408 lines
15 KiB
Plaintext
408 lines
15 KiB
Plaintext
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QPNP SMB Battery Charger
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QPNP SMB Charger is a single-cell switching mode battery charger. It can charge
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the battery and power the system via the USB and AC adapter input.
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The QPNP SMB Charger interfaces via the SPMI bus.
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There are six 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,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 watchdog timers
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and SYSOK pin control
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- qcom,chg-otg: OTG configuration control.
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Parent node required properties:
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- compatible: Must be "qcom,qpnp-smbcharger"
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- spmi-dev-container: Must be included in the parent node to set up the spmi
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sub node devices.
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- #address-cells: Must be <1>
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- #size-cells: Must be <1>
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- qcom,pmic-revid: Should specify the phandle of PMIC
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revid module. This is used to identify
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the PMIC subtype.
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Sub node required properties:
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- reg: The SPMI address 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,chgr:
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- chg-tcc-thr: Triggers on charge completion.
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- chg-taper-thr: Triggers on the taper charge
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transtion.
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- chg-inhibit: Notifies on battery voltage
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being too high to resume
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charging.
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- chg-p2f-thr: Triggers on transitioning from
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precharge to fastcharge.
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- chg-rechg-thr: Triggers on battery voltage
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falling below the resume
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threshold.
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qcom,bat-if:
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- batt-hot: Triggers on battery temperature
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hitting the hot threshold.
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Charging stops.
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- batt-warm: Triggers on battery temperature
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hitting the warm threshold.
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Charging current is reduced.
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- batt-cool: Triggers on battery temperature
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hitting the cool threshold.
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Charging current is reduced
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- batt-cold: Triggers on battery temperature
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hitting the cold threshold.
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Charging stops.
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- batt-missing: Battery missing status
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interrupt.
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- batt-low: Triggers on battery voltage
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falling across a low threshold.
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qcom,usb-chgpth:
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- usbin-uv: USB input voltage falls below a
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valid threshold.
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- usbin-src-det: USB automatic source detection
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finishes.
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qcom,dc-chgpth:
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- dcin-uv: DC input voltage falls below a
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valid threshold.
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qcom,chgr-misc:
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- wdog-timeout-mins: Charger watchdog timer
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interrupt.
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- temp-shutdown: Triggers when charger goes
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overtemp and causes a shutdown.
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- power-ok: Triggers when the charger
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switcher turns on or off.
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Regulator Subnodes:
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- qcom,smbcharger-boost-otg A subnode for a regulator device that turns on
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the charger boost for OTG operation.
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- qcom,smbcharger-external-otg A subnode for a regulator device that switches
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off charging and the USB input charge path
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in order to allow an external regulator to
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operate. This can be used in place of the
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qcom,smbcharger-boost-otg if an external boost
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is available.
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Regulator Sub node required properties:
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- regulator-name A name string for the regulator in question
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Optional Properties:
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- qcom,battery-psy-name The name of the main battery power supply that
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the charger will register. Failing to define
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this property will default the name to
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"battery".
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- qcom,bms-psy-name The psy name to use for reporting battery
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capacity. If left unspecified the capacity uses
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a preprogrammed default value of 50.
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- qcom,float-voltage-mv Float Voltage in mV - the maximum voltage up
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to which the battery is charged. Supported
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range 3600mV to 4500mV
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- qcom,float-voltage-comp Specifies the JEITA float voltage compensation.
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Value ranges from 0 to 63.
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- qcom,fastchg-current-ma Specifies the fast charge current in mA. Supported
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range is from 300mA to 3000mA.
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- qcom,fastchg-current-comp Specifies the fast charge current compensation in
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mA. Supported values are 250, 700, 900 and 1200mA.
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- qcom,charging-timeout-mins Maximum duration in minutes that a single
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charge cycle may last. Supported values are:
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0, 192, 384, 768, and 1536. A value of 0
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means that no charge cycle timeout is used and
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charging can continue indefinitely.
