Add bindings for the Qualcomm battery measurement system.
Signed-off-by: Craig Tatlor <ctatlo...@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
+PMICs. It provides OCV and coulomb counter registers that allow the kernel
+to infer a capacity level.
+
+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.
+- 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.
+
+Example:
+
+ pm8941_vadc: vadc@3100 {
+ 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
