221 lines
7.9 KiB
Plaintext
221 lines
7.9 KiB
Plaintext
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Battery Profile Data
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Battery Data is a collection of battery profile data made available to
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the QPNP Charger and BMS drivers via device tree.
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qcom,battery-data node required properties:
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- qcom,rpull-up-kohm : The vadc pullup resistor's resistance value in kOhms.
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- qcom,vref-batt-therm-uv : The vadc voltage used to make readings.
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For Qualcomm VADCs this should be 1800000uV.
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qcom,battery-data node optional properties:
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- qcom,batt-id-range-pct : The area of variation between upper and lower bound
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for which a given battery ID resistance is valid. This
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value is expressed as a percentage of the specified kohm
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resistance provided by qcom,batt-id-kohm.
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qcom,battery-data can also include any number of children nodes. These children
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nodes will be treated as battery profile data nodes.
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Profile data node required properties:
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- qcom,fcc-mah : Full charge count of the battery in milliamp-hours
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- qcom,default-rbatt-mohm : The nominal battery resistance value
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- qcom,rbatt-capacitive-mohm : The capacitive resistance of the battery.
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- qcom,flat-ocv-threshold-uv : The threshold under which the battery can be
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considered to be in the flat portion of the discharge
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curve.
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- qcom,max-voltage-uv : The maximum rated voltage of the battery
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- qcom,v-cutoff-uv : The cutoff voltage of the battery at which the device
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should shutdown gracefully.
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- qcom,chg-term-ua : The termination charging current of the battery.
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- qcom,batt-id-kohm : The battery id resistance of the battery. It can be
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used as an array which could support multiple IDs for one battery
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module when the ID resistance of some battery modules goes across
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several ranges.
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- qcom,battery-type : A string indicating the type of battery.
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- qcom,fg-profile-data : An array of hexadecimal values used to configure more
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complex fuel gauge peripherals which have a large amount
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of coefficients used in hardware state machines and thus
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influencing the final output of the state of charge read
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by software.
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Profile data node optional properties:
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- qcom,chg-rslow-comp-c1 : A constant for rslow compensation in the fuel gauge.
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This will be provided by the profiling tool for
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additional fuel gauge accuracy during charging.
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- qcom,chg-rslow-comp-c2 : A constant for rslow compensation in the fuel gauge.
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This will be provided by the profiling tool for
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additional fuel gauge accuracy during charging.
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- qcom,chg-rslow-comp-thr : A constant for rslow compensation in the fuel gauge.
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This will be provided by the profiling tool for
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additional fuel gauge accuracy during charging.
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- qcom,chg-rs-to-rslow: A constant for rslow compensation in the fuel gauge.
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This will be provided by the profiling tool for
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additional fuel gauge accuracy during charging.
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- qcom,fastchg-current-ma: Specifies the maximum fastcharge current.
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- qcom,fg-cc-cv-threshold-mv: Voltage threshold in mV for transition from constant
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charge (CC) to constant voltage (CV). This value should
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be 10 mV less than the float voltage.
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This property should only be specified if
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"qcom,autoadjust-vfloat" property is specified in the
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charger driver to ensure a proper operation.
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- qcom,thermal-coefficients: Byte array of thermal coefficients for reading
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battery thermistor. This should be exactly 6 bytes
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in length.
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Example: [01 02 03 04 05 06]
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Profile data node required subnodes:
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- qcom,fcc-temp-lut : An 1-dimensional lookup table node that encodes
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temperature to fcc lookup. The units for this lookup
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table should be degrees celsius to milliamp-hours.
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- qcom,pc-temp-ocv-lut : A 2-dimensional lookup table node that encodes
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temperature and percent charge to open circuit voltage
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lookup. The units for this lookup table should be
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degrees celsius and percent to millivolts.
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- qcom,rbatt-sf-lut : A 2-dimentional lookup table node that encodes
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temperature and percent charge to battery internal
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resistance lookup. The units for this lookup table
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should be degrees celsius and percent to milliohms.
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Profile data node optional subnodes:
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- qcom,ibat-acc-luit: A 2-dimentional lookup table that encodes temperature
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and battery current to battery ACC (apparent charge
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capacity). The units for this lookup table should be
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temperature in degrees celsius, ibat in milli-amps
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and ACC in milli-ampere-hour.
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Lookup table required properties:
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- qcom,lut-col-legend : An array that encodes the legend of the lookup table's
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columns. The length of this array will determine the
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lookup table's width.
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- qcom,lut-data : An array that encodes the lookup table's data. The size of this
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array should be equal to the size of qcom,lut-col-legend
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multiplied by 1 if it's a 1-dimensional table, or
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the size of qcom,lut-row-legend if it's a 2-dimensional
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table. The data should be in a flattened row-major
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representation.
