[PATCH v1 1/2] dt-bindings: ASoC: Add PDM controller for the StarFive JH8100 SoC

[Xingyu Wu <xingyu.wu@starfivetech.com>]

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

Signed-off-by: Xingyu Wu <xingyu.wu@starfivetech.com>
---
 .../bindings/sound/starfive,jh8100-pdm.yaml   | 84 +++++++++++++++++++
 1 file changed, 84 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..a91b47d39ad3
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/starfive,jh8100-pdm.yaml
@@ -0,0 +1,84 @@
+# 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
+  mono/stereo PDM format, 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 modules, each PDM module can drive
+  one bitstream sampling clock and two bitstream coming data with sampling
+  clock rising and falling edge.
+
+maintainers:
+  - Xingyu Wu <xingyu.wu@starfivetech.com>
+  - Walker Chen <walker.chen@starfivetech.com>
+
+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
+
+  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.
+
+  starfive,pdm-modulex:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+    description:
+      The module x will be using in PDM controller. Default use module 0.
+
+  "#sound-dai-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - resets
+  - starfive,syscon
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    pdm@12250000 {
+      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