Binding for Maxim MAX77686 regulators This is a part of the device tree bindings of MAX77686 multi-function device. More information can be found in ../mfd/max77686.txt file. The MAX77686 PMIC has 9 high-efficiency Buck and 26 Low-DropOut (LDO) regulators that can be controlled over I2C. Following properties should be present in main device node of the MFD chip. Optional node: - voltage-regulators : The regulators of max77686 have to be instantiated under subnode named "voltage-regulators" using the following format. regulator_name { regulator-compatible = LDOn/BUCKn standard regulator constraints.... }; refer Documentation/devicetree/bindings/regulator/regulator.txt The regulator node's name should be initialized with a string to get matched with their hardware counterparts as follow: -LDOn : for LDOs, where n can lie in range 1 to 26. example: LDO1, LDO2, LDO26. -BUCKn : for BUCKs, where n can lie in range 1 to 9. example: BUCK1, BUCK5, BUCK9. Regulators which can be turned off during system suspend: -LDOn : 2, 6-8, 10-12, 14-16, -BUCKn : 1-4. Use standard regulator bindings for it ('regulator-off-in-suspend'). LDO20, LDO21, LDO22, BUCK8 and BUCK9 can be configured to GPIO enable control. To turn this feature on this property must be added to the regulator sub-node: - maxim,ena-gpios : one GPIO specifier enable control (the gpio flags are actually ignored and always ACTIVE_HIGH is used) Example: max77686: pmic@09 { compatible = "maxim,max77686"; interrupt-parent = <&wakeup_eint>; interrupts = <26 IRQ_TYPE_NONE>; reg = <0x09>; voltage-regulators { ldo11_reg: LDO11 { regulator-name = "vdd_ldo11"; regulator-min-microvolt = <1900000>; regulator-max-microvolt = <1900000>; regulator-always-on; }; buck1_reg: BUCK1 { regulator-name = "vdd_mif"; regulator-min-microvolt = <950000>; regulator-max-microvolt = <1300000>; regulator-always-on; regulator-boot-on; }; buck9_reg: BUCK9 { regulator-name = "CAM_ISP_CORE_1.2V"; regulator-min-microvolt = <1000000>; regulator-max-microvolt = <1200000>; maxim,ena-gpios = <&gpm0 3 GPIO_ACTIVE_HIGH>; }; };