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 - monitored-battery: Phandle of battery characteristics devicetree node.
  17   See Documentation/devicetree/bindings/power/supply/battery.txt
  18
  19 Example:
  20
  21         bat: battery {
  22                 compatible = "simple-battery";
  23                 charge-full-design-microamp-hours = <1900000>;
  24                 constant-charge-voltage-max-microvolt = <4350000>;
  25                 ocv-capacity-celsius = <20>;
  26                 ocv-capacity-table-0 = <4185000 100>, <4113000 95>, <4066000 90>,
  27                                         <4022000 85>, <3983000 80>, <3949000 75>,
  28                                         <3917000 70>, <3889000 65>, <3864000 60>,
  29                                         <3835000 55>, <3805000 50>, <3787000 45>,
  30                                         <3777000 40>, <3773000 35>, <3770000 30>,
  31                                         <3765000 25>, <3752000 20>, <3724000 15>,
  32                                         <3680000 10>, <3605000 5>, <3400000 0>;
  33                 ......
  34         };
  35
  36         sc2731_pmic: pmic@0 {
  37                 compatible = "sprd,sc2731";
  38                 reg = <0>;
  39                 spi-max-frequency = <26000000>;
  40                 interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
  41                 interrupt-controller;
  42                 #interrupt-cells = <2>;
  43                 #address-cells = <1>;
  44                 #size-cells = <0>;
  45
  46                 fgu@a00 {
  47                         compatible = "sprd,sc2731-fgu";
  48                         reg = <0xa00>;
  49                         battery-detect-gpios = <&pmic_eic 9 GPIO_ACTIVE_HIGH>;
  50                         io-channels = <&pmic_adc 5>, <&pmic_adc 14>;
  51                         io-channel-names = "bat-temp", "charge-vol";
  52                         nvmem-cells = <&fgu_calib>;
  53                         nvmem-cell-names = "fgu_calib";
  54                         monitored-battery = <&bat>;
  55                 };
  56         };