[PATCH v3 1/4] ASoC: dt-bindings: lpc32xx: Add lpc32xx i2s DT binding

[Piotr Wojtaszczyk <piotr.wojtaszczyk@xxxxxxxxxxx>]

Add nxp,lpc3220-i2s DT binding documentation.

Signed-off-by: Piotr Wojtaszczyk <piotr.wojtaszczyk@xxxxxxxxxxx>
---
Changes for v3:
- Added '$ref: dai-common.yaml#' and '#sound-dai-cells'
- Dropped all clock-names, references
- Dropped status property from the example
- Added interrupts property
- 'make dt_binding_check' pass

Changes for v2:
- Added maintainers field
- Dropped clock-names
- Dropped unused unneded interrupts field

 .../bindings/sound/nxp,lpc3220-i2s.yaml       | 69 +++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/nxp,lpc3220-i2s.yaml

diff --git a/Documentation/devicetree/bindings/sound/nxp,lpc3220-i2s.yaml b/Documentation/devicetree/bindings/sound/nxp,lpc3220-i2s.yaml
new file mode 100644
index 000000000000..04a1090f70cc
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/nxp,lpc3220-i2s.yaml
@@ -0,0 +1,69 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/nxp,lpc3220-i2s.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP LPC32XX I2S Controller
+
+description:
+  The I2S controller in LPC32XX SoCs, ASoC DAI.
+
+maintainers:
+  - J.M.B. Downing <jonathan.downing@xxxxxxxxxx>
+  - Piotr Wojtaszczyk <piotr.wojtaszczyk@xxxxxxxxxxx>
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - nxp,lpc3220-i2s
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: input clock of the peripheral.
+
+  dma-vc-names:
+    $ref: /schemas/types.yaml#/definitions/string-array
+    description: |
+      names of virtual pl08x dma channels for tx and rx
+      directions in this order.
+    minItems: 2
+    maxItems: 2
+
+  "#sound-dai-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - dma-vc-names
+  - '#sound-dai-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/lpc32xx-clock.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2s@20094000 {
+      compatible = "nxp,lpc3220-i2s";
+      reg = <0x20094000 0x1000>;
+      interrupts = <22 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&clk LPC32XX_CLK_I2S0>;
+      dma-vc-names = "i2s0-tx", "i2s0-rx";
+      #sound-dai-cells = <0>;
+    };
+
+...
-- 
2.25.1