68 lines
1.9 KiB
Plaintext
68 lines
1.9 KiB
Plaintext
CS43130 DAC
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Required properties:
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- compatible : "cirrus,cs43130", "cirrus,cs4399", "cirrus,cs43131",
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"cirrus,cs43198"
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- reg : the I2C address of the device for I2C
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- VA-supply, VP-supply, VL-supply, VCP-supply, VD-supply:
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power supplies for the device, as covered in
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Documentation/devicetree/bindings/regulator/regulator.txt.
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Optional properties:
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- reset-gpios : Active low GPIO used to reset the device
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- cirrus,xtal-ibias:
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When external MCLK is generated by external crystal
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oscillator, CS43130 can be used to provide bias current
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for external crystal. Amount of bias current sent is
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set as:
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1 = 7.5uA
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2 = 12.5uA
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3 = 15uA
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- cirrus,dc-measure:
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Boolean, define to enable headphone DC impedance measurement.
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- cirrus,ac-measure:
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Boolean, define to enable headphone AC impedance measurement.
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DC impedance must also be enabled for AC impedance measurement.
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- cirrus,dc-threshold:
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Define 2 DC impedance thresholds in ohms for HP output control.
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Default values are 50 and 120 Ohms.
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- cirrus,ac-freq:
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Define the frequencies at which to measure HP AC impedance.
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Only used if "cirrus,dc-measure" is defined.
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Exactly 10 frequencies must be defined.
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If this properties is undefined, by default,
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following frequencies are used:
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<24 43 93 200 431 928 2000 4309 9283 20000>
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The above frequencies are logarithmically equally spaced.
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Log base is 10.
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Example:
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cs43130: audio-codec@30 {
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compatible = "cirrus,cs43130";
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reg = <0x30>;
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reset-gpios = <&axi_gpio 54 0>;
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VA-supply = <&dummy_vreg>;
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VP-supply = <&dummy_vreg>;
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VL-supply = <&dummy_vreg>;
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VCP-supply = <&dummy_vreg>;
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VD-supply = <&dummy_vreg>;
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cirrus,xtal-ibias = <2>;
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interrupt-parent = <&gpio0>;
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interrupts = <55 8>;
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cirrus,dc-measure;
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cirrus,ac-measure;
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cirrus,dc-threshold = /bits/ 16 <20 100>;
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cirrus,ac-freq = /bits/ 16 <24 43 93 200 431 928 2000 4309 9283 20000>;
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};
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