1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/sound/nvidia,tegra186-dspk.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Tegra186 DSPK Controller Device Tree Bindings 8 9description: | 10 The Digital Speaker Controller (DSPK) can be viewed as a Pulse 11 Density Modulation (PDM) transmitter that up-samples the input to 12 the desired sampling rate by interpolation and then converts the 13 over sampled Pulse Code Modulation (PCM) input to the desired 1-bit 14 output via Delta Sigma Modulation (DSM). 15 16maintainers: 17 - Jon Hunter <jonathanh@nvidia.com> 18 - Sameer Pujar <spujar@nvidia.com> 19 20properties: 21 $nodename: 22 pattern: "^dspk@[0-9a-f]*$" 23 24 compatible: 25 oneOf: 26 - const: nvidia,tegra186-dspk 27 - items: 28 - const: nvidia,tegra194-dspk 29 - const: nvidia,tegra186-dspk 30 31 reg: 32 maxItems: 1 33 34 clocks: 35 maxItems: 1 36 37 clock-names: 38 const: dspk 39 40 assigned-clocks: 41 maxItems: 1 42 43 assigned-clock-parents: 44 maxItems: 1 45 46 assigned-clock-rates: 47 maxItems: 1 48 49 sound-name-prefix: 50 pattern: "^DSPK[1-9]$" 51 $ref: /schemas/types.yaml#/definitions/string 52 description: 53 Used as prefix for sink/source names of the component. Must be a 54 unique string among multiple instances of the same component. 55 The name can be "DSPK1" or "DSPKx", where x depends on the maximum 56 available instances on a Tegra SoC. 57 58required: 59 - compatible 60 - reg 61 - clocks 62 - clock-names 63 - assigned-clocks 64 - assigned-clock-parents 65 - sound-name-prefix 66 67examples: 68 - | 69 #include<dt-bindings/clock/tegra186-clock.h> 70 71 dspk@2905000 { 72 compatible = "nvidia,tegra186-dspk"; 73 reg = <0x2905000 0x100>; 74 clocks = <&bpmp TEGRA186_CLK_DSPK1>; 75 clock-names = "dspk"; 76 assigned-clocks = <&bpmp TEGRA186_CLK_DSPK1>; 77 assigned-clock-parents = <&bpmp TEGRA186_CLK_PLL_A_OUT0>; 78 assigned-clock-rates = <12288000>; 79 sound-name-prefix = "DSPK1"; 80 }; 81 82... 83