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SubjectRe: [PATCH v4 2/3] dt-bindings: power: supply: qcom_bms: Add bindings
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On 13 April 2018 17:35:27 BST, Rob Herring <robh@kernel.org> wrote:
>On Sat, Apr 07, 2018 at 06:57:45PM +0100, Craig Tatlor wrote:
>> Add bindings for the Qualcomm Battery Monitoring system.
>>
>> Signed-off-by: Craig Tatlor <ctatlor97@gmail.com>
>> ---
>> .../bindings/power/supply/qcom_bms.txt | 93
>+++++++++++++++++++
>> 1 file changed, 93 insertions(+)
>> create mode 100644
>Documentation/devicetree/bindings/power/supply/qcom_bms.txt
>>
>> diff --git
>a/Documentation/devicetree/bindings/power/supply/qcom_bms.txt
>b/Documentation/devicetree/bindings/power/supply/qcom_bms.txt
>> new file mode 100644
>> index 000000000000..6296399edc09
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/power/supply/qcom_bms.txt
>> @@ -0,0 +1,93 @@
>> +Qualcomm Battery Measurement System
>> +
>> +The Qualcomm Battery Measurement System is found inside of Qualcomm
>PM8941
>
>Is it Monitoring or Measurment?
>
>> +PMICs. It provides OCV and coulomb counter registers that allow the
>kernel
>> +to infer a capacity level.
>
>s/kernel/OS/
>
>OCV?
Open Circuit Voltage - should I expand this?
>
>> +
>> +Required properties:
>> +- compatible: Should contain "qcom,pm8941-bms".
>> +- reg: Specifies the SPMI address and length of
>the
>> + controller's registers.
>> +- interrupts: OCV threshold interrupt.
>> +- io-channels: Should contain IIO channel specifier for
>the
>> + ADC channel that reports battery temperature.
>> +- io-channel-names: Should contain "temp".
>> +- qcom,fcc-temp-legend: An array containing the temperature, in
>degC,
>> + for each column of the FCC lookup table.
>
>What's FCC?
Full charge capacity - Should i also expand this? or maybe explain in header paragraph?
>
>> +- qcom,fcc-lut: An array of FCC values in mah, one entry
>for each
>> + temperature defined in in qcom,fcc-temp-legend.
>> +- qcom,ocv-temp-legend: An array containing the temperature, in
>degC,
>> + for each column of the OCV lookup table.
>> +- qcom,ocv-capacity-legend: An array containing the capacity for
>each
>> + row of the OCV lookup table.
>> +- qcom,ocv-lut: An array of OCV values in mV, one entry
>for each
>> + capacity defined in qcom,ocv-capacity-legend.
>
>Need to specify the sizes of these if not 32-bit.
Right.
>
>All these seem to have units, so add unit suffixes as defined in
>property-units.txt.
Will do.
>
>> +
>> +Example:
>> +
>> + pm8941_vadc: vadc@3100 {
>
>adc@...
Okay.
>
>> + compatible = "qcom,spmi-vadc";
>> + reg = <0x3100>;
>> + interrupts = <0x0 0x31 0x0 IRQ_TYPE_EDGE_RISING>;
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + #io-channel-cells = <1>;
>> +
>> + bat_temp {
>> + reg = <VADC_LR_MUX1_BAT_THERM>;
>> + };
>> + };
>> +
>> + bms@4000 {
>> + compatible = "qcom,pm8941-bms";
>> + reg = <0x4000>;
>> + interrupts = <0x0 0x40 0x4 IRQ_TYPE_EDGE_RISING>;
>> + interrupt-names = "ocv_thr";
>> +
>> + io-channels = <&pm8941_vadc VADC_LR_MUX1_BAT_THERM>;
>> + io-channel-names = "temp";
>> +
>> + qcom,fcc-temp-legend = /bits/ 8 <(-10) 0 25 50 65>;
>> + qcom,fcc-lut = /bits/ 16 <6010 6070 6680 6780 6670>;
>> +
>> + qcom,ocv-capacity-legend = /bits/ 8 <100 95 90 85
>> + 80 75 70 65
>> + 60 55 50 45
>> + 40 35 30 25
>> + 20 15 10 9
>> + 8 7 6 5 4
>> + 3 2 1 0>;
>> +
>> + qcom,ocv-temp-legend = /bits/ 8 <(-10) 0 25 50 65>;
>> + qcom,ocv-lut = /bits/ 16 <4288 4288 4306 4315 4315
>> + 4261 4241 4259 4266 4246
>> + 4201 4181 4201 4207 4187
>> + 4153 4133 4150 4155 4135
>> + 4105 4085 4100 4104 4084
>> + 4058 4038 4052 4058 4038
>> + 4012 3992 4004 4014 3994
>> + 3970 3950 3959 3971 3951
>> + 3931 3911 3915 3927 3907
>> + 3899 3879 3880 3884 3864
>> + 3873 3853 3851 3853 3833
>> + 3848 3828 3827 3829 3809
>> + 3829 3809 3808 3809 3789
>> + 3815 3795 3791 3791 3771
>> + 3801 3781 3775 3772 3752
>> + 3785 3765 3751 3746 3726
>> + 3767 3747 3727 3719 3699
>> + 3750 3730 3702 3692 3672
>> + 3728 3708 3680 3672 3652
>> + 3720 3700 3676 3665 3645
>> + 3712 3692 3670 3660 3645
>> + 3695 3675 3658 3648 3633
>> + 3662 3647 3629 3620 3610
>> + 3620 3605 3589 3580 3570
>> + 3562 3552 3538 3529 3519
>> + 3490 3480 3474 3470 3465
>> + 3403 3398 3388 3380 3375
>> + 3320 3300 3255 3221 3206
>> + 3000 3000 3000 3000 3000>;
>> + };
>> + };
>> +};
>> --
>> 2.17.0
>>

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