| Tom Rini | 762f85b | 2024-07-20 11:15:10 -0600 | [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/sound/nuvoton,nau8325.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: NAU8325 audio Amplifier |
| 8 | |
| 9 | maintainers: |
| 10 | - Seven Lee <WTLI@nuvoton.com> |
| 11 | |
| 12 | allOf: |
| 13 | - $ref: dai-common.yaml# |
| 14 | |
| 15 | properties: |
| 16 | compatible: |
| 17 | const: nuvoton,nau8325 |
| 18 | |
| 19 | reg: |
| 20 | maxItems: 1 |
| 21 | |
| 22 | nuvoton,vref-impedance-ohms: |
| 23 | description: |
| 24 | The vref impedance to be used in ohms. Middle of voltage enables |
| 25 | Tie-Off selection options. Due to the high impedance of the VREF |
| 26 | pin, it is important to use a low-leakage capacitor. |
| 27 | |
| 28 | enum: [0, 25000, 125000, 2500] |
| 29 | |
| 30 | nuvoton,dac-vref-microvolt: |
| 31 | description: |
| 32 | The DAC vref to be used in voltage. DAC reference voltage setting. Can |
| 33 | be used for minor tuning of the output level. Since the VDDA is range |
| 34 | between 1.62 to 1.98 voltage, the typical value for design is 1.8V. After |
| 35 | the minor tuning, the final microvolt are as the below. |
| 36 | |
| 37 | enum: [1800000, 2700000, 2880000, 3060000] |
| 38 | |
| 39 | nuvoton,alc-enable: |
| 40 | description: |
| 41 | Enable digital automatic level control (ALC) function. |
| 42 | type: boolean |
| 43 | |
| 44 | nuvoton,clock-detection-disable: |
| 45 | description: |
| 46 | When clock detection is enabled, it will detect whether MCLK |
| 47 | and FS are within the range. MCLK range is from 2.048MHz to 24.576MHz. |
| 48 | FS range is from 8kHz to 96kHz. And also needs to detect the ratio |
| 49 | MCLK_SRC/LRCK of 256, 400 or 500, and needs to detect the BCLK |
| 50 | to make sure data is present. There needs to be at least 8 BCLK |
| 51 | cycles per Frame Sync. |
| 52 | type: boolean |
| 53 | |
| 54 | nuvoton,clock-det-data: |
| 55 | description: |
| 56 | Request clock detection to require 2048 non-zero samples before enabling |
| 57 | the audio paths. If set then non-zero samples is required, otherwise it |
| 58 | doesn't matter. |
| 59 | type: boolean |
| 60 | |
| 61 | required: |
| 62 | - compatible |
| 63 | - reg |
| 64 | |
| 65 | unevaluatedProperties: false |
| 66 | |
| 67 | examples: |
| 68 | - | |
| 69 | i2c { |
| 70 | #address-cells = <1>; |
| 71 | #size-cells = <0>; |
| 72 | codec@21 { |
| 73 | compatible = "nuvoton,nau8325"; |
| 74 | reg = <0x21>; |
| 75 | nuvoton,vref-impedance-ohms = <125000>; |
| 76 | nuvoton,dac-vref-microvolt = <2880000>; |
| 77 | nuvoton,alc-enable; |
| 78 | nuvoton,clock-det-data; |
| 79 | }; |
| 80 | }; |