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- qcom,precharging-timeout-mins Maximum duration in minutes that a single
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precharge cycle may last. Supported values
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are: 0, 24, 48, 96, 192. A value of 0 means
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that no precharge cycle timeout is used and
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charging can continue indefinitely. Note that
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the qcom,charging-timeout-mins property must
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be specified in order for this to take effect.
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- qcom,dc-psy-type The type of charger connected to the DC path.
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Can be "Mains", "Wireless" or "Wipower"
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- qcom,dc-psy-ma The current in mA dc path can support. Must be
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specified if dc-psy-type is specified. Valid
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range 300mA to 2000mA.
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- qcom,dcin-vadc The phandle to pmi8994 voltage adc. The ADC is
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used to get notifications when the DCIN voltage
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crosses a programmed min/max threshold. This is
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used to make configurations for optimized power
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draw for Wipower.
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- qcom,wipower-div2-ilim-map
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- qcom,wipower-pt-ilim-map
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- qcom,wipower-default-ilim-map
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Array of 5 elements to indicate the voltage ranges and their corresponding
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current limits. The 5 elements with index [0..4] are:
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[0] => voltage_low in uV
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[1] => voltage_high in uV
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[2] => current limit for pass through in mA
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[3] => current limit for div2 mode dcin low voltage in mA
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[4] => current limit for div2 mode dcin high voltage in mA
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The div2 and pt tables indicate the current limits
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to use when Wipower is operating in divide_by_2 mode
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and pass through mode respectively.
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The default table is used when the voltage ranges
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are beyond the ones specified in the mapping table.
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Note that if dcin-vadc or any of these mapping
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tables are not specified, dynamic dcin input
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is disabled.
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- qcom,charging-disabled Set this if charging should be disabled in the
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build by default.
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- qcom,resume-delta-mv Specifies the minimum voltage drop in
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millivolts below the float voltage that is
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required in order to initiate a new charging
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cycle. Supported values are: 50, 100, 200 and
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300mV.
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- qcom,chg-inhibit-en Boolean that indicates whether the charge inhibit
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feature needs to be enabled. If this is not set,
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charge inhibit feature is disabled by default.
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- qcom,chg-inhibit-fg Indicates if the recharge threshold source has
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to be Fuel gauge ADC. If this is not set, it
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will be analog sensor by default.
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- qcom,bmd-algo-disabled Indicates if the battery missing detection
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algorithm is disabled. If this node is present
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SMB uses the THERM pin for battery missing
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detection.
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- qcom,charge-unknown-battery Boolean that indicates whether an unknown
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battery without a matching profile will be
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charged. If this is not set, if the fuel gauge
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does not recognize the battery based on its
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battery ID, the charger will not start
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charging.
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- qcom,bmd-pin-src A string that indicates the source pin for the
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battery missind detection. This can be either:
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- "bpd_none"
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battery is considered always present
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- "bpd_id"
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battery id pin is used
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- "bpd_thm"
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battery therm pin is used
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- "bpd_thm_id"
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both pins are used (battery is
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considered missing if either pin is
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floating).
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- qcom,iterm-ma Specifies the termination current to indicate
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end-of-charge. Possible values in mA:
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50, 100, 150, 200, 250, 300, 500, 600.
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- qcom,iterm-disabled Disables the termination current feature. This
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is a boolean property.
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- otg-parent-supply A phandle to an external boost regulator for
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OTG if it exists.
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- qcom,thermal-mitigation: Array of input current limit values for
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different system thermal mitigation levels.
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This should be a flat array that denotates the
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maximum charge current in mA for each thermal
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level.
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- qcom,rparasitics-uohm: The parasitic resistance of the board following
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the line from the battery connectors through
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vph_power. This is used to calculate maximum
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available current of the battery.
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- qcom,vled-max-uv: The maximum input voltage of the flash leds.
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This is used to calculate maximum available
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current of the battery.
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- qcom,autoadjust-vfloat A boolean property that when set, makes the
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driver automatically readjust vfloat using the
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fuel gauge ADC readings to make charging more
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accurate.
