sc27xx-fg.txt

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    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         };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/power/supply/sc27xx-fg.txt

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sys/contrib/device-tree/Bindings/power/supply/sc27xx-fg.txt