linux-kernel - [PATCH v1 1/2] dt-bindings: ASoC: Add Cadence I2S controller for StarFive JH8100 SoC

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Date: Thu, 21 Dec 2023 11:32:22 +0800
From: Xingyu Wu <xingyu.wu@...rfivetech.com>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
	Claudiu Beznea <Claudiu.Beznea@...rochip.com>, Jaroslav Kysela
	<perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, Rob Herring
	<robh+dt@...nel.org>, Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>, Conor Dooley
	<conor.dooley@...rochip.com>
CC: Walker Chen <walker.chen@...rfivetech.com>, Xingyu Wu
	<xingyu.wu@...rfivetech.com>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <alsa-devel@...a-project.org>,
	<linux-sound@...r.kernel.org>
Subject: [PATCH v1 1/2] dt-bindings: ASoC: Add Cadence I2S controller for StarFive JH8100 SoC

Add bindings for the Multi-Channel I2S controller of Cadence
on the StarFive JH8100 SoC.

Signed-off-by: Xingyu Wu <xingyu.wu@...rfivetech.com>
---
 .../bindings/sound/cdns,jh8100-i2s.yaml       | 100 ++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/cdns,jh8100-i2s.yaml

diff --git a/Documentation/devicetree/bindings/sound/cdns,jh8100-i2s.yaml b/Documentation/devicetree/bindings/sound/cdns,jh8100-i2s.yaml
new file mode 100644
index 000000000000..5d95d9ab3e45
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/cdns,jh8100-i2s.yaml
@@ -0,0 +1,100 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/cdns,jh8100-i2s.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cadence multi-channel I2S controller for StarFive JH8100 SoC
+
+description: |
+  The Cadence I2S Controller implements a function of the multi-channel
+  (up to 8-channel) bus. It combines functions of a transmitter and a receiver.
+  It is used in the StarFive JH8100 SoC.
+
+maintainers:
+  - Xingyu Wu <xingyu.wu@...rfivetech.com>
+  - Walker Chen <walker.chen@...rfivetech.com>
+
+properties:
+  compatible:
+    const: starfive,jh8100-i2s
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    description: |
+      The interrupt line number for the I2S controller. Add this
+      parameter if the I2S controller that you are using does not
+      support DMA.
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Bit clock
+      - description: Main ICG clock
+      - description: Inner master clock
+
+  clock-names:
+    items:
+      - const: bclk
+      - const: icg
+      - const: mclk_inner
+
+  resets:
+    maxItems: 1
+
+  dmas:
+    items:
+      - description: TX DMA Channel
+      - description: RX DMA Channel
+    minItems: 1
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+    minItems: 1
+
+  cdns,i2s-max-channels:
+    description: |
+      Number of I2S max stereo channels supported by the hardware.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1
+    maximum: 8
+
+  "#sound-dai-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - resets
+
+oneOf:
+  - required:
+      - dmas
+      - dma-names
+  - required:
+      - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2s@...b0000 {
+      compatible = "starfive,jh8100-i2s";
+      reg = <0x122b0000 0x1000>;
+      clocks = <&syscrg_ne 133>,
+               <&syscrg_ne 170>,
+               <&syscrg 50>;
+      clock-names = "bclk", "icg",
+                    "mclk_inner";
+      resets = <&syscrg_ne 43>;
+      dmas = <&dma 7>, <&dma 6>;
+      dma-names = "tx", "rx";
+      cdns,i2s-max-channels = <2>;
+      #sound-dai-cells = <0>;
+    };
-- 
2.25.1