286 lines
8.5 KiB
Plaintext
286 lines
8.5 KiB
Plaintext
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Qualcomm QPNP Charger
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The charger supports the switch mode battery charger and boost (SMBB)
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peripherals on Qualcomm PMIC chips.
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There are seven different peripherals adding the following functionality.
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Each of these peripherals are implemented as subnodes in the example at the
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end of this file.
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- qcom,chgr: Supports charging control and status
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reporting.
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- qcom,bat-if: Battery status reporting such as presence,
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temperature reporting and voltage collapse
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protection.
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- qcom,buck: Charger buck configuration and status
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reporting with regards to several regulation
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loops such as vdd, ibat etc.
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- qcom,usb-chgpth: USB charge path detection and input current
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limiting configuration.
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- qcom,dc-chgpth: DC charge path detection and input current
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limiting configuration.
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- qcom,chg-misc: Miscellaneous features such as buck frequency
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settings, comparator override features etc.
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Parent node required properties:
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- qcom,vddmax-mv: Target voltage of battery in mV.
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- qcom,vddsafe-mv: Maximum Vdd voltage in mV.
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- qcom,vinmin-mv: Minimum input voltage in mV.
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- qcom,ibatmax-ma: Maximum battery charge current in mA
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- qcom,ibatsafe-ma: Safety battery current setting
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- qcom,thermal-mitigation: Array of ibatmax values for different
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system thermal mitigation level.
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Parent node optional properties:
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- qcom,ibatterm-ma: Current at which charging is terminated when
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the analog end of charge option is selected.
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- qcom,maxinput-usb-ma: Maximum input current USB.
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- qcom,maxinput-dc-ma: Maximum input current DC.
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- qcom,vbatdet-delta-mv: Battery charging resume delta.
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- qcom,charging-disabled: Set this property to disable charging
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by default. This can then be overriden
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writing the the module parameter
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"charging_disabled".
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- qcom,duty-cycle-100p: Set this property to enable the 100% duty
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cycle feature.
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- qcom,use-default-batt-values: Set this flag to force reporting of
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battery temperature of 250 decidegree
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Celsius, state of charge to be 50%
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and disable charging.
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- qcom,warm-bat-decidegc: Warm battery temperature in decidegC.
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- qcom,cool-bat-decidegc: Cool battery temperature in decidegC.
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Note that if both warm and cool battery
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temperatures are set, the corresponding
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ibatmax and bat-mv properties are
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required to be set.
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- qcom,ibatmax-cool-ma: Maximum cool battery charge current.
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- qcom,ibatmax-warm-ma: Maximum warm battery charge current.
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- qcom,warm-bat-mv: Warm temperature battery target voltage.
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- qcom,cool-bat-mv: Cool temperature battery target voltage.
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- qcom,tchg-mins: Maximum total software initialized charge time.
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- qcom,bpd-detection: Select a battery presence detection scheme by
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specifying either "bpd_thm", "bpd_id" or
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"bpd_thm_id". "bpd_thm" selects the temperature
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pin, "bpd_id" uses the id pin for battery presence
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detection, "bpd_thm_id" selects both.
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If the property is not set, the temperatue pin will
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be used.
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- otg-parent-supply Specify a phandle to a parent supply regulator
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for the OTG regulator.
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- boost-parent-supply Specify a phandle to a parent supply regulator
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for the boost regulator.
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Sub node required structure:
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- A qcom,chg node must be a child of an SPMI node that has specified
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the spmi-dev-container property. Each subnode reflects
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a hardware peripheral which adds a unique set of features
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to the collective charging device. For example USB detection
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and the battery interface are each seperate peripherals and
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each should be their own subnode.
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Sub node required properties:
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- compatible: Must be "qcom,qpnp-charger".
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- reg: Specifies the SPMI address and size for this peripheral.
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- interrupts: Specifies the interrupt associated with the peripheral.
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- interrupt-names: Specifies the interrupt names for the peripheral. Every
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available interrupt needs to have an associated name
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with it to indentify its purpose.
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The following lists each subnode and their corresponding
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required interrupt names:
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qcom,usb-chgpth:
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- usbin-valid
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qcom,chgr:
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- chg-done
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- chg-failed
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The following interrupts are available:
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qcom,chgr:
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- chg-done: Triggers on charge completion.
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- chg-failed: Notifies of charge failures.
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- fast-chg-on: Notifies of fast charging state.
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- trkl-chg-on: Indicates trickle charging.
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- state-change: Notifies of a state change in
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the charger state machine.
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- chgwdog: Charger watchdog interrupt.
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- vbat-det-hi: Triggers on vbat-det-hi voltage
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setting,can be used as
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battery alarm.
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- vbat-det-hi: Triggers on vbat-det-low voltage
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setting, can be used as
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battery alarm.
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qcom,buck:
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- vdd-loop: VDD loop change interrupt.
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- ibat-loop: Ibat loop change interrupt.
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- ichg-loop: Charge current loop change.
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- vchg-loop: Charge voltage loop change.
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- overtemp: Overtemperature interrupt.
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- vref-ov: Reference overvoltage interrupt.
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- vbat-ov: Battery overvoltage interrupt.
