Documentation/devicetree/bindings/power/supply/sc27xx-fg.txt

   1 Spreadtrum SC27XX PMICs Fuel Gauge Unit Power Supply Bindings
   2
   3 Required properties:
   4 - compatible: Should be one of the following:
   5   "sprd,sc2720-fgu",
   6   "sprd,sc2721-fgu",
   7   "sprd,sc2723-fgu",
   8   "sprd,sc2730-fgu",
   9   "sprd,sc2731-fgu".
  10 - reg: The address offset of fuel gauge unit.
  11 - battery-detect-gpios: GPIO for battery detection.
  12 - io-channels: Specify the IIO ADC channels to get temperature and charge voltage.
  13 - io-channel-names: Should be "bat-temp" or "charge-vol".
  14 - nvmem-cells: A phandle to the calibration cells provided by eFuse device.
  15 - nvmem-cell-names: Should be "fgu_calib".
  16 - sprd,calib-resistance-micro-ohms: Specify the real resistance of coulomb counter
  17   chip in micro Ohms.
  18 - monitored-battery: Phandle of battery characteristics devicetree node.
  19   See Documentation/devicetree/bindings/power/supply/battery.txt
  20
  21 Example:
  22
  23         bat: battery {
  24                 compatible = "simple-battery";
  25                 charge-full-design-microamp-hours = <1900000>;
  26                 constant-charge-voltage-max-microvolt = <4350000>;
  27                 ocv-capacity-celsius = <20>;
  28                 ocv-capacity-table-0 = <4185000 100>, <4113000 95>, <4066000 90>,
  29                                         <4022000 85>, <3983000 80>, <3949000 75>,
  30                                         <3917000 70>, <3889000 65>, <3864000 60>,
  31                                         <3835000 55>, <3805000 50>, <3787000 45>,
  32                                         <3777000 40>, <3773000 35>, <3770000 30>,
  33                                         <3765000 25>, <3752000 20>, <3724000 15>,
  34                                         <3680000 10>, <3605000 5>, <3400000 0>;
  35                 ......
  36         };
  37
  38         sc2731_pmic: pmic@0 {
  39                 compatible = "sprd,sc2731";
  40                 reg = <0>;
  41                 spi-max-frequency = <26000000>;
  42                 interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
  43                 interrupt-controller;
  44                 #interrupt-cells = <2>;
  45                 #address-cells = <1>;
  46                 #size-cells = <0>;
  47
  48                 fgu@a00 {
  49                         compatible = "sprd,sc2731-fgu";
  50                         reg = <0xa00>;
  51                         battery-detect-gpios = <&pmic_eic 9 GPIO_ACTIVE_HIGH>;
  52                         io-channels = <&pmic_adc 5>, <&pmic_adc 14>;
  53                         io-channel-names = "bat-temp", "charge-vol";
  54                         nvmem-cells = <&fgu_calib>;
  55                         nvmem-cell-names = "fgu_calib";
  56                         monitored-battery = <&bat>;
  57                         sprd,calib-resistance-micro-ohms = <21500>;
  58                 };
  59         };