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 7title: Apple SoCs' NCO block 8 9maintainers: 10 - Martin Povišer <povik+lin@cutebit.org> 11 12description: | 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 20properties: 21 compatible: 22 items: 23 - enum: 24 - apple,t6000-nco 25 - apple,t8103-nco 26 - apple,t8112-nco 27 - const: apple,nco 28 29 clocks: 30 description: 31 Specifies the reference clock from which the output clocks 32 are derived through fractional division. 33 maxItems: 1 34 35 '#clock-cells': 36 const: 1 37 38 reg: 39 maxItems: 1 40 41required: 42 - compatible 43 - clocks 44 - '#clock-cells' 45 - reg 46 47additionalProperties: false 48 49examples: 50 - | 51 nco_clkref: clock-ref { 52 compatible = "fixed-clock"; 53 #clock-cells = <0>; 54 clock-frequency = <900000000>; 55 clock-output-names = "nco-ref"; 56 }; 57 58 nco: clock-controller@23b044000 { 59 compatible = "apple,t8103-nco", "apple,nco"; 60 reg = <0x3b044000 0x14000>; 61 #clock-cells = <1>; 62 clocks = <&nco_clkref>; 63 }; 64