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