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+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/maxim,max8997.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX8997 Power Management IC
+
+maintainers:
+ - Krzysztof Kozlowski <krzk@kernel.org>
+
+description: |
+ The Maxim MAX8997 is a Power Management IC which includes voltage and current
+ regulators, charger controller with fuel gauge, RTC, clock outputs, haptic
+ motor driver, flash LED driver and Micro-USB Interface Controller.
+
+ The binding here is not complete and describes only regulator and charger
+ controller parts.
+
+properties:
+ compatible:
+ const: maxim,max8997-pmic
+
+ charger-supply:
+ description: |
+ Regulator node for charging current.
+
+ interrupts:
+ items:
+ - description: irq1 interrupt
+ - description: alert interrupt
+
+ max8997,pmic-buck1-dvs-voltage:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ minItems: 1
+ maxItems: 8
+ description: |
+ A set of 8 voltage values in micro-volt (uV) units for buck1 when
+ changing voltage using GPIO DVS.
+ If none of max8997,pmic-buck[1/2/5]-uses-gpio-dvs optional property is
+ specified, the max8997,pmic-buck[1/2/5]-dvs-voltage property should
+ specify at least one voltage level (which would be a safe operating
+ voltage).
+
+ max8997,pmic-buck2-dvs-voltage:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ minItems: 1
+ maxItems: 8
+ description: |
+ A set of 8 voltage values in micro-volt (uV) units for buck2 when
+ changing voltage using GPIO DVS.
+ If none of max8997,pmic-buck[1/2/5]-uses-gpio-dvs optional property is
+ specified, the max8997,pmic-buck[1/2/5]-dvs-voltage property should
+ specify at least one voltage level (which would be a safe operating
+ voltage).
+
+ max8997,pmic-buck5-dvs-voltage:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ minItems: 1
+ maxItems: 8
+ description: |
+ A set of 8 voltage values in micro-volt (uV) units for buck5 when
+ changing voltage using GPIO DVS.
+ If none of max8997,pmic-buck[1/2/5]-uses-gpio-dvs optional property is
+ specified, the max8997,pmic-buck[1/2/5]-dvs-voltage property should
+ specify at least one voltage level (which would be a safe operating
+ voltage).
+
+ max8997,pmic-buck1-uses-gpio-dvs:
+ type: boolean
+ description: |
+ buck1 can be controlled by GPIO DVS.
+
+ max8997,pmic-buck2-uses-gpio-dvs:
+ type: boolean
+ description: |
+ buck2 can be controlled by GPIO DVS.
+
+ max8997,pmic-buck5-uses-gpio-dvs:
+ type: boolean
+ description: |
+ buck5 can be controlled by GPIO DVS.
+
+ max8997,pmic-buck125-default-dvs-idx:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 0
+ maximum: 7
+ default: 0
+ description: |
+ Default voltage setting selected from the possible 8 options selectable
+ by the dvs gpios. The value of this property should be between 0 and 7.
+ If not specified or if out of range, the default value of this property
+ is set to 0.
+
+ max8997,pmic-buck125-dvs-gpios:
+ minItems: 3
+ maxItems: 3
+ description: |
+ GPIO specifiers for three host gpio's used for DVS.
+
+ max8997,pmic-ignore-gpiodvs-side-effect:
+ type: boolean
+ description: |
+ When GPIO-DVS mode is used for multiple bucks, changing the voltage value
+ of one of the bucks may affect that of another buck, which is the side
+ effect of the change (set_voltage). Use this property to ignore such
+ side effects and change the voltage.
+
+ reg:
+ maxItems: 1
+
+ regulators:
+ type: object
+ additionalProperties: false
+ description:
+ List of child nodes that specify the regulators.
+
+ patternProperties:
+ # 1-18 and 21 LDOs
+ "^LDO([1-9]|1[0-8]|21)$":
+ type: object
+ $ref: regulator.yaml#
+ description:
+ Properties for single LDO regulator.
+
+ properties:
+ regulator-name: true
+
+ required:
+ - regulator-name
+
+ unevaluatedProperties: false
+
+ # 7 bucks
+ "^BUCK[1-7]$":
+ type: object
+ $ref: regulator.yaml#
+ description:
+ Properties for single BUCK regulator.
