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The driver makes the crosstalk funciton disabled by default which can simplify the codec function. The platform may not need this funciton and reduce the potential risk. Therefore, We change the property "nuvoton,crosstalk-bypass" to "nuvoton,crosstalk-enable". The crosstalk measurement is enabled if the property is set. Otherwise, it is disabled. Besides, add more condition in the entry point of the crosstalk sequence to disable the function completely. Signed-off-by: John Hsu <KCHSU0@nuvoton.com> Signed-off-by: Mark Brown <broonie@kernel.org>
106 lines
3.4 KiB
Plaintext
106 lines
3.4 KiB
Plaintext
Nuvoton NAU8825 audio codec
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This device supports I2C only.
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Required properties:
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- compatible : Must be "nuvoton,nau8825"
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- reg : the I2C address of the device. This is either 0x1a (CSB=0) or 0x1b (CSB=1).
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Optional properties:
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- nuvoton,jkdet-enable: Enable jack detection via JKDET pin.
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- nuvoton,jkdet-pull-enable: Enable JKDET pin pull. If set - pin pull enabled,
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otherwise pin in high impedance state.
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- nuvoton,jkdet-pull-up: Pull-up JKDET pin. If set then JKDET pin is pull up, otherwise pull down.
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- nuvoton,jkdet-polarity: JKDET pin polarity. 0 - active high, 1 - active low.
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- nuvoton,vref-impedance: VREF Impedance selection
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0 - Open
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1 - 25 kOhm
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2 - 125 kOhm
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3 - 2.5 kOhm
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- nuvoton,micbias-voltage: Micbias voltage level.
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0 - VDDA
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1 - VDDA
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2 - VDDA * 1.1
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3 - VDDA * 1.2
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4 - VDDA * 1.3
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5 - VDDA * 1.4
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6 - VDDA * 1.53
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7 - VDDA * 1.53
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- nuvoton,sar-threshold-num: Number of buttons supported
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- nuvoton,sar-threshold: Impedance threshold for each button. Array that contains up to 8 buttons configuration. SAR value is calculated as
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SAR = 255 * MICBIAS / SAR_VOLTAGE * R / (2000 + R)
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where MICBIAS is configured by 'nuvoton,micbias-voltage', SAR_VOLTAGE is configured by 'nuvoton,sar-voltage', R - button impedance.
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Refer datasheet section 10.2 for more information about threshold calculation.
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- nuvoton,sar-hysteresis: Button impedance measurement hysteresis.
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- nuvoton,sar-voltage: Reference voltage for button impedance measurement.
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0 - VDDA
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1 - VDDA
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2 - VDDA * 1.1
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3 - VDDA * 1.2
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4 - VDDA * 1.3
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5 - VDDA * 1.4
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6 - VDDA * 1.53
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7 - VDDA * 1.53
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- nuvoton,sar-compare-time: SAR compare time
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0 - 500 ns
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1 - 1 us
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2 - 2 us
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3 - 4 us
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- nuvoton,sar-sampling-time: SAR sampling time
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0 - 2 us
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1 - 4 us
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2 - 8 us
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3 - 16 us
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- nuvoton,short-key-debounce: Button short key press debounce time.
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0 - 30 ms
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1 - 50 ms
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2 - 100 ms
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3 - 30 ms
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- nuvoton,jack-insert-debounce: number from 0 to 7 that sets debounce time to 2^(n+2) ms
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- nuvoton,jack-eject-debounce: number from 0 to 7 that sets debounce time to 2^(n+2) ms
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- nuvoton,crosstalk-enable: make crosstalk function enable if set.
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- clocks: list of phandle and clock specifier pairs according to common clock bindings for the
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clocks described in clock-names
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- clock-names: should include "mclk" for the MCLK master clock
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Example:
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headset: nau8825@1a {
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compatible = "nuvoton,nau8825";
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reg = <0x1a>;
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interrupt-parent = <&gpio>;
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interrupts = <TEGRA_GPIO(E, 6) IRQ_TYPE_LEVEL_LOW>;
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nuvoton,jkdet-enable;
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nuvoton,jkdet-pull-enable;
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nuvoton,jkdet-pull-up;
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nuvoton,jkdet-polarity = <GPIO_ACTIVE_LOW>;
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nuvoton,vref-impedance = <2>;
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nuvoton,micbias-voltage = <6>;
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// Setup 4 buttons impedance according to Android specification
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nuvoton,sar-threshold-num = <4>;
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nuvoton,sar-threshold = <0xc 0x1e 0x38 0x60>;
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nuvoton,sar-hysteresis = <1>;
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nuvoton,sar-voltage = <0>;
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nuvoton,sar-compare-time = <0>;
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nuvoton,sar-sampling-time = <0>;
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nuvoton,short-key-debounce = <2>;
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nuvoton,jack-insert-debounce = <7>;
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nuvoton,jack-eject-debounce = <7>;
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nuvoton,crosstalk-enable;
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clock-names = "mclk";
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clocks = <&tegra_car TEGRA210_CLK_CLK_OUT_2>;
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};
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