kernel-ark/Documentation/devicetree/bindings/clock/ti,lmk04832.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/clock/ti,lmk04832.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Clock bindings for the Texas Instruments LMK04832

maintainers:
  - Liam Beguin <liambeguin@gmail.com>

description: |
  Devicetree binding for the LMK04832, a clock conditioner with JEDEC JESD204B
  support. The LMK04832 is pin compatible with the LMK0482x family.

  Link to datasheet, https://www.ti.com/lit/ds/symlink/lmk04832.pdf  

properties:
  compatible:
    enum:
      - ti,lmk04832

  reg:
    maxItems: 1

  '#address-cells':
    const: 1

  '#size-cells':
    const: 0

  '#clock-cells':
    const: 1

  spi-max-frequency:
    maximum: 5000000

  clocks:
    items:
      - description: PLL2 reference clock.

  clock-names:
    items:
      - const: oscin

  reset-gpios:
    maxItems: 1

  ti,spi-4wire-rdbk:
    description: |
      Select SPI 4wire readback pin configuration.
      Available readback pins are,
        CLKin_SEL0 0
        CLKin_SEL1 1
        RESET 2      
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [0, 1, 2]
    default: 1

  ti,vco-hz:
    description: Optional to set VCO frequency of the PLL in Hertz.

  ti,sysref-ddly:
    description: SYSREF digital delay value.
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 8
    maximum: 8191
    default: 8

  ti,sysref-mux:
    description: |
      SYSREF Mux configuration.
      Available options are,
        Normal SYNC 0
        Re-clocked 1
        SYSREF Pulser 2
        SYSREF Continuous 3      
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [0, 1, 2, 3]
    default: 3

  ti,sync-mode:
    description: SYNC pin configuration.
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [0, 1, 2]
    default: 1

  ti,sysref-pulse-count:
    description:
      Number of SYSREF pulses to send when SYSREF is not in continuous mode.
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [1, 2, 4, 8]
    default: 4

patternProperties:
  "@[0-9a-d]+$":
    type: object
    description:
      Child nodes used to configure output clocks.

    properties:
      reg:
        description:
          clock output identifier.
        minimum: 0
        maximum: 13

      ti,clkout-fmt:
        description:
          Clock output format.
          Available options are,
            Powerdown 0x00
            LVDS 0x01
            HSDS 6 mA 0x02
            HSDS 8 mA 0x03
            LVPECL 1600 mV 0x04
            LVPECL 2000 mV 0x05
            LCPECL 0x06
            CML 16 mA 0x07
            CML 24 mA 0x08
            CML 32 mA 0x09
            CMOS (Off/Inverted) 0x0a
            CMOS (Normal/Off) 0x0b
            CMOS (Inverted/Inverted) 0x0c
            CMOS (Inverted/Normal) 0x0d
            CMOS (Normal/Inverted) 0x0e
            CMOS (Normal/Normal) 0x0f
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 15

      ti,clkout-sysref:
        description:
          Select SYSREF clock path for output clock.
        type: boolean

    required:
      - reg

    additionalProperties: false

required:
  - compatible
  - reg
  - '#clock-cells'
  - clocks
  - clock-names

additionalProperties: false

examples:
  - |
    clocks {
        lmk04832_oscin: oscin {
            compatible = "fixed-clock";

            #clock-cells = <0>;
            clock-frequency = <122880000>;
            clock-output-names = "lmk04832-oscin";
        };
    };

    spi0 {
        #address-cells = <1>;
        #size-cells = <0>;

        lmk04832: clock-controller@0 {
            #address-cells = <1>;
            #size-cells = <0>;

            reg = <0>;

            compatible = "ti,lmk04832";
            spi-max-frequency = <781250>;

            reset-gpios = <&gpio_lmk 0 0 0>;

            #clock-cells = <1>;
            clocks = <&lmk04832_oscin>;
            clock-names = "oscin";

            ti,spi-4wire-rdbk = <0>;
            ti,vco-hz = <2457600000>;

            assigned-clocks =
                <&lmk04832 0>, <&lmk04832 1>,
                <&lmk04832 2>, <&lmk04832 3>,
                <&lmk04832 4>,
                <&lmk04832 6>, <&lmk04832 7>,
                <&lmk04832 10>, <&lmk04832 11>;
            assigned-clock-rates =
                <122880000>, <384000>,
                <122880000>, <384000>,
                <122880000>,
                <153600000>, <384000>,
                <614400000>, <384000>;

            clkout0@0 {
                reg = <0>;
                ti,clkout-fmt = <0x01>; // LVDS
            };

            clkout1@1 {
                reg = <1>;
                ti,clkout-fmt = <0x01>; // LVDS
                ti,clkout-sysref;
            };
        };
    };