+
+ properties:
+ regulator-name: true
+
+ required:
+ - regulator-name
+
+ unevaluatedProperties: false
+
+ "^EN32KHZ_[AC]P$":
+ type: object
+ $ref: regulator.yaml#
+ description:
+ 32768 Hz clock output (modelled as regulator)
+
+ properties:
+ regulator-name: true
+ regulator-always-on: true
+ regulator-boot-on: true
+
+ required:
+ - regulator-name
+
+ additionalProperties: false
+
+ properties:
+ CHARGER:
+ type: object
+ $ref: regulator.yaml#
+ description: main battery charger current control
+
+ properties:
+ regulator-name: true
+
+ required:
+ - regulator-name
+
+ unevaluatedProperties: false
+
+ CHARGER_CV:
+ type: object
+ $ref: regulator.yaml#
+ description: main battery charger voltage control
+
+ properties:
+ regulator-name: true
+
+ required:
+ - regulator-name
+
+ unevaluatedProperties: false
+
+ CHARGER_TOPOFF:
+ type: object
+ $ref: regulator.yaml#
+ description: end of charge current threshold level
+
+ properties:
+ regulator-name: true
+
+ required:
+ - regulator-name
+
+ unevaluatedProperties: false
+
+ ENVICHG:
+ type: object
+ $ref: regulator.yaml#
+ description: |
+ Battery Charging Current Monitor Output. This is a fixed voltage type
+ regulator
+ properties:
+ regulator-name: true
+
+ required:
+ - regulator-name
+
+ unevaluatedProperties: false
+
+ ESAFEOUT1:
+ type: object
+ $ref: regulator.yaml#
+ description: LDO19
+
+ properties:
+ regulator-name: true
+
+ required:
+ - regulator-name
+
+ unevaluatedProperties: false
+
+ ESAFEOUT2:
+ type: object
+ $ref: regulator.yaml#
+ description: LDO20
+
+ properties:
+ regulator-name: true
+
+ required:
+ - regulator-name
+
+ unevaluatedProperties: false
+
+required:
+ - compatible
+ - max8997,pmic-buck1-dvs-voltage
+ - max8997,pmic-buck2-dvs-voltage
+ - max8997,pmic-buck5-dvs-voltage
+ - reg
+ - regulators
+
+dependencies:
+ max8997,pmic-buck1-uses-gpio-dvs: [ 'max8997,pmic-buck125-dvs-gpios' ]
+ max8997,pmic-buck2-uses-gpio-dvs: [ 'max8997,pmic-buck125-dvs-gpios' ]
+ max8997,pmic-buck5-uses-gpio-dvs: [ 'max8997,pmic-buck125-dvs-gpios' ]
+
+additionalProperties: false
+
+if:
+ anyOf:
+ - required:
+ - max8997,pmic-buck1-uses-gpio-dvs
+ - required:
+ - max8997,pmic-buck2-uses-gpio-dvs
+ - required:
+ - max8997,pmic-buck5-uses-gpio-dvs
+then:
+ properties:
+ max8997,pmic-buck1-dvs-voltage:
+ minItems: 8
+ maxItems: 8
+ max8997,pmic-buck2-dvs-voltage:
+ minItems: 8
+ maxItems: 8
+ max8997,pmic-buck5-dvs-voltage:
+ minItems: 8
+ maxItems: 8
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ pmic@66 {
+ compatible = "maxim,max8997-pmic";
+ reg = <0x66>;
+
+ interrupts-extended = <&gpx0 7 IRQ_TYPE_LEVEL_LOW>,
+ <&gpx2 3 IRQ_TYPE_EDGE_FALLING>;
+
+ max8997,pmic-buck1-uses-gpio-dvs;
+ max8997,pmic-buck2-uses-gpio-dvs;
+ max8997,pmic-buck5-uses-gpio-dvs;
+
+ max8997,pmic-ignore-gpiodvs-side-effect;