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- qcom,jeita-temp-hard-limit property when present will enable or disable
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the jeita temperature hard limit based on the
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value 1 or 0. Specify 0 if the jeita temp hard
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limit needs to be disabled. If it is not present,
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jeita temperature hard limit will be based on what
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the bootloader had set earlier.
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- qcom,low-volt-dcin: A boolean property which upon set will enable the
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AICL deglitch configuration dynamically. This needs
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to be set if the DCIN supply is going to be less
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than or equal to 5V.
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- qcom,force-aicl-rerun: A boolean property which upon set will enable the
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AICL rerun by default along with the deglitch time
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configured to long interval (20 ms). Also, specifying
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this property will not adjust the AICL deglitch time
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dynamically for handling the battery over-voltage
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oscillations when the charger is headroom limited.
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- qcom,aicl-rerun-period-s If force-aicl-rerun is on, this property dictates
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how often aicl is reran in seconds. Possible values
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are
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SCHG - 45, 90, 180, and 360.
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SCHG_LITE - 3 (2.8), 6 (5.6), 11 (11.3), 23 (22.5),
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45, 90, 180 and 360
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- qcom,ibat-ocp-threshold-ua Maximum current before the battery will trigger
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overcurrent protection. Use the recommended
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battery pack value minus some margin.
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- qcom,soft-vfloat-comp-disabled Set this property when the battery is
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powered via external source and could
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go above the float voltage.
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- qcom,parallel-usb-min-current-ma Minimum current drawn by the primary
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charger before enabling the parallel
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charger if one exists. Do not define
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this property if no parallel chargers
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exist.
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- qcom,parallel-usb-9v-min-current-ma Minimum current drawn by the primary
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charger before enabling the parallel
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charger if one exists. This property
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applies only for 9V chargers.
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- qcom,parallel-allowed-lowering-ma Acceptable current drop from the initial limit
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to keep parallel charger activated. If the
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charger current reduces beyond this threshold
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parallel charger is disabled. Must be specified
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if parallel charger is used.
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- qcom,parallel-main-chg-fcc-percent Percentage of the fast charge current allotted to the
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main charger when parallel charging is enabled and
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operational. If this property is not defined, the
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driver defaults to a 50%/50% split between the main
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and parallel charger.
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- qcom,parallel-main-chg-icl-percent Percentage of the input current allotted to the
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main charger when parallel charging is enabled and
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operational. If this property is not defined, the
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driver defaults to a 60%/40% split between the main
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and parallel charger.
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- qcom,battery-data Points to the phandle of node which
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contains the battery-profiles supported
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by the charger/FG.
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- qcom,chg-led-support A bool property to support the charger led feature.
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- qcom,chg-led-sw-controls A bool property to allow the software to control
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the charger led without a valid charger.
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- qcom,skip-usb-notification A boolean property to be used when usb gets present
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and type from other means. Especially true on
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liquid hardware, where usb presence is detected based on GPIO.
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- qcom,skip-usb-suspend-for-fake-battery A boolean property to skip
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suspending USB path for fake
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battery.
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- qcom,vchg_sns-vadc Phandle of the VADC node.
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- qcom,vchg-adc-channel-id The ADC channel to which the VCHG is routed.
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- qcom,external-typec A boolean property to be used when an external
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USB TypeC module is used with charger.
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- qcom,typec-psy-name The psy name to use for external typec. If
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'qcom,external-typec' is present then this is
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a required property.
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- qcom,otg-pinctrl: A boolean property to be used when OTG enable
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control is configured in pin control mode.
