kernel/Documentation/devicetree/bindings/mfd/max14577.txt

   1 Maxim MAX14577/77836 Multi-Function Device
   2
   3 MAX14577 is a Multi-Function Device with Micro-USB Interface Circuit, Li+
   4 Battery Charger and SFOUT LDO output for powering USB devices. It is
   5 interfaced to host controller using I2C.
   6
   7 MAX77836 additionally contains PMIC (with two LDO regulators) and Fuel Gauge.
   8
   9
  10 Required properties:
  11 - compatible : Must be "maxim,max14577" or "maxim,max77836".
  12 - reg : I2C slave address for the max14577 chip (0x25 for max14577/max77836)
  13 - interrupts : IRQ line for the chip.
  14 - interrupt-parent :  The parent interrupt controller.
  15
  16
  17 Required nodes:
  18  - charger :
  19         Node for configuring the charger driver.
  20         Required properties:
  21                 - compatible : "maxim,max14577-charger"
  22                         or "maxim,max77836-charger"
  23                 - maxim,fast-charge-uamp : Current in uA for Fast Charge;
  24                         Valid values:
  25                         - for max14577: 90000 - 950000;
  26                         - for max77836: 45000 - 475000;
  27                 - maxim,eoc-uamp : Current in uA for End-Of-Charge mode;
  28                         Valid values:
  29                         - for max14577: 50000 - 200000;
  30                         - for max77836: 5000 - 100000;
  31                 - maxim,ovp-uvolt : OverVoltage Protection Threshold in uV;
  32                         In an overvoltage condition, INT asserts and charging
  33                         stops. Valid values:
  34                         - 6000000, 6500000, 7000000, 7500000;
  35                 - maxim,constant-uvolt : Battery Constant Voltage in uV;
  36                         Valid values:
  37                         - 4000000 - 4280000 (step by 20000);
  38                         - 4350000;
  39
  40
  41 Optional nodes:
  42 - max14577-muic/max77836-muic :
  43         Node used only by extcon consumers.
  44         Required properties:
  45                 - compatible : "maxim,max14577-muic" or "maxim,max77836-muic"
  46
  47 - regulators :
  48         Required properties:
  49                 - compatible : "maxim,max14577-regulator"
  50                         or "maxim,max77836-regulator"
  51
  52         May contain a sub-node per regulator from the list below. Each
  53         sub-node should contain the constraints and initialization information
  54         for that regulator. See regulator.txt for a description of standard
  55         properties for these sub-nodes.
  56
  57         List of valid regulator names:
  58         - for max14577: CHARGER, SAFEOUT.
  59         - for max77836: CHARGER, SAFEOUT, LDO1, LDO2.
  60
  61         The SAFEOUT is a fixed voltage regulator so there is no need to specify
  62         voltages for it.
  63
  64
  65 Example:
  66
  67 #include <dt-bindings/interrupt-controller/irq.h>
  68
  69 max14577@25 {
  70         compatible = "maxim,max14577";
  71         reg = <0x25>;
  72         interrupt-parent = <&gpx1>;
  73         interrupts = <5 IRQ_TYPE_NONE>;
  74
  75         muic: max14577-muic {
  76                 compatible = "maxim,max14577-muic";
  77         };
  78
  79         regulators {
  80                 compatible = "maxim,max14577-regulator";
  81
  82                 SAFEOUT {
  83                         regulator-name = "SAFEOUT";
  84                 };
  85                 CHARGER {
  86                         regulator-name = "CHARGER";
  87                         regulator-min-microamp = <90000>;
  88                         regulator-max-microamp = <950000>;
  89                         regulator-boot-on;
  90                 };
  91         };
  92
  93         charger {
  94                 compatible = "maxim,max14577-charger";
  95
  96                 maxim,constant-uvolt = <4350000>;
  97                 maxim,fast-charge-uamp = <450000>;
  98                 maxim,eoc-uamp = <50000>;
  99                 maxim,ovp-uvolt = <6500000>;
 100         };
 101 };
 102
 103
 104 max77836@25 {
 105         compatible = "maxim,max77836";
 106         reg = <0x25>;
 107         interrupt-parent = <&gpx1>;
 108         interrupts = <5 IRQ_TYPE_NONE>;
 109
 110         muic: max77836-muic {
 111                 compatible = "maxim,max77836-muic";
 112         };
 113
 114         regulators {
 115                 compatible = "maxim,max77836-regulator";
 116
 117                 SAFEOUT {
 118                         regulator-name = "SAFEOUT";
 119                 };
 120                 CHARGER {
 121                         regulator-name = "CHARGER";
 122                         regulator-min-microamp = <90000>;
 123                         regulator-max-microamp = <950000>;
 124                         regulator-boot-on;
 125                 };
 126                 LDO1 {
 127                         regulator-name = "LDO1";
 128                         regulator-min-microvolt = <2700000>;
 129                         regulator-max-microvolt = <2700000>;
 130                 };
 131                 LDO2 {
 132                         regulator-name = "LDO2";
 133                         regulator-min-microvolt = <800000>;
 134                         regulator-max-microvolt = <3950000>;
 135                 };
 136         };
 137
 138         charger {
 139                 compatible = "maxim,max77836-charger";
 140
 141                 maxim,constant-uvolt = <4350000>;
 142                 maxim,fast-charge-uamp = <225000>;
 143                 maxim,eoc-uamp = <7500>;
 144                 maxim,ovp-uvolt = <6500000>;
 145         };
 146 };