| Qualcomm QPNP Linear Charger |
| |
| The charger module supports the linear battery charger peripherals on |
| Qualcomm PMIC chips. |
| |
| There are four different peripherals in the charger module. |
| Each of these peripherals are implemented as subnodes. |
| |
| - qcom,chgr: Supports charging control and status reporting |
| - qcom,bat-if: Battery status reporting such as presence and |
| temperature reporting. |
| - qcom,usb-chgpth: USB charge path detection and input current |
| limiting configuration. |
| - qcom,chg-misc: Miscellaneous features such as comparator override |
| features etc. |
| |
| Parent node required properties: |
| - qcom,vddmax-mv: Target voltage of battery in mV. |
| - qcom,vddsafe-mv: Maximum Vdd voltage in mV. |
| - qcom,vinmin-mv: Minimum input voltage in mV. |
| - qcom,ibatsafe-ma: Safety battery current setting |
| |
| Parent node optional properties: |
| - qcom,vbatweak-uv: Weak battery voltage threshold in uV, |
| above which fast charging can start. |
| The supported voltage range is from |
| 3000000uV to 3581250uV with a step |
| size of 18750000 uV. |
| - qcom,charging-disabled: Set this property to disable charging |
| by default. |
| - qcom,use-default-batt-values: Set this flag to force reporting of |
| fake battery. |
| - qcom,warm-bat-decidegc: Warm battery temperature in decidegC. |
| - qcom,cool-bat-decidegc: Cool battery temperature in decidegC. |
| Note that if both warm and cool |
| battery temperatures are set, the |
| corresponding ibatmax and bat-mv |
| properties are required to be set. |
| - qcom,ibatmax-cool-ma: Maximum cool battery charge current. |
| - qcom,ibatmax-warm-ma: Maximum warm battery charge current. |
| - qcom,warm-bat-mv: Warm temperature battery target |
| voltage. |
| - qcom,cool-bat-mv: Cool temperature battery target |
| voltage. |
| - qcom,thermal-mitigation: Array of ibatmax values for different |
| system thermal mitigation level. |
| - qcom,tchg-mins: Maximum total software initialized |
| charge time. |
| - qcom,bpd-detection: Select a battery presence detection |
| scheme by specifying either "bpd_thm" |
| "bpd_id" or "bpd_thm_id". "bpd_thm" |
| selects the temperature pin, "bpd_id" |
| uses the id pin for battery presence |
| detection, "bpd_thm_id" selects both. |
| If the property is not set, the |
| temperatue pin will be used. |
| - qcom,btc-disabled: If flag is set battery hot and cold |
| monitoring is disabled in hardware. |
| This monitoring is turned on by |
| default. |
| - qcom,batt-hot-percentage: Specify a supported hot threshold |
| percentage. |
| Supported thresholds: 25% and 35%. If |
| none is specified hardware defaults |
| will be used. |
| - qcom,batt-cold-percentage: Specify a supported cold threshold |
| percentage. Supported thresholds: 70% |
| and 80%. If none is specified |
| hardwaredefaults will be used. |
| - qcom,chg-adc_tm Corresponding ADC TM device's phandle |
| to set recurring measurements and |
| receive notification for batt_therm. |
| -qcom,float-charge If specified enable float charging. |
| - qcom,resume-soc Capacity in percent at which charging |
| should resume when a fully charged |
| battery drops below this level. |
| - qcom,chg-vadc Corresponding VADC device's phandle. |
| - qcom,charger-detect-eoc If specified charger hardware will |
| detect end-of-charge. |
| If not specified charger driver |
| depends on BMSfor end-of-charge |
| detection. |
| - qcom,disable-vbatdet-based-recharge If specified disable VBATDET irq |
| and charging can only be resumed |
| if charger is re-inserted or SOC |
| falls below resume SOC. |
| This property should always be used |
| along with the BMS property: |
| "qcom,disable-suspend-on-usb". |
