dt-bindings: clock: samsung: convert Exynos AudSS to dtschema

Convert Samsung Exynos Audio SubSystem clock controller bindings to DT
schema format using json-schema.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20210825134251.220098-1-krzysztof.kozlowski@canonical.com
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/samsung,exynos-audss-clock.yaml

@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/samsung,exynos-audss-clock.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung Exynos SoC Audio SubSystem clock controller
+
+maintainers:
+  - Chanwoo Choi <cw00.choi@samsung.com>
+  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+  - Sylwester Nawrocki <s.nawrocki@samsung.com>
+  - Tomasz Figa <tomasz.figa@gmail.com>
+
+description: |
+  All available clocks are defined as preprocessor macros in
+  include/dt-bindings/clock/exynos-audss-clk.h header.
+
+properties:
+  compatible:
+    enum:
+      - samsung,exynos4210-audss-clock
+      - samsung,exynos5250-audss-clock
+      - samsung,exynos5410-audss-clock
+      - samsung,exynos5420-audss-clock
+
+  clocks:
+    minItems: 2
+    items:
+      - description:
+          Fixed rate PLL reference clock, parent of mout_audss. "fin_pll" is
+          used if not specified.
+      - description:
+          Input PLL to the AudioSS block, parent of mout_audss. "fout_epll" is
+          used if not specified.
+      - description:
+          Audio bus clock, parent of mout_i2s. "sclk_audio0" is used if not
+          specified.
+      - description:
+          PCM clock, parent of sclk_pcm.  "sclk_pcm0" is used if not specified.
+      - description:
+          External i2s clock, parent of mout_i2s. "cdclk0" is used if not
+          specified.
+
+  clock-names:
+    minItems: 2
+    items:
+      - const: pll_ref
+      - const: pll_in
+      - const: sclk_audio
+      - const: sclk_pcm_in
+      - const: cdclk
+
+  "#clock-cells":
+    const: 1
+
+  power-domains:
+    maxItems: 1
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - clocks
+  - clock-names
+  - "#clock-cells"
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    clock-controller@3810000 {
+        compatible = "samsung,exynos5250-audss-clock";
+        reg = <0x03810000 0x0c>;
+        #clock-cells = <1>;
+        clocks = <&clock 1>, <&clock 7>, <&clock 138>, <&clock 160>, <&ext_i2s_clk>;
+        clock-names = "pll_ref", "pll_in", "sclk_audio", "sclk_pcm_in", "cdclk";
+    };