Documentation/devicetree/bindings/regulator/max77686.txt

   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_NONE>;
  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         };