1 Cirrus Logic Lochnagar Audio Development Board
3 Lochnagar is an evaluation and development board for Cirrus Logic
4 Smart CODEC and Amp devices. It allows the connection of most Cirrus
5 Logic devices on mini-cards, as well as allowing connection of
6 various application processor systems to provide a full evaluation
7 platform. Audio system topology, clocking and power can all be
8 controlled through the Lochnagar, allowing the device under test
9 to be used in a variety of possible use cases.
11 This binding document describes the binding for the regulator portion
14 Also see these documents for generic binding information:
15 [1] Regulator: ../regulator/regulator.txt
17 This binding must be part of the Lochnagar MFD binding:
18 [2] ../mfd/cirrus,lochnagar.txt
22 - VDDCORE : Initialisation data for the VDDCORE regulator, which
23 supplies the CODECs digital core if it has no build regulator for that
26 - compatible : One of the following strings:
27 "cirrus,lochnagar2-vddcore"
28 - SYSVDD-supply: Primary power supply for the Lochnagar.
30 - MICVDD : Initialisation data for the MICVDD regulator, which
31 supplies the CODECs MICVDD.
33 - compatible : One of the following strings:
34 "cirrus,lochnagar2-micvdd"
35 - SYSVDD-supply: Primary power supply for the Lochnagar.
37 - MIC1VDD, MIC2VDD : Initialisation data for the MICxVDD supplies.
39 - compatible : One of the following strings:
40 "cirrus,lochnagar2-mic1vdd", "cirrus,lochnagar2-mic2vdd"
42 - cirrus,micbias-input : A property selecting which of the CODEC
43 minicard micbias outputs should be used, valid values are 1 - 4.
44 - MICBIAS1-supply, MICBIAS2-supply: Regulator supplies for the
45 MICxVDD outputs, supplying the digital microphones, normally
46 supplied from the attached CODEC.
48 - VDD1V8 : Recommended fixed regulator for the VDD1V8 regulator, which supplies the
49 CODECs analog and 1.8V digital supplies.
51 - compatible : Should be set to "regulator-fixed"
52 - regulator-min-microvolt : Should be set to 1.8V
53 - regulator-max-microvolt : Should be set to 1.8V
56 - vin-supply : Should be set to same supply as SYSVDD
61 lochnagar-micvdd: MICVDD {
62 compatible = "cirrus,lochnagar2-micvdd";
64 SYSVDD-supply = <&wallvdd>;
66 regulator-min-microvolt = <3300000>;
67 regulator-max-microvolt = <3300000>;
70 lochnagar-vdd1v8: VDD1V8 {
71 compatible = "regulator-fixed";
73 regulator-name = "VDD1V8";
74 regulator-min-microvolt = <1800000>;
75 regulator-max-microvolt = <1800000>;
79 vin-supply = <&wallvdd>;