114 lines
4.7 KiB
Plaintext
114 lines
4.7 KiB
Plaintext
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Summit smb1351 battery charger
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SMB1351 is a single-cell battery charger. It can charge
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the battery and power the system via the USB/AC adapter input.
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The smb1351 interface is via I2C bus.
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Required Properties:
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- compatible Must be "qcom,smb1351-charger".
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- reg The device 7-bit I2C address.
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Required Properties for standalone charger:
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- regulator-name A string used as a descriptive name for OTG regulator.
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- pinctrl-names The state name of the pin configuration. Only
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support "default".
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- pinctrl-0 The phandle of the pin configuration node in
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pinctrl for smb_int_pin.
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Optional Properties:
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- interrupts This indicates the IRQ number of the GPIO
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connected to the STAT pin.
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- qcom,fastchg-current-max-ma Fast Charging current in mA. Supported range is
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from 1000mA to 4500mA.
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- qcom,chg-autonomous-mode This is a bool property and it indicates that the
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charger is configured for autonomous operation and
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does not require any software configuration.
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- qcom,disable-apsd This is a bool property which disables automatic
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power source detection (APSD). If this is set
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charger detection is done by DCIN UV irq.
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- qcom,charging-disabled This is a bool property which disables charging.
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- qcom,using-pmic-therm This property indicates thermal pin connected to pmic or smb.
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- qcom,bms-psy-name This is a string and it points to the bms
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power supply name.
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- qcom,iterm-ma Specifies the termination current to indicate end-of-charge.
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Possible values in mA - 70, 100, 200, 300, 400, 500, 600, 700.
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- qcom,iterm-disabled Disables the termination current feature. This is a bool
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property.
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- qcom,float-voltage-mv Float Voltage in mV - the maximum voltage up to which
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the battery is charged. Supported range 3500mV to 4500mV
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- qcom,recharge-mv Recharge threshold in mV - the offset from the float-volatge
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as which the charger restarts charging. Possible
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values are 50mV and 100mV.
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- qcom,recharge-disabled Boolean value which disables the auto-recharge.
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- qcom,bms-controlled-charging This property enables BMS to control EOC and
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recharge. BMS and charger communicates with each
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other via power_supply framework. This
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property should be used with 'qcom,iterm-disabled'
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to ensure EOC detection in charger is disabled.
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- qcom,force-hvdcp-2p0 Boolean value which allows to force hvdcp working on 2.0 mode.
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- qcom,parallel-charger Boolean value which enables the parallel charger.
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- qcom,chg-vadc Corresponding VADC device's phandle.
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- qcom,chg-adc_tm phandle to the corresponding VADC device to read the ADC channels.
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- qcom,batt-cold-decidegc Cold battery temperature in decidegC.
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- qcom,batt-hot-decidegc Hot battery temperature in decidegC.
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- qcom,batt-missing-decidegc This is a property indicating battery missing temperature, if
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higher than it, battery should exist.
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- qcom,batt-warm-decidegc: Warm battery temperature in decidegC. After hitting this threshold,
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"qcom,warm-bat-ma" defines maximum charging current and
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"qcom,warm-bat-mv" defines maximum target voltage.
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- qcom,batt-cool-decidegc: Cool battery temperature in decidegC. After hitting this threshold,
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"qcom,cool-bat-ma" defines maximum charging current and
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"qcom,cool-bat-mv" defines maximum target voltage.
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- qcom,batt-warm-ma: Maximum warm battery charge current in milli-amps.
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- qcom,batt-cool-ma: Maximum cool battery charge current in milli-amps.
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- qcom,batt-warm-mv: Maximum warm battery target voltage in milli-volts.
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- qcom,batt-cool-mv: Maximum cool battery target voltage in milli-volts.
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- qcom,parallel-en-pin-polarity Specify the polarity of enable signal controlled
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via pin in a parallel-charger configuration.
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0 - Active low and 1 - Active high.
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If not specified the default value is active-low.
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Example for standalone charger:
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&i2c_4 {
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smb1351_otg_supply: smb1351-charger@57 {
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compatible = "qcom,smb1351-charger";
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reg = <0x57>;
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interrupt-parent = <&msm_gpio>;
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interrupts = <62 2>;
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pinctrl-names = "default";
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pinctrl-0 = <&smb_int_default>;
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qcom,float-voltage-mv = <4350>;
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qcom,iterm-ma = <100>;
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qcom,recharge-mv = <100>;
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qcom,bms-psy-name = "bms";
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regulator-name = "smb1351_otg_vreg";
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qcom,using-pmic-therm;
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qcom,chg-adc_tm = <&pm8916_adc_tm>;
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qcom,chg-vadc = <&pm8916_vadc>;
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qcom,batt-hot-decidegc = <550>;
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qcom,batt-cold-decidegc = <0>;
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qcom,batt-missing-decidegc = <(-200)>;
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qcom,batt-warm-decidegc = <500>;
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qcom,batt-cool-decidegc = <50>;
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qcom,batt-warm-ma = <350>;
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qcom,batt-cool-ma = <350>;
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qcom,batt-warm-mv = <4200>;
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qcom,batt-cool-mv = <4200>;
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};
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};
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Example for parallel charger:
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&i2c_11 {
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smb1351-charger@1d {
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compatible = "qcom,smb1351-charger";
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reg = <0x1d>;
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qcom,parallel-charger;
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qcom,float-voltage-mv = <4400>;
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qcom,recharge-mv = <100>;
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};
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};
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