1Binding for Maxim MAX77686 regulators 2 3This is a part of the device tree bindings of MAX77686 multi-function device. 4More information can be found in ../mfd/max77686.txt file. 5 6The MAX77686 PMIC has 9 high-efficiency Buck and 26 Low-DropOut (LDO) 7regulators that can be controlled over I2C. 8 9Following properties should be present in main device node of the MFD chip. 10 11Optional node: 12- voltage-regulators : The regulators of max77686 have to be instantiated 13 under subnode named "voltage-regulators" using the following format. 14 15 regulator_name { 16 regulator-compatible = LDOn/BUCKn 17 standard regulator constraints.... 18 }; 19 refer Documentation/devicetree/bindings/regulator/regulator.txt 20 21 The regulator node's name should be initialized with a string 22to get matched with their hardware counterparts as follow: 23 24 -LDOn : for LDOs, where n can lie in range 1 to 26. 25 example: LDO1, LDO2, LDO26. 26 -BUCKn : for BUCKs, where n can lie in range 1 to 9. 27 example: BUCK1, BUCK5, BUCK9. 28 29 Regulators which can be turned off during system suspend: 30 -LDOn : 2, 6-8, 10-12, 14-16, 31 -BUCKn : 1-4. 32 Use standard regulator bindings for it ('regulator-off-in-suspend'). 33 34 LDO20, LDO21, LDO22, BUCK8 and BUCK9 can be configured to GPIO enable 35 control. To turn this feature on this property must be added to the regulator 36 sub-node: 37 - maxim,ena-gpios : one GPIO specifier enable control (the gpio 38 flags are actually ignored and always 39 ACTIVE_HIGH is used) 40 41Example: 42 43 max77686: pmic@9 { 44 compatible = "maxim,max77686"; 45 interrupt-parent = <&wakeup_eint>; 46 interrupts = <26 IRQ_TYPE_LEVEL_LOW>; 47 reg = <0x09>; 48 49 voltage-regulators { 50 ldo11_reg: LDO11 { 51 regulator-name = "vdd_ldo11"; 52 regulator-min-microvolt = <1900000>; 53 regulator-max-microvolt = <1900000>; 54 regulator-always-on; 55 }; 56 57 buck1_reg: BUCK1 { 58 regulator-name = "vdd_mif"; 59 regulator-min-microvolt = <950000>; 60 regulator-max-microvolt = <1300000>; 61 regulator-always-on; 62 regulator-boot-on; 63 }; 64 65 buck9_reg: BUCK9 { 66 regulator-name = "CAM_ISP_CORE_1.2V"; 67 regulator-min-microvolt = <1000000>; 68 regulator-max-microvolt = <1200000>; 69 maxim,ena-gpios = <&gpm0 3 GPIO_ACTIVE_HIGH>; 70 }; 71 }; 72