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+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/cirrus,lochnagar.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cirrus Logic Lochnagar Audio Development Board
+
+maintainers:
+ - patches@opensource.cirrus.com
+
+description: |
+ Lochnagar is an evaluation and development board for Cirrus Logic
+ Smart CODEC and Amp devices. It allows the connection of most Cirrus
+ Logic devices on mini-cards, as well as allowing connection of
+ various application processor systems to provide a full evaluation
+ platform. Audio system topology, clocking and power can all be
+ controlled through the Lochnagar, allowing the device under test
+ to be used in a variety of possible use cases.
+
+ Also see these documents for generic binding information:
+ [1] GPIO : ../gpio/gpio.txt
+
+ And these for relevant defines:
+ [2] include/dt-bindings/pinctrl/lochnagar.h
+ [3] include/dt-bindings/clock/lochnagar.h
+
+ And these documents for the required sub-node binding details:
+ [4] Clock: ../clock/cirrus,lochnagar.yaml
+ [5] Pinctrl: ../pinctrl/cirrus,lochnagar.yaml
+ [6] Sound: ../sound/cirrus,lochnagar.yaml
+ [7] Hardware Monitor: ../hwmon/cirrus,lochnagar.yaml
+
+allOf:
+ - if:
+ properties:
+ compatible:
+ enum:
+ - cirrus,lochnagar2
+ then:
+ properties:
+ lochnagar-hwmon:
+ type: object
+ $ref: /schemas/hwmon/cirrus,lochnagar.yaml#
+
+ lochnagar-sc:
+ type: object
+ $ref: /schemas/sound/cirrus,lochnagar.yaml#
+
+properties:
+ compatible:
+ enum:
+ - cirrus,lochnagar1
+ - cirrus,lochnagar2
+
+ reg:
+ const: 0x22
+
+ reset-gpios:
+ maxItems: 1
+
+ present-gpios:
+ description: |
+ Host present line, indicating the presence of a
+ host system, see [1]. This can be omitted if the present line is
+ tied in hardware.
+ maxItems: 1
+
+ lochnagar-clk:
+ type: object
+ $ref: /schemas/clock/cirrus,lochnagar.yaml#
+
+ lochnagar-pmic32k:
+ type: object
+ $ref: /schemas/clock/fixed-clock.yaml#
+ properties:
+ clock-frequency:
+ const: 32768
+
+ lochnagar-clk12m:
+ type: object
+ $ref: /schemas/clock/fixed-clock.yaml#
+ properties:
+ clock-frequency:
+ const: 12288000
+
+ lochnagar-clk11m:
+ type: object
+ $ref: /schemas/clock/fixed-clock.yaml#
+ properties:
+ clock-frequency:
+ const: 11298600
+
+ lochnagar-clk24m:
+ type: object
+ $ref: /schemas/clock/fixed-clock.yaml#
+ properties:
+ clock-frequency:
+ const: 24576000
+
+ lochnagar-clk22m:
+ type: object
+ $ref: /schemas/clock/fixed-clock.yaml#
+ properties:
+ clock-frequency:
+ const: 22579200
+
+ lochnagar-clk8m:
+ type: object
+ $ref: /schemas/clock/fixed-clock.yaml#
+ properties:
+ clock-frequency:
+ const: 8192000
+
+ lochnagar-usb24m:
+ type: object
+ $ref: /schemas/clock/fixed-clock.yaml#
+ properties:
+ clock-frequency:
+ const: 24576000
+
+ lochnagar-usb12m:
+ type: object
+ $ref: /schemas/clock/fixed-clock.yaml#
+ properties:
+ clock-frequency:
+ const: 12288000
+
+ pinctrl:
+ type: object
+ $ref: /schemas/pinctrl/cirrus,lochnagar.yaml#
+
+ lochnagar-hwmon:
+ type: object
+ $ref: /schemas/hwmon/cirrus,lochnagar.yaml#
+
+ lochnagar-sc:
+ type: object
+ $ref: /schemas/sound/cirrus,lochnagar.yaml#
+
+ VDDCORE:
+ description:
+ Initialisation data for the VDDCORE regulator, which supplies the
+ CODECs digital core if not being provided by an internal regulator.
+ type: object
+ $ref: /schemas/regulator/regulator.yaml#
+ unevaluatedProperties: false
+ properties:
+ compatible:
+ enum:
+ - cirrus,lochnagar2-vddcore
+
+ SYSVDD-supply:
+ description:
+ Primary power supply for the Lochnagar.
+ required:
+ - compatible
+
+ MICVDD:
+ description:
+ Initialisation data for the MICVDD regulator, which supplies the
+ CODECs MICVDD.
+ type: object
+ $ref: /schemas/regulator/regulator.yaml#
+ unevaluatedProperties: false
+ properties:
+ compatible:
+ enum:
+ - cirrus,lochnagar2-micvdd
+
+ SYSVDD-supply:
+ description:
+ Primary power supply for the Lochnagar.
