dt-bindings: clock: samsung: convert S5Pv210 AudSS to dtschema

* Samsung Audio Subsystem Clock Controller

The Samsung Audio Subsystem clock controller generates and supplies clocks

to Audio Subsystem block available in the S5PV210 and compatible SoCs.

Required Properties:

- compatible: should be "samsung,s5pv210-audss-clock".

- reg: physical base address and length of the controller's register set.

- #clock-cells: should be 1.

- clocks:

  - hclk: AHB bus clock of the Audio Subsystem.

  - xxti: Optional fixed rate PLL reference clock, parent of mout_audss. If

    not specified (i.e. xusbxti is used for PLL reference), it is fixed to

    a clock named "xxti".

  - fout_epll: Input PLL to the AudioSS block, parent of mout_audss.

  - iiscdclk0: Optional external i2s clock, parent of mout_i2s. If not

    specified, it is fixed to a clock named "iiscdclk0".

  - sclk_audio0: Audio bus clock, parent of mout_i2s.

- clock-names: Aliases for the above clocks. They should be "hclk",

  "xxti", "fout_epll", "iiscdclk0", and "sclk_audio0" respectively.

All available clocks are defined as preprocessor macros in

dt-bindings/clock/s5pv210-audss-clk.h header and can be used in device

tree sources.

Example: Clock controller node.

	clk_audss: clock-controller@c0900000 {

		compatible = "samsung,s5pv210-audss-clock";

		reg = <0xc0900000 0x1000>;

		#clock-cells = <1>;

		clock-names = "hclk", "xxti",

				"fout_epll", "sclk_audio0";

		clocks = <&clocks DOUT_HCLKP>, <&xxti>,

				<&clocks FOUT_EPLL>, <&clocks SCLK_AUDIO0>;

	};

Example: I2S controller node that consumes the clock generated by the clock

	 controller. Refer to the standard clock bindings for information

         about 'clocks' and 'clock-names' property.

	i2s0: i2s@3830000 {

		/* ... */

		clock-names = "iis", "i2s_opclk0",

				"i2s_opclk1";

		clocks = <&clk_audss CLK_I2S>, <&clk_audss CLK_I2S>,

				<&clk_audss CLK_DOUT_AUD_BUS>;

		/* ... */

	};

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/clock/samsung,s5pv210-audss-clock.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Samsung S5Pv210 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/s5pv210-audss.h header.

properties:

  compatible:

    const: samsung,s5pv210-audss-clock

  clocks:

    minItems: 4

    items:

      - description:

          AHB bus clock of the Audio Subsystem.

      - description:

          Optional fixed rate PLL reference clock, parent of mout_audss. If not

          specified (i.e. xusbxti is used for PLL reference), it is fixed to a

          clock named "xxti".

      - description:

          Input PLL to the AudioSS block, parent of mout_audss.

      - description:

          Audio bus clock, parent of mout_i2s.

      - description:

          Optional external i2s clock, parent of mout_i2s. If not specified, it

          is fixed to a clock named "iiscdclk0".

  clock-names:

    minItems: 4

    items:

      - const: hclk

      - const: xxti

      - const: fout_epll

      - const: sclk_audio0

      - const: iiscdclk0

  "#clock-cells":

    const: 1

  power-domains:

    maxItems: 1

  reg:

    maxItems: 1

required:

  - compatible

  - clocks

  - clock-names

  - "#clock-cells"

  - reg

additionalProperties: false

examples:

  - |

    #include <dt-bindings/clock/s5pv210.h>

    clock-controller@c0900000 {

        compatible = "samsung,s5pv210-audss-clock";

        reg = <0xc0900000 0x1000>;

        #clock-cells = <1>;

        clock-names = "hclk", "xxti", "fout_epll", "sclk_audio0";

        clocks = <&clocks DOUT_HCLKP>, <&xxti>, <&clocks FOUT_EPLL>,

                 <&clocks SCLK_AUDIO0>;

    };