83 lines
2.8 KiB
Plaintext
83 lines
2.8 KiB
Plaintext
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Cirrus Logic Lochnagar Audio Development Board
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Lochnagar is an evaluation and development board for Cirrus Logic
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Smart CODEC and Amp devices. It allows the connection of most Cirrus
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Logic devices on mini-cards, as well as allowing connection of
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various application processor systems to provide a full evaluation
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platform. Audio system topology, clocking and power can all be
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controlled through the Lochnagar, allowing the device under test
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to be used in a variety of possible use cases.
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This binding document describes the binding for the regulator portion
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of the driver.
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Also see these documents for generic binding information:
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[1] Regulator: ../regulator/regulator.txt
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This binding must be part of the Lochnagar MFD binding:
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[2] ../mfd/cirrus,lochnagar.txt
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Optional sub-nodes:
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- VDDCORE : Initialisation data for the VDDCORE regulator, which
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supplies the CODECs digital core if it has no build regulator for that
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purpose.
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Required Properties:
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- compatible : One of the following strings:
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"cirrus,lochnagar2-vddcore"
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- SYSVDD-supply: Primary power supply for the Lochnagar.
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- MICVDD : Initialisation data for the MICVDD regulator, which
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supplies the CODECs MICVDD.
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Required Properties:
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- compatible : One of the following strings:
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"cirrus,lochnagar2-micvdd"
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- SYSVDD-supply: Primary power supply for the Lochnagar.
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- MIC1VDD, MIC2VDD : Initialisation data for the MICxVDD supplies.
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Required Properties:
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- compatible : One of the following strings:
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"cirrus,lochnagar2-mic1vdd", "cirrus,lochnagar2-mic2vdd"
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Optional Properties:
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- cirrus,micbias-input : A property selecting which of the CODEC
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minicard micbias outputs should be used, valid values are 1 - 4.
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- MICBIAS1-supply, MICBIAS2-supply: Regulator supplies for the
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MICxVDD outputs, supplying the digital microphones, normally
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supplied from the attached CODEC.
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- VDD1V8 : Recommended fixed regulator for the VDD1V8 regulator, which supplies the
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CODECs analog and 1.8V digital supplies.
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Required Properties:
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- compatible : Should be set to "regulator-fixed"
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- regulator-min-microvolt : Should be set to 1.8V
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- regulator-max-microvolt : Should be set to 1.8V
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- regulator-boot-on
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- regulator-always-on
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- vin-supply : Should be set to same supply as SYSVDD
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Example:
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lochnagar {
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lochnagar-micvdd: MICVDD {
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compatible = "cirrus,lochnagar2-micvdd";
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SYSVDD-supply = <&wallvdd>;
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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};
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lochnagar-vdd1v8: VDD1V8 {
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compatible = "regulator-fixed";
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regulator-name = "VDD1V8";
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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regulator-boot-on;
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regulator-always-on;
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vin-supply = <&wallvdd>;
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};
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};
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