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Lookup table optional properties:
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- qcom,lut-row-legend : An array that encodes the legend of the lookup table's rows.
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If this property exists, then it is assumed that the
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lookup table is a 2-dimensional table.
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Example:
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In msm8974-mtp.dtsi:
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mtp_batterydata: qcom,battery-data {
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qcom,rpull-up-kohm = <100>;
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qcom,vref-batt-therm-uv = <1800000>;
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/include/ "batterydata-palladium.dtsi"
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/include/ "batterydata-mtp-3000mah.dtsi"
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};
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&pm8941_bms {
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qcom,battery-data = <&mtp_batterydata>;
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};
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In batterydata-palladium.dtsi:
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qcom,palladium-batterydata {
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qcom,fcc-mah = <1500>;
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qcom,default-rbatt-mohm = <236>;
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qcom,rbatt-capacitive-mohm = <50>;
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qcom,flat-ocv-threshold-uv = <3800000>;
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qcom,max-voltage-uv = <4200000>;
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qcom,v-cutoff-uv = <3400000>;
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qcom,chg-term-ua = <100000>;
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qcom,batt-id-kohm = <75>;
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qcom,battery-type = "palladium_1500mah";
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qcom,fcc-temp-lut {
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qcom,lut-col-legend = <(-20) 0 25 40 65>;
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qcom,lut-data = <1492 1492 1493 1483 1502>;
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};
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qcom,pc-temp-ocv-lut {
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qcom,lut-col-legend = <(-20) 0 25 40 65>;
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qcom,lut-row-legend = <100 95 90 85 80 75 70>,
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<65 60 55 50 45 40 35>,
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<30 25 20 15 10 9 8>,
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<7 6 5 4 3 2 1 0>;
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qcom,lut-data = <4173 4167 4163 4156 4154>,
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<4104 4107 4108 4102 4104>,
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<4057 4072 4069 4061 4060>,
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<3973 4009 4019 4016 4020>,
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<3932 3959 3981 3982 3983>,
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<3899 3928 3954 3950 3950>,
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<3868 3895 3925 3921 3920>,
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<3837 3866 3898 3894 3892>,
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<3812 3841 3853 3856 3862>,
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<3794 3818 3825 3823 3822>,
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<3780 3799 3804 3804 3803>,
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<3768 3787 3790 3788 3788>,
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<3757 3779 3778 3775 3776>,
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<3747 3772 3771 3766 3765>,
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<3736 3763 3766 3760 3746>,
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<3725 3749 3756 3747 3729>,
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<3714 3718 3734 3724 3706>,
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<3701 3703 3696 3689 3668>,
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<3675 3695 3682 3675 3662>,
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<3670 3691 3680 3673 3661>,
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<3661 3686 3679 3672 3656>,
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<3649 3680 3676 3669 3641>,
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<3633 3669 3667 3655 3606>,
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<3610 3647 3640 3620 3560>,
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<3580 3607 3596 3572 3501>,
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<3533 3548 3537 3512 3425>,
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<3457 3468 3459 3429 3324>,
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<3328 3348 3340 3297 3172>,
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<3000 3000 3000 3000 3000>;
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};
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qcom,rbatt-sf-lut {
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qcom,lut-col-legend = <(-20) 0 25 40 65>;
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qcom,lut-row-legend = <100 95 90 85 80 75 70>,
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<65 60 55 50 45 40 35>,
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<30 25 20 15 10 9 8>,
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<7 6 5 4 3 2 1 0>;
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qcom,lut-data = <357 187 100 91 91>,
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<400 208 105 94 94>,
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<390 204 106 95 96>,
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<391 201 108 98 98>,
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<391 202 110 98 100>,
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<390 200 110 99 102>,
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<389 200 110 99 102>,
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<393 202 101 93 100>,
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<407 205 99 89 94>,
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<428 208 100 91 96>,
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<455 212 102 92 98>,
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<495 220 104 93 101>,
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<561 232 107 95 102>,
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<634 245 112 98 98>,
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<714 258 114 98 98>,
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<791 266 114 97 100>,
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<871 289 108 95 97>,
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<973 340 124 108 105>,
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<489 241 109 96 99>,
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<511 246 110 96 99>,
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<534 252 111 95 98>,
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<579 263 112 96 96>,
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<636 276 111 95 97>,
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<730 294 109 96 99>,
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<868 328 112 98 104>,
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<1089 374 119 101 115>,
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<1559 457 128 105 213>,
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<12886 1026 637 422 3269>,
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<170899 127211 98968 88907 77102>;
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};
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qcom,ibat-acc-lut {
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qcom,lut-col-legend = <(-20) 0 25>;
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qcom,lut-row-legend = <0 250 500 1000>;
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qcom,lut-data = <1470 1470 1473>,
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<1406 1406 1430>,
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<1247 1247 1414>,
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<764 764 1338>;
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};
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};
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