xlnx: dt-bindings: Convert to json-schema

Merge series from Vincenzo Frascino <vincenzo.frascino@arm.com>:

This series converts the folling Xilinx device tree binding documentation:
 - xlnx,i2s
 - xlnx,audio-formatter
 - xlnx,spdif
to json-schema.

Note: These bindings are required for future work on the ARM Morello
Platforms device tree.

Documentation/devicetree/bindings/sound/xlnx,audio-formatter.yaml

@@ -0,0 +1,72 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/xlnx,audio-formatter.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xilinx PL audio formatter
+
+description:
+  The IP core supports DMA, data formatting(AES<->PCM conversion)
+  of audio samples.
+
+maintainers:
+  - Vincenzo Frascino <vincenzo.frascino@arm.com>
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - xlnx,audio-formatter-1.0
+
+  reg:
+    maxItems: 1
+
+  interrupt-names:
+    minItems: 1
+    items:
+      - const: irq_mm2s
+      - const: irq_s2mm
+
+  interrupts:
+    minItems: 1
+    items:
+      - description: interrupt from MM2S block
+      - description: interrupt from S2MM block
+
+  clock-names:
+    minItems: 1
+    items:
+      - const: s_axi_lite_aclk
+      - const: aud_mclk
+
+  clocks:
+    minItems: 1
+    items:
+      - description: clock for the axi data stream
+      - description: clock for the MEMS microphone data stream
+
+required:
+  - compatible
+  - reg
+  - interrupt-names
+  - interrupts
+  - clock-names
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    audio_formatter@80010000 {
+      compatible = "xlnx,audio-formatter-1.0";
+      reg = <0x80010000 0x1000>;
+      interrupt-names = "irq_mm2s", "irq_s2mm";
+      interrupt-parent = <&gic>;
+      interrupts = <0 104 4>, <0 105 4>;
+      clock-names = "s_axi_lite_aclk", "aud_mclk";
+      clocks = <&clk 71>, <&clk_wiz_1 0>;
+    };
+...

Documentation/devicetree/bindings/sound/xlnx,i2s.yaml

@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/xlnx,i2s.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xilinx I2S PL block
+
+description:
+  The IP supports I2S based playback/capture audio.
+
+maintainers:
+  - Vincenzo Frascino <vincenzo.frascino@arm.com>
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - xlnx,i2s-receiver-1.0
+      - xlnx,i2s-transmitter-1.0
+
+  reg:
+    maxItems: 1
+
+  xlnx,dwidth:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum:
+      - 16
+      - 24
+    description: |
+      Sample data width.
+
+  xlnx,num-channels:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1
+    maximum: 4
+    description: |
+      Number of I2S streams.
+
+required:
+  - compatible
+  - reg
+  - xlnx,dwidth
+  - xlnx,num-channels
+
+additionalProperties: false
+
+examples:
+  - |
+    i2s@a0080000 {
+      compatible = "xlnx,i2s-receiver-1.0";
+      reg = <0xa0080000 0x10000>;
+      xlnx,dwidth = <0x18>;
+      xlnx,num-channels = <1>;
+    };
+    i2s@a0090000 {
+      compatible = "xlnx,i2s-transmitter-1.0";
+      reg = <0xa0090000 0x10000>;
+      xlnx,dwidth = <0x18>;
+      xlnx,num-channels = <1>;
+    };
+
+...

Documentation/devicetree/bindings/sound/xlnx,spdif.yaml

@@ -0,0 +1,77 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/xlnx,spdif.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xilinx SPDIF IP
+
+description:
+  The IP supports playback and capture of SPDIF audio.
+
+maintainers:
+  - Vincenzo Frascino <vincenzo.frascino@arm.com>
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - xlnx,spdif-2.0
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: SPDIF audio interrupt
+
+  clock-names:
+    items:
+      - const: aud_clk_i
+      - const: s_axi_aclk
+
+  clocks:
+    minItems: 1
+    items:
+      - description: input audio clock
+      - description: clock for the AXI data stream
+
+  xlnx,spdif-mode:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum:
+      - 0
+      - 1
+    description: |
+      0 - receiver
+      1 - transmitter
+
+  xlnx,aud_clk_i:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Input audio clock frequency. It affects the sampling rate.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clock-names
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    spdif@80010000 {
+      compatible = "xlnx,spdif-2.0";
+      reg = <0x80010000 0x10000>;
+      clock-names = "aud_clk_i", "s_axi_aclk";
+      clocks = <&misc_clk_0>, <&clk 71>;
+      interrupt-parent = <&gic>;
+      interrupts = <0 91 4>;
+      xlnx,spdif-mode = <1>;
+      xlnx,aud_clk_i = <49152913>;
+    };
+
+...

MAINTAINERS

@@ -26009,6 +26009,14 @@ S:	Maintained
 F:	drivers/pwm/pwm-xilinx.c
 F:	include/clocksource/timer-xilinx.h
 
+XILINX SOUND DRIVERS
+M:	Vincenzo Frascino <vincenzo.frascino@arm.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/sound/xlnx,i2s.yaml
+F:	Documentation/devicetree/bindings/sound/xlnx,audio-formatter.yaml
+F:	Documentation/devicetree/bindings/sound/xlnx,spdif.yaml
+F:	sound/soc/xilinx/*
+
 XILINX SD-FEC IP CORES
 M:	Derek Kiernan <derek.kiernan@amd.com>
 M:	Dragan Cvetic <dragan.cvetic@amd.com>