linux-kernel - [PATCH] ASoC: dt-bindings: Add dt bindings definition file for imx28 saif

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Message-Id: <20240827180528.2315563-1-lukma@denx.de>
Date: Tue, 27 Aug 2024 20:05:28 +0200
From: Lukasz Majewski <lukma@...x.de>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>
Cc: Fabio Estevam <festevam@...il.com>,
	Conor Dooley <conor+dt@...nel.org>,
	devicetree@...r.kernel.org,
	linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Lukasz Majewski <lukma@...x.de>
Subject: [PATCH] ASoC: dt-bindings: Add dt bindings definition file for imx28 saif

This file allows correct check of DTS node for imx287 based
"fsl,imx28-saif" compatible device.

It corresponds to Documentation/devicetree/bindings/fsl,imx28-saif

Signed-off-by: Lukasz Majewski <lukma@...x.de>
---
 .../devicetree/bindings/sound/fsl,saif.yaml   | 79 +++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/fsl,saif.yaml

diff --git a/Documentation/devicetree/bindings/sound/fsl,saif.yaml b/Documentation/devicetree/bindings/sound/fsl,saif.yaml
new file mode 100644
index 000000000000..747faa411a50
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/fsl,saif.yaml
@@ -0,0 +1,79 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/fsl,saif.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale MXS Serial Audio Interface (SAIF)
+
+maintainers:
+  - Lukasz Majewski <lukma@...x.de>
+
+description: |
+  The SAIF is based on I2S module that is used to communicate with audio codecs,
+  but only with half-duplex manner (i.e. it can either transmit or receive PCM
+  audio).
+
+properties:
+  compatible:
+    const: fsl,imx28-saif
+
+  reg:
+    maxItems: 1
+
+  "#sound-dai-cells":
+    const: 0
+
+  assigned-clock-parents: true
+  assigned-clock-rates: true
+  assigned-clocks: true
+
+  interrupts:
+    maxItems: 1
+
+  dmas:
+    maxItems: 1
+
+  dma-names:
+    const: rx-tx
+
+  clocks:
+    maxItems: 1
+
+  fsl,saif-master:
+    description: Indicate that saif is a slave and its phandle points to master
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - dmas
+  - dma-names
+  - "#sound-dai-cells"
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    saif0: saif@...42000 {
+        #sound-dai-cells = <0>;
+        compatible = "fsl,imx28-saif";
+        reg = <0x80042000 2000>;
+        interrupts = <59>;
+        clocks = <&clks 53>;
+        dmas = <&dma_apbx 4>;
+        dma-names = "rx-tx";
+    };
+  - |
+    saif1: saif@...46000 {
+        #sound-dai-cells = <0>;
+        compatible = "fsl,imx28-saif";
+        reg = <0x80046000 2000>;
+        interrupts = <58>;
+        clocks = <&clks 53>;
+        dmas = <&dma_apbx 5>;
+        dma-names = "rx-tx";
+        fsl,saif-master = <&saif0>;
+    };
-- 
2.39.2