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qcom,bat-if:
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- psi: PMIC serial interface interrupt.
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- vcp-on: Voltage collapse protection
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status interrupt.
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- bat-fet-on: BATFET status interrupt.
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- bat-temp-ok: Battery temperature status
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interrupt.
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- batt-pres: Battery presence status
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interrupt.
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qcom,usb-chgpth:
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- usbin-valid: Indicates valid USB connection.
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- coarse-det-usb: Coarse detect interrupt triggers
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at low voltage on USB_IN.
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- chg-gone: Triggers on VCHG line.
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qcom,dc-chgpth:
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- dcin-valid: Indicates a valid DC charger
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connection.
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- coarse-det-dc: Coarse detect interrupt triggers
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at low voltage on DC_IN.
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qcom,boost:
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- limit-error: Limiting error on SMBB boost.
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- boost-pwr-ok: Status of boost power.
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Sub node optional properties:
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qcom,usb-chgpth:
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- regulator-name: A string used as a descriptive name
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for the OTG regulator.
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qcom,boost:
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- regulator-min-microvolt: Minimum boost voltage setting.
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- regulator-max-microvolt: Maximum boost voltage setting.
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- regulator-name: A string used as a descriptive name
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for the boost regulator.
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Example:
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pm8941-chg {
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spmi-dev-container;
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compatible = "qcom,qpnp-charger";
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#address-cells = <1>;
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#size-cells = <1>;
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otg-parent-supply = <&pm8941_boost>;
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boost-parent-supply = <&foo_parent_reg>;
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qcom,vddmax-mv = <4200>;
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qcom,vddsafe-mv = <4200>;
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qcom,vinmin-mv = <4200>;
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qcom,ibatmax-ma = <1500>;
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qcom,ibatterm-ma = <200>;
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qcom,ibatsafe-ma = <1500>;
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qcom,thermal-mitigation = <1500 700 600 325>;
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qcom,cool-bat-degc = <10>;
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qcom,cool-bat-mv = <4100>;
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qcom,ibatmax-warm-ma = <350>;
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qcom,warm-bat-degc = <45>;
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qcom,warm-bat-mv = <4100>;
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qcom,ibatmax-cool-ma = <350>;
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qcom,vbatdet-delta-mv = <60>;
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qcom,chgr@1000 {
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reg = <0x1000 0x100>;
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interrupts = <0x0 0x10 0x0>,
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<0x0 0x10 0x1>,
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<0x0 0x10 0x2>,
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<0x0 0x10 0x3>,
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<0x0 0x10 0x4>,
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<0x0 0x10 0x5>,
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<0x0 0x10 0x6>,
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<0x0 0x10 0x7>;
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interrupt-names = "chg-done",
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"chg-failed",
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"fast-chg-on",
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"trkl-chg-on",
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"state-change",
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"chgwdog",
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"vbat-det-hi",
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"vbat-det-lo";
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};
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qcom,buck@1100 {
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reg = <0x1100 0x100>;
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interrupts = <0x0 0x11 0x0>,
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<0x0 0x11 0x1>,
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<0x0 0x11 0x2>,
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<0x0 0x11 0x3>,
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<0x0 0x11 0x4>,
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<0x0 0x11 0x5>,
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<0x0 0x11 0x6>;
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interrupt-names = "vdd-loop",
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"ibat-loop",
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"ichg-loop",
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"vchg-loop",
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"overtemp",
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"vref-ov",
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"vbat-ov";
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};
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qcom,bat-if@1200 {
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reg = <0x1200 0x100>;
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interrupts = <0x0 0x12 0x0>,
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<0x0 0x12 0x1>,
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<0x0 0x12 0x2>,
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<0x0 0x12 0x3>,
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<0x0 0x12 0x4>;
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interrupt-names = "psi",
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"vcp-on",
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"bat-fet-on",
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"bat-temp-ok",
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"batt-pres";
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};
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pm8941_chg_otg: qcom,usb-chgpth@1300 {
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reg = <0x1300 0x100>;
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interrupts = <0 0x13 0x0>,
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<0 0x13 0x1>,
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<0x0 0x13 0x2>;
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interrupt-names = "usbin-valid",
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"coarse-det-usb",
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"chg-gone";
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};
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qcom,dc-chgpth@1400 {
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reg = <0x1400 0x100>;
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interrupts = <0x0 0x14 0x0>,
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<0x0 0x14 0x1>;
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interrupt-names = "dcin-valid",
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"coarse-det-dc";
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};
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pm8941_chg_boost: qcom,boost@1500 {
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reg = <0x1500 0x100>;
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interrupts = <0x0 0x15 0x0>,
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<0x0 0x15 0x1>;
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interrupt-names = "limit-error",
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"boost-pwr-ok";
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};
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qcom,misc@1600 {
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reg = <0x1600 0x100>;
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};
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};
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In regulator specific device tree file:
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&pm8941_chg_boost {
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regulator-min-microvolt = <5000000>;
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regulator-max-microvolt = <5000000>;
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regulator-name = "8941_smbb_boost";
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};
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&pm8941_chg_otg {
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regulator-name = "8941_smbb_otg";
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};
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