[PATCH v4 1/2] ASoC: dt-bindings: airoha: Add AN7581 PCM controller

[Christian Marangi <ansuelsmth@gmail.com>]

The Airoha AN7581 SoC provides a PCM interface for VoIP applications,
supporting playback and capture at sample rates of 8 kHz and 16 kHz.
The driver configures the PCM bit clock to 2.048 MHz and supports
8-bit and 16-bit samples, with up to 32 channels.

Document the related compatible and required interrupt/reset and provide an
example for it.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
---
 .../bindings/sound/airoha,an7581-pcm.yaml     | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/airoha,an7581-pcm.yaml

diff --git a/Documentation/devicetree/bindings/sound/airoha,an7581-pcm.yaml b/Documentation/devicetree/bindings/sound/airoha,an7581-pcm.yaml
new file mode 100644
index 000000000000..e73236453b88
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/airoha,an7581-pcm.yaml
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/airoha,an7581-pcm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha PCM controller for AN7581 SoC
+
+maintainers:
+  - Christian Marangi <ansuelsmth@gmail.com>
+
+properties:
+  compatible:
+    const: airoha,an7581-pcm
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: pcm1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - resets
+  - reset-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/reset/airoha,en7581-reset.h>
+
+    pcm@1fbd0000 {
+        compatible = "airoha,an7581-pcm";
+        reg = <0x1fbd0000 0x10000>;
+
+        interrupts = <GIC_SPI 27 IRQ_TYPE_LEVEL_HIGH>;
+        resets = <&scuclk EN7581_PCM1_RST>;
+        reset-names = "pcm1";
+    };
+
+...
-- 
2.55.0