+ max8997,pmic-buck125-default-dvs-idx = <0>;
+
+ max8997,pmic-buck125-dvs-gpios = <&gpx0 5 GPIO_ACTIVE_HIGH>,
+ <&gpx0 6 GPIO_ACTIVE_HIGH>,
+ <&gpl0 0 GPIO_ACTIVE_HIGH>;
+
+ max8997,pmic-buck1-dvs-voltage = <1350000>, <1300000>,
+ <1250000>, <1200000>,
+ <1150000>, <1100000>,
+ <1000000>, <950000>;
+
+ max8997,pmic-buck2-dvs-voltage = <1100000>, <1000000>,
+ <950000>, <900000>,
+ <1100000>, <1000000>,
+ <950000>, <900000>;
+
+ max8997,pmic-buck5-dvs-voltage = <1200000>, <1200000>,
+ <1200000>, <1200000>,
+ <1200000>, <1200000>,
+ <1200000>, <1200000>;
+
+ pinctrl-0 = <&max8997_irq>, <&otg_gp>, <&usb_sel>;
+ pinctrl-names = "default";
+
+ charger-supply = <&charger_reg>;
+
+ regulators {
+ LDO1 {
+ regulator-name = "VADC_3.3V_C210";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-always-on;
+ };
+
+ LDO2 {
+ regulator-name = "VALIVE_1.1V_C210";
+ regulator-min-microvolt = <1100000>;
+ regulator-max-microvolt = <1100000>;
+ regulator-always-on;
+ };
+
+ BUCK1 {
+ regulator-name = "VARM_1.2V_C210";
+ regulator-min-microvolt = <65000>;
+ regulator-max-microvolt = <2225000>;
+ regulator-always-on;
+ };
+
+ // ...
+
+ BUCK7 {
+ regulator-name = "VCC_SUB_2.0V";
+ regulator-min-microvolt = <2000000>;
+ regulator-max-microvolt = <2000000>;
+ regulator-always-on;
+ };
+
+ ESAFEOUT1 {
+ regulator-name = "SAFEOUT1";
+ };
+
+ ESAFEOUT2 {
+ regulator-name = "SAFEOUT2";
+ regulator-boot-on;
+ };
+
+ EN32KHZ_AP {
+ regulator-name = "EN32KHZ_AP";
+ regulator-always-on;
+ };
+
+ EN32KHZ_CP {
+ regulator-name = "EN32KHZ_CP";
+ regulator-always-on;
+ };
+
+ CHARGER {
+ regulator-name = "CHARGER";
+ regulator-min-microamp = <200000>;
+ regulator-max-microamp = <950000>;
+ };
+
+ CHARGER_CV {
+ regulator-name = "CHARGER_CV";
+ regulator-min-microvolt = <4200000>;
+ regulator-max-microvolt = <4200000>;
+ regulator-always-on;
+ };
+
+ CHARGER_TOPOFF {
+ regulator-name = "CHARGER_TOPOFF";
+ regulator-min-microamp = <200000>;
+ regulator-max-microamp = <200000>;
+ regulator-always-on;
+ };
+ };
+ };
+ };
+
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ pmic@66 {
+ compatible = "maxim,max8997-pmic";
+ reg = <0x66>;
+
+ interrupt-parent = <&gpx0>;
+ interrupts = <4 IRQ_TYPE_LEVEL_LOW>,
+ <3 IRQ_TYPE_EDGE_FALLING>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&max8997_irq>;
+
+ max8997,pmic-buck1-dvs-voltage = <1350000>;
+ max8997,pmic-buck2-dvs-voltage = <1100000>;
+ max8997,pmic-buck5-dvs-voltage = <1200000>;
+
+ regulators {
+ LDO1 {
+ regulator-name = "VDD_ABB_3.3V";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ };
+
+ // ...
+
+ BUCK1 {
+ regulator-name = "VDD_ARM_1.2V";
+ regulator-min-microvolt = <950000>;
+ regulator-max-microvolt = <1350000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ // ...
+
+ EN32KHZ_AP {
+ regulator-name = "EN32KHZ_AP";
+ regulator-always-on;
+ };
+ };
+ };
+ };