linux-kernel - [PATCH v2 1/2] ASoC: dt-bindings: Add PDM controller for the StarFive JH8100 SoC

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Message-Id: <20240423083405.263912-2-xingyu.wu@starfivetech.com>
Date: Tue, 23 Apr 2024 16:34:04 +0800
From: Xingyu Wu <xingyu.wu@...rfivetech.com>
To: Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Takashi Iwai <tiwai@...e.com>,
	Jaroslav Kysela <perex@...ex.cz>,
	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 v2 1/2] ASoC: dt-bindings: Add PDM controller for the StarFive JH8100 SoC

Add bindings about the PDM controller for the StarFive JH8100 SoC.

Signed-off-by: Xingyu Wu <xingyu.wu@...rfivetech.com>
---
 .../bindings/sound/starfive,jh8100-pdm.yaml   | 82 +++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/starfive,jh8100-pdm.yaml

diff --git a/Documentation/devicetree/bindings/sound/starfive,jh8100-pdm.yaml b/Documentation/devicetree/bindings/sound/starfive,jh8100-pdm.yaml
new file mode 100644
index 000000000000..50401e177f41
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/starfive,jh8100-pdm.yaml
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/starfive,jh8100-pdm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive JH8100 PDM controller
+
+description: |
+  The Pulse Density Modulation (PDM) controller is a digital PDM out
+  microphone interface controller and decoder that supports both up to 4
+  channels, and an Inter-IC Sound (I2S) transmitter that outputs standard
+  stereo audio data to another device. The I2S transmitter can be
+  configured to operate either a master or a slave (default mode). The PDM
+  controller includes two PDM blocks, each PDM block can drive one
+  bitstream sampling clock and two bitstream coming data (mono/stereo)
+  with sampling clock rising and falling edge.
+
+maintainers:
+  - Xingyu Wu <xingyu.wu@...rfivetech.com>
+  - Walker Chen <walker.chen@...rfivetech.com>
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    const: starfive,jh8100-pdm
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: DMIC output clock
+      - description: Main ICG clock
+
+  clock-names:
+    items:
+      - const: dmic
+      - const: icg
+
+  resets:
+    maxItems: 1
+
+  "#sound-dai-cells":
+    const: 0
+
+  starfive,syscon:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - items:
+          - description: phandle to System Register Controller sys_syscon_ne node.
+          - description: PDM source enabled control offset of SYS_SYSCON_NE register.
+          - description: PDM source enabled control mask
+    description:
+      The phandle to System Register Controller syscon node and the PDM source
+      from I2S enabled control offset and mask of SYS_SYSCON_NE register.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - resets
+  - '#sound-dai-cells'
+  - starfive,syscon
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    pdm@...50000 {
+      compatible = "starfive,jh8100-pdm";
+      reg = <0x12250000 0x1000>;
+      clocks = <&syscrg_ne 142>,
+               <&syscrg_ne 171>;
+      clock-names = "dmic", "icg";
+      resets = <&syscrg_ne 44>;
+      starfive,syscon = <&sys_syscon_ne 0xc 0xff>;
+      #sound-dai-cells = <0>;
+    };
-- 
2.25.1