| - qcom,use-external-charger If specifed the LBC module will |
| be disabled and the driver will not |
| register. It also enables BID for |
| BPD and disables BTC. Declare this node |
| only if you are using an external charger |
| and not the PMIC internal LBC. |
| - qcom,chgr-led-support There is a current sink device in linear |
| charger module, it is used to control a |
| led which can act as a charger led as well |
| as a general notification led. |
| - qcom,bms-controlled-charging This property enables BMS to control |
| charging. BMS and charger communicates |
| with each other via power_supply |
| framework. |
| - qcom,parallel-charger This is a bool property to indicate the |
| LBC will operate as a secondary charger |
| in the parallel mode. If this is enabled |
| the charging operations will be controlled by |
| the primary-charger. |
| |
| |
| Sub node required structure: |
| - A qcom,charger node must be a child of an SPMI node that has specified |
| the spmi-dev-container property. Each subnode reflects |
| a hardware peripheral which adds a unique set of features |
| to the collective charging device. For example USB detection |
| and the battery interface are each seperate peripherals and |
| each should be their own subnode. |
| |
| Sub node required properties: |
| - compatible: Must be "qcom,qpnp-linear-charger". |
| - reg: Specifies the SPMI address and size for this |
| peripheral. |
| - interrupts: Specifies the interrupt associated with the |
| peripheral. |
| - interrupt-names: Specifies the interrupt names for the peripheral. |
| Every available interrupt needs to have an associated |
| name with it to indentify its purpose. |
| |
| The following lists each subnode and their |
| corresponding required interrupt names: |
| |
| qcom,usb-chgpth: |
| - usbin-valid |
| |
| The following interrupts are available: |
| |
| qcom,usb-chgpth: |
| - usbin-valid: Indicates valid USB |
| connection. |
| - coarse-det-usb: Coarse detect interrupt |
| triggers at low voltage on |
| USB_IN. |
| - chg-gone: Triggers on VCHG line. |
| - overtemp: Triggers on over temperature |
| condition |
| |
| qcom,chgr: |
| - chg-done: Triggers on charge completion. |
| - chg-failed: Notifies of charge failures. |
| - fast-chg-on: Notifies of fast charging. |
| - vbat-det-lo: Triggers on vbat-det-lo |
| voltage. |
| |
| Example: |
| pm8916-chg: qcom,charger { |
| spmi-dev-container; |
| compatible = "qcom,qpnp-linear-charger"; |
| #address-cells = <1>; |
| #size-cells = <1>; |
| |
| qcom,vddmax-mv = <4200>; |
| qcom,vddsafe-mv = <4200>; |
| qcom,vinmin-mv = <4200>; |
| qcom,ibatsafe-ma = <1440>; |
| qcom,vbatweak-uv = <3200>; |
| qcom,thermal-mitigation = <1500 700 600 325>; |
| qcom,cool-bat-decidegc = <100>; |
| qcom,warm-bat-decidegc = <450>; |
| qcom,cool-bat-mv = <4100>; |
| qcom,ibatmax-warm-ma = <360>; |
| qcom,ibatmax-cool-ma = <360>; |
| qcom,warm-bat-mv = <4100>; |
| qcom,batt-hot-percentage = <25>; |
| qcom,batt-cold-percentage = <85>; |
| qcom,tchg-mins = <152>; |
| qcom,resume-soc = <99>; |
| qcom,btc-disabled = <0>; |
| qcom,chg-vadc = <&pm8916_vadc>; |
| |
| qcom,chgr@1000 { |
| reg = <0x1000 0x100>; |
| interrupts = <0x0 0x10 0x7>, |
| <0x0 0x10 0x6>, |
| <0x0 0x10 0x5>, |
| <0x0 0x10 0x0>; |
| |
| interrupt-names = "chg-done", |
| "chg-failed", |
| "fast-chg-on", |
| "vbat-det-lo"; |
| }; |
| |
| qcom,bat-if@1200 { |
| reg = <0x1200 0x100>; |
| interrupts = <0x0 0x12 0x1>, |
| <0x0 0x12 0x0>; |
| |
| interrupt-names = "bat-temp-ok", |
| "batt-pres"; |
| }; |
| |
| qcom,usb-chgpth@1300 { |
| reg = <0x1300 0x100>; |
| interrupts = <0 0x13 0x2>, |
| <0 0x13 0x1>; |
| |
| interrupt-names = "chg-gone", |
| "usbin-valid"; |
| }; |
| |
| qcom,chg-misc@1600 { |
| reg = <0x1600 0x100>; |
| }; |
| }; |
