max77686.txt

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    1 Binding for Maxim MAX77686 regulators
    2 
    3 This is a part of the device tree bindings of MAX77686 multi-function device.
    4 More information can be found in ../mfd/max77686.txt file.
    5 
    6 The MAX77686 PMIC has 9 high-efficiency Buck and 26 Low-DropOut (LDO)
    7 regulators that can be controlled over I2C.
    8 
    9 Following properties should be present in main device node of the MFD chip.
   10 
   11 Optional 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
   22 to 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 
   41 Example:
   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         };

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sys/contrib/device-tree/Bindings/regulator/max77686.txt