Commit | Line | Data |
---|---|---|
51ded0fb SN |
1 | Maxim MAX98504 class D mono speaker amplifier |
2 | ||
3 | This device supports I2C control interface and an IRQ output signal. It features | |
4 | a PCM and PDM digital audio interface (DAI) and a differential analog input. | |
5 | ||
6 | Required properties: | |
7 | ||
8 | - compatible : "maxim,max98504" | |
9 | - reg : should contain the I2C slave device address | |
10 | - DVDD-supply, DIOVDD-supply, PVDD-supply: power supplies for the device, | |
11 | as covered in ../regulator/regulator.txt | |
12 | - interrupts : should specify the interrupt line the device is connected to, | |
13 | as described in ../interrupt-controller/interrupts.txt | |
14 | ||
15 | Optional properties: | |
16 | ||
17 | - maxim,brownout-threshold - the PVDD brownout threshold, the value must be | |
18 | from 0, 1...21 range, corresponding to 2.6V, 2.65V...3.65V voltage range | |
19 | - maxim,brownout-attenuation - the brownout attenuation to the speaker gain | |
20 | applied during the "attack hold" and "timed hold" phase, the value must be | |
21 | from 0...6 (dB) range | |
22 | - maxim,brownout-attack-hold-ms - the brownout attack hold phase time in ms, | |
23 | 0...255 (VBATBROWN_ATTK_HOLD, register 0x0018) | |
24 | - maxim,brownout-timed-hold-ms - the brownout timed hold phase time in ms, | |
25 | 0...255 (VBATBROWN_TIME_HOLD, register 0x0019) | |
26 | - maxim,brownout-release-rate-ms - the brownout release phase step time in ms, | |
27 | 0...255 (VBATBROWN_RELEASE, register 0x001A) | |
28 | ||
29 | The default value when the above properties are not specified is 0, | |
30 | the maxim,brownout-threshold property must be specified to actually enable | |
31 | the PVDD brownout protection. | |
32 | ||
33 | Example: | |
34 | ||
35 | max98504@31 { | |
36 | compatible = "maxim,max98504"; | |
37 | reg = <0x31>; | |
38 | interrupt-parent = <&gpio_bank_0>; | |
39 | interrupts = <2 0>; | |
40 | ||
41 | DVDD-supply = <®ulator>; | |
42 | DIOVDD-supply = <®ulator>; | |
43 | PVDD-supply = <®ulator>; | |
44 | }; |