| Martin Povišer | 00d5d03 | 2022-02-08 19:34:09 +0100 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/clock/apple,nco.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Apple SoCs' NCO block |
| 8 | |
| 9 | maintainers: |
| 10 | - Martin Povišer <povik+lin@cutebit.org> |
| 11 | |
| 12 | description: | |
| 13 | The NCO (Numerically Controlled Oscillator) block found on Apple SoCs |
| 14 | such as the t8103 (M1) is a programmable clock generator performing |
| 15 | fractional division of a high frequency input clock. |
| 16 | |
| 17 | It carries a number of independent channels and is typically used for |
| 18 | generation of audio bitclocks. |
| 19 | |
| 20 | properties: |
| 21 | compatible: |
| 22 | items: |
| 23 | - enum: |
| 24 | - apple,t6000-nco |
| 25 | - apple,t8103-nco |
| 26 | - const: apple,nco |
| 27 | |
| 28 | clocks: |
| 29 | description: |
| 30 | Specifies the reference clock from which the output clocks |
| 31 | are derived through fractional division. |
| 32 | maxItems: 1 |
| 33 | |
| 34 | '#clock-cells': |
| 35 | const: 1 |
| 36 | |
| 37 | reg: |
| 38 | maxItems: 1 |
| 39 | |
| 40 | required: |
| 41 | - compatible |
| 42 | - clocks |
| 43 | - '#clock-cells' |
| 44 | - reg |
| 45 | |
| 46 | additionalProperties: false |
| 47 | |
| 48 | examples: |
| 49 | - | |
| 50 | nco_clkref: clock-ref { |
| 51 | compatible = "fixed-clock"; |
| 52 | #clock-cells = <0>; |
| 53 | clock-frequency = <900000000>; |
| 54 | clock-output-names = "nco-ref"; |
| 55 | }; |
| 56 | |
| 57 | nco: clock-controller@23b044000 { |
| 58 | compatible = "apple,t8103-nco", "apple,nco"; |
| 59 | reg = <0x3b044000 0x14000>; |
| 60 | #clock-cells = <1>; |
| 61 | clocks = <&nco_clkref>; |
| 62 | }; |
