Qualcomm QPNP Charger The charger supports the switch mode battery charger and boost (SMBB) peripherals on Qualcomm PMIC chips. There are seven different peripherals adding the following functionality. Each of these peripherals are implemented as subnodes in the example at the end of this file. - qcom,chgr: Supports charging control and status reporting. - qcom,bat-if: Battery status reporting such as presence, temperature reporting and voltage collapse protection. - qcom,buck: Charger buck configuration and status reporting with regards to several regulation loops such as vdd, ibat etc. - qcom,usb-chgpth: USB charge path detection and input current limiting configuration. - qcom,dc-chgpth: DC charge path detection and input current limiting configuration. - qcom,chg-misc: Miscellaneous features such as buck frequency settings, 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,ibatmax-ma: Maximum battery charge current in mA - qcom,ibatsafe-ma: Safety battery current setting - qcom,thermal-mitigation: Array of ibatmax values for different system thermal mitigation level. Parent node optional properties: - qcom,ibatterm-ma: Current at which charging is terminated when the analog end of charge option is selected. - qcom,maxinput-usb-ma: Maximum input current USB. - qcom,maxinput-dc-ma: Maximum input current DC. - qcom,vbatdet-delta-mv: Battery charging resume delta. - qcom,vbatweak-mv: Weak battery voltage threshold in mV, above which fast charging can start. The supported voltage range is from 2100mV to 3600mV with a step size of 100mV. - qcom,charging-disabled: Set this property to disable charging by default. This can then be overriden writing the the module parameter "charging_disabled". - qcom,duty-cycle-100p: Set this property to enable the 100% duty cycle feature. - qcom,use-default-batt-values: Set this flag to force reporting of battery temperature of 250 decidegree Celsius, state of charge to be 50% and disable charging. - 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,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-percent: Specify a supported hot threshold percentage. Supported thresholds: 25% and 35%. If none is specified hardware defaults will be used. - qcom,batt-cold-percent: Specify a supported cold threshold percentage. Supported thresholds: 70% and 80%. If none is specified hardware defaults will be used. - otg-parent-supply Specify a phandle to a parent supply regulator for the OTG regulator. - boost-parent-supply Specify a phandle to a parent supply regulator for the boost regulator. - 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,pmic-revid The phandle to the revid node of the pmic on which charger peripheral is present. This property is a must on PMIC chips that exhibit inaccuracies in battery current readings. This phandle is used to check the version of the PMIC and apply necessary software workarounds. - qcom,ext-ovp-present Indicates if an external OVP exists which reduces the overall input resistance of the charge path. - qcom,ovp-monitor-en The ovp is enabled on hw by default. If this flag is set, the charger ovp status is monitored in software. - qcom,ibat-calibration-enabled Indicates if ibat calibration is enabled. This is required for devices which have a ibat trim error causing ibatmax to go out of spec. - qcom,power-stage-reduced Indicates if power stage workaround is enabled. This work around reduces the power stage segments while charging under high load during low battery voltages. It's for improving IADC accuracy while board has a bad layout. - qcom,use-external-rsense A boolean that controls whether BMS will use an external sensor resistor instead of the default RDS of the batfet. - qcom,vbatdet-maxerr-mv This property in mV is a hystersis value for the charge resume voltage property qcom,vbatdet-delta-mv. If this property is not defined it defaults to 50 mV. - qcom,parallel-ovp-mode When this option is enabled, it allows charging through both DC and USB OVP FETs. Please note that this should only be enabled in board designs with PM8941 which have DC_IN and USB_IN connected via a short. - qcom,ext-ovp-isns-enable-gpio External OVP enable GPIO. - qcom,ext-ovp-isns-r-ohm External ISNS OVP resistance in ohm. Sub node required structure: - A qcom,chg 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. - qcom,chg-adc_tm Corresponding ADC TM device's phandle to set recurring measurements and receive notification for batt_therm. Sub node required properties: - compatible: Must be "qcom,qpnp-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 - usb-ocp (only for SMBBP and SMBCL) qcom,chgr: - chg-done - chg-failed The following interrupts are available: qcom,chgr: - chg-done: Triggers on charge completion. - chg-failed: Notifies of charge failures. - fast-chg-on: Notifies of fast charging state. - trkl-chg-on: Indicates trickle charging. - state-change: Notifies of a state change in the charger state machine. - chgwdog: Charger watchdog interrupt. - vbat-det-hi: Triggers on vbat-det-hi voltage setting,can be used as battery alarm. - vbat-det-hi: Triggers on vbat-det-low voltage setting, can be used as battery alarm. qcom,buck: - vdd-loop: VDD loop change interrupt. - ibat-loop: Ibat loop change interrupt. - ichg-loop: Charge current loop change. - vchg-loop: Charge voltage loop change. - overtemp: Overtemperature interrupt. - vref-ov: Reference overvoltage interrupt. - vbat-ov: Battery overvoltage interrupt. qcom,bat-if: - psi: PMIC serial interface interrupt. - vcp-on: Voltage collapse protection status interrupt. - bat-fet-on: BATFET status interrupt. - bat-temp-ok: Battery temperature status interrupt. - batt-pres: Battery presence status interrupt. 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. - usb-ocp Triggers on over current conditions when reverse boosting. (Only available on SMBCL and SMBBP devices). qcom,dc-chgpth: - dcin-valid: Indicates a valid DC charger connection. - coarse-det-dc: Coarse detect interrupt triggers at low voltage on DC_IN. qcom,boost: - limit-error: Limiting error on SMBB boost. - boost-pwr-ok: Status of boost power. Sub node optional properties: qcom,usb-chgpth: - regulator-name: A string used as a descriptive name for the OTG regulator. qcom,boost: - regulator-min-microvolt: Minimum boost voltage setting. - regulator-max-microvolt: Maximum boost voltage setting. - regulator-name: A string used as a descriptive name for the boost regulator. qcom,batfet: - regulator-name: A string used as a descriptive name for the batfet regulator. qcom,chgr: - regulator-name: A string used as a descriptive name for the flash workarounds regulator. Example: pm8941-chg { spmi-dev-container; compatible = "qcom,qpnp-charger"; #address-cells = <1>; #size-cells = <1>; otg-parent-supply = <&pm8941_boost>; boost-parent-supply = <&foo_parent_reg>; qcom,vddmax-mv = <4200>; qcom,vddsafe-mv = <4200>; qcom,vinmin-mv = <4200>; qcom,ibatmax-ma = <1500>; qcom,ibatterm-ma = <200>; qcom,ibatsafe-ma = <1500>; qcom,vbatweak-mv = <3200>; qcom,thermal-mitigation = <1500 700 600 325>; qcom,cool-bat-degc = <10>; qcom,cool-bat-mv = <4100>; qcom,ibatmax-warm-ma = <350>; qcom,warm-bat-degc = <45>; qcom,warm-bat-mv = <4100>; qcom,ibatmax-cool-ma = <350>; qcom,vbatdet-delta-mv = <60>; qcom,batt-hot-percent = <25>; qcom,batt-cold-percent = <85>; qcom,btc-disabled = <0>; qcom,chg-vadc = <&pm8941_vadc>; qcom,chg-adc_tm = <&pm8941_adc_tm>; qcom,pmic-revid = <&pm8941_revid>; qcom,chgr@1000 { reg = <0x1000 0x100>; interrupts = <0x0 0x10 0x0>, <0x0 0x10 0x1>, <0x0 0x10 0x2>, <0x0 0x10 0x3>, <0x0 0x10 0x4>, <0x0 0x10 0x5>, <0x0 0x10 0x6>, <0x0 0x10 0x7>; interrupt-names = "chg-done", "chg-failed", "fast-chg-on", "trkl-chg-on", "state-change", "chgwdog", "vbat-det-hi", "vbat-det-lo"; }; qcom,buck@1100 { reg = <0x1100 0x100>; interrupts = <0x0 0x11 0x0>, <0x0 0x11 0x1>, <0x0 0x11 0x2>, <0x0 0x11 0x3>, <0x0 0x11 0x4>, <0x0 0x11 0x5>, <0x0 0x11 0x6>; interrupt-names = "vdd-loop", "ibat-loop", "ichg-loop", "vchg-loop", "overtemp", "vref-ov", "vbat-ov"; }; qcom,bat-if@1200 { reg = <0x1200 0x100>; interrupts = <0x0 0x12 0x0>, <0x0 0x12 0x1>, <0x0 0x12 0x2>, <0x0 0x12 0x3>, <0x0 0x12 0x4>; interrupt-names = "psi", "vcp-on", "bat-fet-on", "bat-temp-ok", "batt-pres"; }; pm8941_chg_otg: qcom,usb-chgpth@1300 { reg = <0x1300 0x100>; interrupts = <0 0x13 0x0>, <0 0x13 0x1>, <0x0 0x13 0x2>; interrupt-names = "usbin-valid", "coarse-det-usb", "chg-gone"; }; qcom,dc-chgpth@1400 { reg = <0x1400 0x100>; interrupts = <0x0 0x14 0x0>, <0x0 0x14 0x1>; interrupt-names = "dcin-valid", "coarse-det-dc"; }; pm8941_chg_boost: qcom,boost@1500 { reg = <0x1500 0x100>; interrupts = <0x0 0x15 0x0>, <0x0 0x15 0x1>; interrupt-names = "limit-error", "boost-pwr-ok"; }; qcom,misc@1600 { reg = <0x1600 0x100>; }; }; In regulator specific device tree file: &pm8941_chg_boost { regulator-min-microvolt = <5000000>; regulator-max-microvolt = <5000000>; regulator-name = "8941_smbb_boost"; }; &pm8941_chg_batif { regulator-name = "batfet"; }; &pm8941_chg_otg { regulator-name = "8941_smbb_otg"; };