[PATCH 1/4] ASoC: dt-bindings: Add Cadence I2S-SC controller

[joakim.zhang@cixtech.com]

From: Joakim Zhang <joakim.zhang@cixtech.com>

Add the DT binding for the Cadence I2S-SC controller integrated in
the CIX SKY1 audio subsystem. I2S-SC is a full-duplex stereo
controller supporting standard I2S, left/right-justified and DSP
formats, plus TDM operation with up to 16 slots.

Signed-off-by: Joakim Zhang <joakim.zhang@cixtech.com>
---
 .../bindings/sound/cix,sky1-i2s-sc.yaml       | 94 +++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/cix,sky1-i2s-sc.yaml

diff --git a/Documentation/devicetree/bindings/sound/cix,sky1-i2s-sc.yaml b/Documentation/devicetree/bindings/sound/cix,sky1-i2s-sc.yaml
new file mode 100644
index 000000000000..413e2ade4664
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/cix,sky1-i2s-sc.yaml
@@ -0,0 +1,94 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/cix,sky1-i2s-sc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cadence I2S-SC controller
+
+maintainers:
+  - Joakim Zhang <joakim.zhang@cixtech.com>
+
+description: |
+  The Cadence I2S-SC controller integrated in the CIX SKY1 audio subsystem.
+  It supports full-duplex stereo playback and capture in standard I2S,
+  left/right-justified and DSP modes, as well as TDM operation with up to
+  16 slots. The transmitter and receiver are started and stopped together
+  by the controller.
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    const: cix,sky1-i2s-sc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 4
+
+  clock-names:
+    items:
+      - const: hst
+      - const: i2s
+      - const: audio-clk0
+      - const: audio-clk2
+
+  resets:
+    maxItems: 1
+
+  dmas:
+    minItems: 1
+    maxItems: 2
+    description:
+      One DMA channel for instances wired for a single direction, either
+      "tx" or "rx", or two channels for both transmit and receive.
+
+  dma-names:
+    minItems: 1
+    maxItems: 2
+    items:
+      enum: [ tx, rx ]
+
+  "#sound-dai-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - resets
+  - dmas
+  - dma-names
+  - "#sound-dai-cells"
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    audss_dmac: dma-controller {
+        compatible = "cix,sky1-audss-dmac";
+        #dma-cells = <1>;
+    };
+
+    i2s@7020000 {
+        compatible = "cix,sky1-i2s-sc";
+        reg = <0x7020000 0x10000>;
+        interrupts = <GIC_SPI 219 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&audss_cru 16>, <&audss_cru 26>,
+                 <&scmi_clk 100>, <&scmi_clk 101>;
+        clock-names = "hst", "i2s", "audio-clk0", "audio-clk2";
+        resets = <&audss_cru 0>;
+        dmas = <&audss_dmac 0>, <&audss_dmac 1>;
+        dma-names = "tx", "rx";
+        #sound-dai-cells = <0>;
+    };
-- 
2.50.1