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-* Maxim MAX8998, National/TI LP3974 multi-function device
-
-The Maxim MAX8998 is a multi-function device which includes voltage/current
-regulators, real time clock, battery charging controller and several
-other sub-blocks. It is interfaced using an I2C interface. Each sub-block
-is addressed by the host system using different i2c slave address.
-
-PMIC sub-block
---------------
-
-The PMIC sub-block contains a number of voltage and current regulators,
-with controllable parameters and dynamic voltage scaling capability.
-In addition, it includes a real time clock and battery charging controller
-as well. It is accessible at I2C address 0x66.
-
-Required properties:
-- compatible: Should be one of the following:
- - "maxim,max8998" for Maxim MAX8998
- - "national,lp3974" or "ti,lp3974" for National/TI LP3974.
-- reg: Specifies the i2c slave address of the pmic block. It should be 0x66.
-
-Optional properties:
-- interrupts: Interrupt specifiers for two interrupt sources.
- - First interrupt specifier is for main interrupt.
- - Second interrupt specifier is for power-on/-off interrupt.
-- max8998,pmic-buck1-dvs-gpios: GPIO specifiers for two host gpios used
- for buck 1 dvs. The format of the gpio specifier depends on the gpio
- controller.
-- max8998,pmic-buck2-dvs-gpio: GPIO specifier for host gpio used
- for buck 2 dvs. The format of the gpio specifier depends on the gpio
- controller.
-- max8998,pmic-buck1-default-dvs-idx: Default voltage setting selected from
- the possible 4 options selectable by the dvs gpios. The value of this
- property should be 0, 1, 2 or 3. If not specified or out of range,
- a default value of 0 is taken.
-- max8998,pmic-buck2-default-dvs-idx: Default voltage setting selected from
- the possible 2 options selectable by the dvs gpios. The value of this
- property should be 0 or 1. If not specified or out of range, a default
- value of 0 is taken.
-- max8998,pmic-buck-voltage-lock: If present, disallows changing of
- preprogrammed buck dvfs voltages.
-
-Additional properties required if max8998,pmic-buck1-dvs-gpios is defined:
-- max8998,pmic-buck1-dvs-voltage: An array of 4 voltage values in microvolts
- for buck1 regulator that can be selected using dvs gpio.
-
-Additional properties required if max8998,pmic-buck2-dvs-gpio is defined:
-- max8998,pmic-buck2-dvs-voltage: An array of 2 voltage values in microvolts
- for buck2 regulator that can be selected using dvs gpio.
-
-Regulators: All the regulators of MAX8998 to be instantiated shall be
-listed in a child node named 'regulators'. Each regulator is represented
-by a child node of the 'regulators' node.
-
- regulator-name {
- /* standard regulator bindings here */
- };
-
-Following regulators of the MAX8998 PMIC block are supported. Note that
-the 'n' in regulator name, as in LDOn or BUCKn, represents the LDO or BUCK
-number as described in MAX8998 datasheet.
-
- - LDOn
- - valid values for n are 2 to 17
- - Example: LDO2, LDO10, LDO17
- - BUCKn
- - valid values for n are 1 to 4.
- - Example: BUCK1, BUCK2, BUCK3, BUCK4
-
- - ENVICHG: Battery Charging Current Monitor Output. This is a fixed
- voltage type regulator
-
- - ESAFEOUT1: (ldo19)
- - ESAFEOUT2: (ld020)
-
-Standard regulator bindings are used inside regulator subnodes. Check
- Documentation/devicetree/bindings/regulator/regulator.txt
-for more details.
-
-Example:
-
- pmic@66 {
- compatible = "maxim,max8998-pmic";
- reg = <0x66>;
- interrupt-parent = <&wakeup_eint>;
- interrupts = <4 0>, <3 0>;
-
- /* Buck 1 DVS settings */
- max8998,pmic-buck1-default-dvs-idx = <0>;
- max8998,pmic-buck1-dvs-gpios = <&gpx0 0 1 0 0>, /* SET1 */
- <&gpx0 1 1 0 0>; /* SET2 */
- max8998,pmic-buck1-dvs-voltage = <1350000>, <1300000>,
- <1000000>, <950000>;
-
- /* Buck 2 DVS settings */
- max8998,pmic-buck2-default-dvs-idx = <0>;
- max8998,pmic-buck2-dvs-gpio = <&gpx0 0 3 0 0>; /* SET3 */
- max8998,pmic-buck2-dvs-voltage = <1350000>, <1300000>;
-
- /* Regulators to instantiate */
- regulators {
- ldo2_reg: LDO2 {
- regulator-name = "VDD_ALIVE_1.1V";
- regulator-min-microvolt = <1100000>;
- regulator-max-microvolt = <1100000>;
- regulator-always-on;
- };
-
- buck1_reg: BUCK1 {
- regulator-name = "VDD_ARM_1.2V";
- regulator-min-microvolt = <950000>;
- regulator-max-microvolt = <1350000>;
- regulator-always-on;
- regulator-boot-on;
- };
- };
- };