Documentation/devicetree/bindings/mfd/max77686.txt

   1 Maxim MAX77686 multi-function device
   2
   3 MAX77686 is a Multifunction device with PMIC, RTC and Charger on chip. It is
   4 interfaced to host controller using i2c interface. PMIC and Charger submodules
   5 are addressed using same i2c slave address whereas RTC submodule uses
   6 different i2c slave address,presently for which we are statically creating i2c
   7 client while probing.This document describes the binding for mfd device and
   8 PMIC submodule.
   9
  10 Binding for the built-in 32k clock generator block is defined separately
  11 in bindings/clk/maxim,max77686.txt file.
  12
  13 Required properties:
  14 - compatible : Must be "maxim,max77686";
  15 - reg : Specifies the i2c slave address of PMIC block.
  16 - interrupts : This i2c device has an IRQ line connected to the main SoC.
  17 - interrupt-parent : The parent interrupt controller.
  18
  19 Optional node:
  20 - voltage-regulators : The regulators of max77686 have to be instantiated
  21   under subnode named "voltage-regulators" using the following format.
  22
  23         regulator_name {
  24                 regulator-compatible = LDOn/BUCKn
  25                 standard regulator constraints....
  26         };
  27         refer Documentation/devicetree/bindings/regulator/regulator.txt
  28
  29   The regulator node's name should be initialized with a string
  30 to get matched with their hardware counterparts as follow:
  31
  32         -LDOn   :       for LDOs, where n can lie in range 1 to 26.
  33                         example: LDO1, LDO2, LDO26.
  34         -BUCKn  :       for BUCKs, where n can lie in range 1 to 9.
  35                         example: BUCK1, BUCK5, BUCK9.
  36
  37   Regulators which can be turned off during system suspend:
  38         -LDOn   :       2, 6-8, 10-12, 14-16,
  39         -BUCKn  :       1-4.
  40   Use standard regulator bindings for it ('regulator-off-in-suspend').
  41
  42   LDO20, LDO21, LDO22, BUCK8 and BUCK9 can be configured to GPIO enable
  43   control. To turn this feature on this property must be added to the regulator
  44   sub-node:
  45         - maxim,ena-gpios :     one GPIO specifier enable control (the gpio
  46                                 flags are actually ignored and always
  47                                 ACTIVE_HIGH is used)
  48
  49 Example:
  50
  51         max77686@09 {
  52                 compatible = "maxim,max77686";
  53                 interrupt-parent = <&wakeup_eint>;
  54                 interrupts = <26 0>;
  55                 reg = <0x09>;
  56
  57                 voltage-regulators {
  58                         ldo11_reg: LDO11 {
  59                                 regulator-name = "vdd_ldo11";
  60                                 regulator-min-microvolt = <1900000>;
  61                                 regulator-max-microvolt = <1900000>;
  62                                 regulator-always-on;
  63                         };
  64
  65                         buck1_reg: BUCK1 {
  66                                 regulator-name = "vdd_mif";
  67                                 regulator-min-microvolt = <950000>;
  68                                 regulator-max-microvolt = <1300000>;
  69                                 regulator-always-on;
  70                                 regulator-boot-on;
  71                         };
  72
  73                         buck9_reg: BUCK9 {
  74                                 regulator-name = "CAM_ISP_CORE_1.2V";
  75                                 regulator-min-microvolt = <1000000>;
  76                                 regulator-max-microvolt = <1200000>;
  77                                 maxim,ena-gpios = <&gpm0 3 GPIO_ACTIVE_HIGH>;
  78                         };
  79         }