forked from Minki/linux
34ca27f34f
Sponsored-by: Google Chromium project Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
103 lines
3.3 KiB
Plaintext
103 lines
3.3 KiB
Plaintext
Nuvoton NAU8825 audio codec
|
|
|
|
This device supports I2C only.
|
|
|
|
Required properties:
|
|
- compatible : Must be "nuvoton,nau8825"
|
|
|
|
- reg : the I2C address of the device. This is either 0x1a (CSB=0) or 0x1b (CSB=1).
|
|
|
|
Optional properties:
|
|
- nuvoton,jkdet-enable: Enable jack detection via JKDET pin.
|
|
- nuvoton,jkdet-pull-enable: Enable JKDET pin pull. If set - pin pull enabled,
|
|
otherwise pin in high impedance state.
|
|
- nuvoton,jkdet-pull-up: Pull-up JKDET pin. If set then JKDET pin is pull up, otherwise pull down.
|
|
- nuvoton,jkdet-polarity: JKDET pin polarity. 0 - active high, 1 - active low.
|
|
|
|
- nuvoton,vref-impedance: VREF Impedance selection
|
|
0 - Open
|
|
1 - 25 kOhm
|
|
2 - 125 kOhm
|
|
3 - 2.5 kOhm
|
|
|
|
- nuvoton,micbias-voltage: Micbias voltage level.
|
|
0 - VDDA
|
|
1 - VDDA
|
|
2 - VDDA * 1.1
|
|
3 - VDDA * 1.2
|
|
4 - VDDA * 1.3
|
|
5 - VDDA * 1.4
|
|
6 - VDDA * 1.53
|
|
7 - VDDA * 1.53
|
|
|
|
- nuvoton,sar-threshold-num: Number of buttons supported
|
|
- nuvoton,sar-threshold: Impedance threshold for each button. Array that contains up to 8 buttons configuration. SAR value is calculated as
|
|
SAR = 255 * MICBIAS / SAR_VOLTAGE * R / (2000 + R)
|
|
where MICBIAS is configured by 'nuvoton,micbias-voltage', SAR_VOLTAGE is configured by 'nuvoton,sar-voltage', R - button impedance.
|
|
Refer datasheet section 10.2 for more information about threshold calculation.
|
|
|
|
- nuvoton,sar-hysteresis: Button impedance measurement hysteresis.
|
|
|
|
- nuvoton,sar-voltage: Reference voltage for button impedance measurement.
|
|
0 - VDDA
|
|
1 - VDDA
|
|
2 - VDDA * 1.1
|
|
3 - VDDA * 1.2
|
|
4 - VDDA * 1.3
|
|
5 - VDDA * 1.4
|
|
6 - VDDA * 1.53
|
|
7 - VDDA * 1.53
|
|
|
|
- nuvoton,sar-compare-time: SAR compare time
|
|
0 - 500 ns
|
|
1 - 1 us
|
|
2 - 2 us
|
|
3 - 4 us
|
|
|
|
- nuvoton,sar-sampling-time: SAR sampling time
|
|
0 - 2 us
|
|
1 - 4 us
|
|
2 - 8 us
|
|
3 - 16 us
|
|
|
|
- nuvoton,short-key-debounce: Button short key press debounce time.
|
|
0 - 30 ms
|
|
1 - 50 ms
|
|
2 - 100 ms
|
|
3 - 30 ms
|
|
|
|
- nuvoton,jack-insert-debounce: number from 0 to 7 that sets debounce time to 2^(n+2) ms
|
|
- nuvoton,jack-eject-debounce: number from 0 to 7 that sets debounce time to 2^(n+2) ms
|
|
|
|
- clocks: list of phandle and clock specifier pairs according to common clock bindings for the
|
|
clocks described in clock-names
|
|
- clock-names: should include "mclk" for the MCLK master clock
|
|
|
|
Example:
|
|
|
|
headset: nau8825@1a {
|
|
compatible = "nuvoton,nau8825";
|
|
reg = <0x1a>;
|
|
interrupt-parent = <&gpio>;
|
|
interrupts = <TEGRA_GPIO(E, 6) IRQ_TYPE_LEVEL_LOW>;
|
|
nuvoton,jkdet-enable;
|
|
nuvoton,jkdet-pull-enable;
|
|
nuvoton,jkdet-pull-up;
|
|
nuvoton,jkdet-polarity = <GPIO_ACTIVE_LOW>;
|
|
nuvoton,vref-impedance = <2>;
|
|
nuvoton,micbias-voltage = <6>;
|
|
// Setup 4 buttons impedance according to Android specification
|
|
nuvoton,sar-threshold-num = <4>;
|
|
nuvoton,sar-threshold = <0xc 0x1e 0x38 0x60>;
|
|
nuvoton,sar-hysteresis = <1>;
|
|
nuvoton,sar-voltage = <0>;
|
|
nuvoton,sar-compare-time = <0>;
|
|
nuvoton,sar-sampling-time = <0>;
|
|
nuvoton,short-key-debounce = <2>;
|
|
nuvoton,jack-insert-debounce = <7>;
|
|
nuvoton,jack-eject-debounce = <7>;
|
|
|
|
clock-names = "mclk";
|
|
clocks = <&tegra_car TEGRA210_CLK_CLK_OUT_2>;
|
|
};
|