 13:27:39 +0100
From:   Herve Codina <herve.codina@...tlin.com>
To:     Herve Codina <herve.codina@...tlin.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Derek Kiernan <derek.kiernan@...inx.com>,
        Dragan Cvetic <dragan.cvetic@...inx.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        alsa-devel@...a-project.org,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: [PATCH v2 5/7] dt-bindings: sound: Add support for the Lantiq PEF2256 codec

The Lantiq PEF2256, also known as Infineon PEF2256 or FALC256, is a
framer and line interface component designed to fulfill all required
interfacing between an analog E1/T1/J1 line and the digital PCM system
highway/H.100 bus.

The codec support allows to use some of the PCM system highway
time-slots as audio channels to transport audio data over the E1/T1/J1
lines.

Signed-off-by: Herve Codina <herve.codina@...tlin.com>
---
 .../bindings/sound/lantiq,pef2256-codec.yaml  | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/lantiq,pef2256-codec.yaml

diff --git a/Documentation/devicetree/bindings/sound/lantiq,pef2256-codec.yaml b/Documentation/devicetree/bindings/sound/lantiq,pef2256-codec.yaml
new file mode 100644
index 000000000000..acba3a0ccd1b
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/lantiq,pef2256-codec.yaml
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/lantiq,pef2256-codec.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Lantiq PEF2256 codec device
+
+maintainers:
+  - Herve Codina <herve.codina@...tlin.com>
+
+description: |
+  Codec support for PEF2256.
+
+  The Lantiq PEF2256, also known as Infineon PEF2256 or FALC256, is a framer and
+  line interface component designed to fulfill all required interfacing between
+  an analog E1/T1/J1 line and the digital PCM system highway/H.100 bus.
+
+  The codec support allows to use some of the PCM system highway time-slots as
+  audio channels to transport audio data over the E1/T1/J1 lines.
+
+  The time-slots used by the codec must be set and so, the properties
+  'dai-tdm-slot-num', 'dai-tdm-slot-width', 'dai-tdm-slot-tx-mask' and
+  'dai-tdm-slot-rx-mask' must be present in the ALSA sound card node for
+  sub-nodes that involve the codec. The codec uses 8bit time-slots.
+  'dai-tdm-tdm-slot-with' must be set to 8.
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    const: lantiq,pef2256-codec
+
+  lantiq,pef2256:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle to the PEF2256
+
+  '#sound-dai-cells':
+    const: 0
+
+required:
+  - compatible
+  - lantiq,pef2256
+  - '#sound-dai-cells'
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    audio-codec {
+        compatible = "lantiq,pef2256-codec";
+        lantiq,pef2256 = <&pef2256>;
+        #sound-dai-cells = <0>;
+    };
-- 
2.39.2