+ required:
+ - compatible
+
+ MIC1VDD:
+ description:
+ Initialisation data for the MIC1VDD supplies.
+ type: object
+ $ref: /schemas/regulator/regulator.yaml#
+ unevaluatedProperties: false
+ properties:
+ compatible:
+ enum:
+ - cirrus,lochnagar2-mic1vdd
+
+ cirrus,micbias-input:
+ description:
+ A property selecting which of the CODEC minicard micbias outputs
+ should be used.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 1
+ maximum: 4
+
+ MICBIAS1-supply:
+ description:
+ Regulator supplies for the MIC1VDD outputs, supplying the digital
+ microphones, normally supplied from the attached CODEC.
+ required:
+ - compatible
+
+ MIC2VDD:
+ description:
+ Initialisation data for the MIC2VDD supplies.
+ type: object
+ $ref: /schemas/regulator/regulator.yaml#
+ unevaluatedProperties: false
+ properties:
+ compatible:
+ enum:
+ - cirrus,lochnagar2-mic2vdd
+
+ cirrus,micbias-input:
+ description:
+ A property selecting which of the CODEC minicard micbias outputs
+ should be used.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 1
+ maximum: 4
+
+ MICBIAS2-supply:
+ description:
+ Regulator supplies for the MIC2VDD outputs, supplying the digital
+ microphones, normally supplied from the attached CODEC.
+ required:
+ - compatible
+
+ VDD1V8:
+ description:
+ Recommended fixed regulator for the VDD1V8 regulator, which supplies
+ the CODECs analog and 1.8V digital supplies.
+ type: object
+ $ref: /schemas/regulator/regulator.yaml#
+ unevaluatedProperties: false
+ properties:
+ compatible:
+ enum:
+ - regulator-fixed
+
+ regulator-min-microvolt:
+ const: 1800000
+
+ regulator-max-microvolt:
+ const: 1800000
+
+ vin-supply:
+ description:
+ Should be set to same supply as SYSVDD
+ required:
+ - compatible
+ - regulator-min-microvolt
+ - regulator-max-microvolt
+ - regulator-boot-on
+ - regulator-always-on
+ - vin-supply
+
+required:
+ - compatible
+ - reg
+ - reset-gpios
+ - lochnagar-clk
+ - pinctrl
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/lochnagar.h>
+ #include <dt-bindings/pinctrl/lochnagar.h>
+ i2c@e0004000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0xe0004000 0x1000>;
+
+ lochnagar: lochnagar@22 {
+ compatible = "cirrus,lochnagar2";
+ reg = <0x22>;
+
+ reset-gpios = <&gpio0 55 0>;
+ present-gpios = <&gpio0 60 0>;
+
+ lochnagarclk: lochnagar-clk {
+ compatible = "cirrus,lochnagar2-clk";
+
+ #clock-cells = <1>;
+ clocks = <&clkaudio>, <&clkpmic>;
+ clock-names = "ln-gf-mclk2", "ln-pmic-32k";
+
+ assigned-clocks = <&lochnagarclk LOCHNAGAR_CDC_MCLK1>,
+ <&lochnagarclk LOCHNAGAR_CDC_MCLK2>;
+ assigned-clock-parents = <&clkaudio>, <&clkpmic>;
+ };
+
+ clkpmic: lochnagar-pmic32k {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <32768>;
+ };
+
+ pinctrl {
+ compatible = "cirrus,lochnagar-pinctrl";
+
+ gpio-controller;
+ #gpio-cells = <2>;
+ gpio-ranges = <&lochnagar 0 0 LOCHNAGAR2_PIN_NUM_GPIOS>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinsettings>;
+
+ pinsettings: pin-settings {
+ ap2aif-pins {
+ input-enable;
+ groups = "gf-aif1";
+ function = "codec-aif3";
+ };
+ codec2aif-pins {
+ output-enable;
+ groups = "codec-aif3";
+ function = "gf-aif1";
+ };
+ };
+ };
+
+ lochnagar-sc {
+ compatible = "cirrus,lochnagar2-soundcard";
+
+ #sound-dai-cells = <1>;
+
+ clocks = <&lochnagarclk LOCHNAGAR_SOUNDCARD_MCLK>;
+ clock-names = "mclk";
+ };
+
+ lochnagar-hwmon {
+ compatible = "cirrus,lochnagar2-hwmon";
+ };
+
+ MIC1VDD {
+ compatible = "cirrus,lochnagar2-mic1vdd";
+
+ cirrus,micbias-input = <3>;
+ };
+
+ MICVDD {
+ compatible = "cirrus,lochnagar2-micvdd";
+
+ SYSVDD-supply = <&wallvdd>;
+
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ };
+
+ VDD1V8 {
+ compatible = "regulator-fixed";
+
+ regulator-name = "VDD1V8";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-boot-on;
+ regulator-always-on;
+
+ vin-supply = <&wallvdd>;
+ };
+ };
+ };