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This patch adds binding documentation for the Cirrus Logic CS42L56 Low Power Stereo I2C CODEC Signed-off-by: Brian Austin <brian.austin@cirrus.com> Signed-off-by: Mark Brown <broonie@linaro.org>
64 lines
2.0 KiB
Plaintext
64 lines
2.0 KiB
Plaintext
CS42L52 audio CODEC
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Required properties:
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- compatible : "cirrus,cs42l56"
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- reg : the I2C address of the device for I2C
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- VA-supply, VCP-supply, VLDO-supply : power supplies for the device,
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as covered in Documentation/devicetree/bindings/regulator/regulator.txt.
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Optional properties:
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- cirrus,gpio-nreset : GPIO controller's phandle and the number
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of the GPIO used to reset the codec.
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- cirrus,chgfreq-divisor : Values used to set the Charge Pump Frequency.
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Allowable values of 0x00 through 0x0F. These are raw values written to the
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register, not the actual frequency. The frequency is determined by the following.
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Frequency = MCLK / 4 * (N+2)
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N = chgfreq_val
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MCLK = Where MCLK is the frequency of the mclk signal after the MCLKDIV2 circuit.
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- cirrus,ain1a-ref-cfg, ain1b-ref-cfg : boolean, If present, AIN1A or AIN1B are configured
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as a pseudo-differential input referenced to AIN1REF/AIN3A.
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- cirrus,ain2a-ref-cfg, ain2b-ref-cfg : boolean, If present, AIN2A or AIN2B are configured
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as a pseudo-differential input referenced to AIN2REF/AIN3B.
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- cirrus,micbias-lvl: Set the output voltage level on the MICBIAS Pin.
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0 = 0.5 x VA
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1 = 0.6 x VA
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2 = 0.7 x VA
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3 = 0.8 x VA
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4 = 0.83 x VA
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5 = 0.91 x VA
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- cirrus,adaptive-pwr-cfg : Configures how the power to the Headphone and Lineout
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Amplifiers adapt to the output signal levels.
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0 = Adapt to Volume Mode. Voltage level determined by the sum of the relevant volume settings.
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1 = Fixed - Headphone and Line Amp supply = + or - VCP/2.
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2 = Fixed - Headphone and Line Amp supply = + or - VCP.
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3 = Adapted to Signal; Voltage level is dynamically determined by the output signal.
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- cirrus,hpf-left-freq, hpf-right-freq : Sets the corner frequency (-3dB point) for the internal High-Pass
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Filter.
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0 = 1.8Hz
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1 = 119Hz
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2 = 236Hz
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3 = 464Hz
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Example:
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codec: codec@4b {
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compatible = "cirrus,cs42l56";
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reg = <0x4b>;
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gpio-reset = <&gpio 10 0>;
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cirrus,chgfreq-divisor = <0x05>;
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cirrus.ain1_ref_cfg;
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cirrus,micbias-lvl = <5>;
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VA-supply = <®_audio>;
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};
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