ASoC: dt-bindings: lpc32xx: Add lpc32xx i2s DT binding

Add nxp,lpc3220-i2s DT binding documentation.

Signed-off-by: Piotr Wojtaszczyk <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/sound/nxp,lpc3220-i2s.yaml

···
+# 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 <[e-mail]>
+  - Piotr Wojtaszczyk <[e-mail]>
+
+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.
+
+  dmas:
+    items:
+      - description: RX DMA Channel
+      - description: TX DMA Channel
+
+  dma-names:
+    items:
+      - const: rx
+      - const: tx
+
+  "#sound-dai-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - dmas
+  - dma-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>;
+      dmas = <&dma 0 1>, <&dma 13 1>;
+      dma-names = "rx", "tx";
+      #sound-dai-cells = <0>;
+    };
+
+...

MAINTAINERS

···
 F:	sound/soc/fsl/fsl*
 F:	sound/soc/fsl/imx*
 
+FREESCALE SOC LPC32XX SOUND DRIVERS
+M:	J.M.B. Downing <[e-mail]>
+M:	Piotr Wojtaszczyk <[e-mail]>
+R:	Vladimir Zapolskiy <[e-mail]>
+L:	[e-mail] (moderated for non-subscribers)
+L:	[e-mail]
+S:	Maintained
+F:	Documentation/devicetree/bindings/sound/nxp,lpc3220-i2s.yaml
+
 FREESCALE SOC SOUND QMC DRIVER
 M:	Herve Codina <[e-mail]>
 L:	[e-mail] (moderated for non-subscribers)