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Commit 34ca27f3 authored by Anatol Pomozov's avatar Anatol Pomozov Committed by Mark Brown
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ASoC: nau8825: Add driver for headset chip Nuvoton 8825 



Sponsored-by: Google Chromium project
Signed-off-by: default avatarAnatol Pomozov <anatol.pomozov@gmail.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 95291382

Documentation/devicetree/bindings/sound/nau8825.txt

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+102 −0
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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>;

  };

sound/soc/codecs/Kconfig

+4 −0
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@@ -79,6 +79,7 @@ config SND_SOC_ALL_CODECS 
	select SND_SOC_MAX9877 if I2C

	select SND_SOC_MC13783 if MFD_MC13XXX

	select SND_SOC_ML26124 if I2C

	select SND_SOC_NAU8825 if I2C

	select SND_SOC_PCM1681 if I2C

	select SND_SOC_PCM1792A if SPI_MASTER

	select SND_SOC_PCM3008
@@ -892,6 +893,9 @@ config SND_SOC_MC13783 
config SND_SOC_ML26124

	tristate



config SND_SOC_NAU8825

	tristate



config SND_SOC_TPA6130A2

	tristate "Texas Instruments TPA6130A2 headphone amplifier"

	depends on I2C

sound/soc/codecs/Makefile

+2 −0
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@@ -72,6 +72,7 @@ snd-soc-max98925-objs := max98925.o 
snd-soc-max9850-objs := max9850.o

snd-soc-mc13783-objs := mc13783.o

snd-soc-ml26124-objs := ml26124.o

snd-soc-nau8825-objs := nau8825.o

snd-soc-pcm1681-objs := pcm1681.o

snd-soc-pcm1792a-codec-objs := pcm1792a.o

snd-soc-pcm3008-objs := pcm3008.o
@@ -263,6 +264,7 @@ obj-$(CONFIG_SND_SOC_MAX98925) += snd-soc-max98925.o 
obj-$(CONFIG_SND_SOC_MAX9850)	+= snd-soc-max9850.o

obj-$(CONFIG_SND_SOC_MC13783)	+= snd-soc-mc13783.o

obj-$(CONFIG_SND_SOC_ML26124)	+= snd-soc-ml26124.o

obj-$(CONFIG_SND_SOC_NAU8825)   += snd-soc-nau8825.o

obj-$(CONFIG_SND_SOC_PCM1681)	+= snd-soc-pcm1681.o

obj-$(CONFIG_SND_SOC_PCM1792A)	+= snd-soc-pcm1792a-codec.o

obj-$(CONFIG_SND_SOC_PCM3008)	+= snd-soc-pcm3008.o