mirror of
https://github.com/torvalds/linux.git
synced 2024-12-25 12:21:37 +00:00
45 lines
1.7 KiB
Plaintext
45 lines
1.7 KiB
Plaintext
|
Maxim MAX98504 class D mono speaker amplifier
|
||
|
|
||
|
This device supports I2C control interface and an IRQ output signal. It features
|
||
|
a PCM and PDM digital audio interface (DAI) and a differential analog input.
|
||
|
|
||
|
Required properties:
|
||
|
|
||
|
- compatible : "maxim,max98504"
|
||
|
- reg : should contain the I2C slave device address
|
||
|
- DVDD-supply, DIOVDD-supply, PVDD-supply: power supplies for the device,
|
||
|
as covered in ../regulator/regulator.txt
|
||
|
- interrupts : should specify the interrupt line the device is connected to,
|
||
|
as described in ../interrupt-controller/interrupts.txt
|
||
|
|
||
|
Optional properties:
|
||
|
|
||
|
- maxim,brownout-threshold - the PVDD brownout threshold, the value must be
|
||
|
from 0, 1...21 range, corresponding to 2.6V, 2.65V...3.65V voltage range
|
||
|
- maxim,brownout-attenuation - the brownout attenuation to the speaker gain
|
||
|
applied during the "attack hold" and "timed hold" phase, the value must be
|
||
|
from 0...6 (dB) range
|
||
|
- maxim,brownout-attack-hold-ms - the brownout attack hold phase time in ms,
|
||
|
0...255 (VBATBROWN_ATTK_HOLD, register 0x0018)
|
||
|
- maxim,brownout-timed-hold-ms - the brownout timed hold phase time in ms,
|
||
|
0...255 (VBATBROWN_TIME_HOLD, register 0x0019)
|
||
|
- maxim,brownout-release-rate-ms - the brownout release phase step time in ms,
|
||
|
0...255 (VBATBROWN_RELEASE, register 0x001A)
|
||
|
|
||
|
The default value when the above properties are not specified is 0,
|
||
|
the maxim,brownout-threshold property must be specified to actually enable
|
||
|
the PVDD brownout protection.
|
||
|
|
||
|
Example:
|
||
|
|
||
|
max98504@31 {
|
||
|
compatible = "maxim,max98504";
|
||
|
reg = <0x31>;
|
||
|
interrupt-parent = <&gpio_bank_0>;
|
||
|
interrupts = <2 0>;
|
||
|
|
||
|
DVDD-supply = <®ulator>;
|
||
|
DIOVDD-supply = <®ulator>;
|
||
|
PVDD-supply = <®ulator>;
|
||
|
};
|