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Example:
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qcom,qpnp-smbcharger {
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spmi-dev-container;
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compatible = "qcom,qpnp-smbcharger";
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#address-cells = <1>;
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#size-cells = <1>;
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qcom,iterm-ma = <100>;
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qcom,float-voltage-mv = <4200>;
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qcom,resume-delta-mv = <100>;
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qcom,bmd-pin-src = "bpd_thm_id";
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qcom,dc-psy-type = "Mains";
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qcom,dc-psy-ma = <1500>;
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qcom,bms-psy-name = "bms";
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qcom,battery-psy-name = "battery";
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qcom,thermal-mitigation = <1500 700 600 325>;
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qcom,vchg_sns-vadc = <&pmi8950_vadc>;
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qcom,vchg-adc-channel-id = <3>;
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qcom,chgr@1000 {
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reg = <0x1000 0x100>;
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interrupts = <0x2 0x10 0x0>,
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<0x2 0x10 0x1>,
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<0x2 0x10 0x2>,
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<0x2 0x10 0x3>,
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<0x2 0x10 0x4>,
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<0x2 0x10 0x5>,
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<0x2 0x10 0x6>,
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<0x2 0x10 0x7>;
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interrupt-names = "chg-error",
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"chg-inhibit",
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"chg-prechg-sft",
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"chg-complete-chg-sft",
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"chg-p2f-thr",
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"chg-rechg-thr",
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"chg-taper-thr",
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"chg-tcc-thr";
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};
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|
qcom,otg@1100 {
|
||
|
|
reg = <0x1100 0x100>;
|
||
|
|
};
|
||
|
|
|
||
|
|
qcom,bat-if@1200 {
|
||
|
|
reg = <0x1200 0x100>;
|
||
|
|
interrupts = <0x2 0x12 0x0>,
|
||
|
|
<0x2 0x12 0x1>,
|
||
|
|
<0x2 0x12 0x2>,
|
||
|
|
<0x2 0x12 0x3>,
|
||
|
|
<0x2 0x12 0x4>,
|
||
|
|
<0x2 0x12 0x5>,
|
||
|
|
<0x2 0x12 0x6>,
|
||
|
|
<0x2 0x12 0x7>;
|
||
|
|
|
||
|
|
interrupt-names = "batt-hot",
|
||
|
|
"batt-warm",
|
||
|
|
"batt-cold",
|
||
|
|
"batt-cool",
|
||
|
|
"batt-ov",
|
||
|
|
"batt-low",
|
||
|
|
"batt-missing",
|
||
|
|
"batt-term-missing";
|
||
|
|
};
|
||
|
|
|
||
|
|
qcom,usb-chgpth@1300 {
|
||
|
|
reg = <0x1300 0x100>;
|
||
|
|
interrupts = <0x2 0x13 0x0>,
|
||
|
|
<0x2 0x13 0x1>,
|
||
|
|
<0x2 0x13 0x2>,
|
||
|
|
<0x2 0x13 0x3>,
|
||
|
|
<0x2 0x13 0x4>,
|
||
|
|
<0x2 0x13 0x5>,
|
||
|
|
<0x2 0x13 0x6>;
|
||
|
|
|
||
|
|
interrupt-names = "usbin-uv",
|
||
|
|
"usbin-ov",
|
||
|
|
"usbin-src-det",
|
||
|
|
"otg-fail",
|
||
|
|
"otg-oc",
|
||
|
|
"aicl-done",
|
||
|
|
"usbid-change";
|
||
|
|
};
|
||
|
|
|
||
|
|
qcom,dc-chgpth@1400 {
|
||
|
|
reg = <0x1400 0x100>;
|
||
|
|
interrupts = <0x2 0x14 0x0>,
|
||
|
|
<0x2 0x14 0x1>;
|
||
|
|
|
||
|
|
interrupt-names = "dcin-uv",
|
||
|
|
"dcin-ov";
|
||
|
|
};
|
||
|
|
|
||
|
|
qcom,chgr-misc@1600 {
|
||
|
|
reg = <0x1600 0x100>;
|
||
|
|
interrupts = <0x2 0x16 0x0>,
|
||
|
|
<0x2 0x16 0x1>,
|
||
|
|
<0x2 0x16 0x2>,
|
||
|
|
<0x2 0x16 0x3>,
|
||
|
|
<0x2 0x16 0x4>,
|
||
|
|
<0x2 0x16 0x5>;
|
||
|
|
|
||
|
|
interrupt-names = "power-ok",
|
||
|
|
"temp-shutdown",
|
||
|
|
"wdog-timeout",
|
||
|
|
"flash-fail",
|
||
|
|
"otst2",
|
||
|
|
"otst3";
|
||
|
|
};
|
||
|
|
};
|