1Spreadtrum SC27XX PMICs Fuel Gauge Unit Power Supply Bindings 2 3Required 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 21Example: 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 }; 60