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