power: qcom: Add snapshot of charger and fuel gauge drivers

Qualcomm Technologies, Inc. QPNP PMIC Fuel Gauge Gen3 Device

QPNP PMIC FG Gen3 device provides interface to the clients to read properties

related to the battery. Its main function is to retrieve the State of Charge

(SOC), in percentage scale representing the amount of charge left in the

battery.

=======================

Required Node Structure

=======================

FG Gen3 device must be described in two levels of device nodes.  The first

level describes the FG Gen3 device.  The second level describes one or more

peripherals managed by FG Gen3 driver. All the peripheral specific parameters

such as base address, interrupts etc., should be under second level node.

====================================

First Level Node - FG Gen3 device

====================================

- compatible

	Usage:      required

	Value type: <string>

	Definition: Should be "qcom,fg-gen3".

- qcom,pmic-revid

	Usage:      required

	Value type: <phandle>

	Definition: Should specify the phandle of PMIC revid module. This is

		    used to identify the PMIC subtype.

- io-channels

- io-channel-names

	Usage:      required

	Value type: <phandle>

	Definition: For details about IIO bindings see:

		    Documentation/devicetree/bindings/iio/iio-bindings.txt

- qcom,rradc-base

	Usage:      required

	Value type: <u32>

	Definition: Should specify the base address of RR_ADC peripheral. This

		    is used for reading certain peripheral registers under it.

- qcom,fg-cutoff-voltage

	Usage:      optional

	Value type: <u32>

	Definition: The voltage (in mV) where the fuel gauge will steer the SOC

		    to be zero. For example, if the cutoff voltage is set to

		    3400mv, the fuel gauge will try to count SoC so that the

		    battery SOC will be 0 when it is 3400mV. If this property

		    is not specified, then the default value used will be

		    3200mV.

- qcom,fg-empty-voltage

	Usage:      optional

	Value type: <u32>

	Definition: The voltage threshold (in mV) based on which the empty soc

		    interrupt will be triggered. When the empty soc interrupt

		    fires, battery soc will be set to 0 and the userspace will

		    be notified via the power supply framework. The userspace

		    will read 0% soc and immediately shutdown. If this property

		    is not specified, then the default value used will be

		    2800mV.

- qcom,fg-vbatt-low-thr

	Usage:      optional

	Value type: <u32>

	Definition: The voltage threshold (in mV) which upon set will be used

		    for configuring the low battery voltage threshold.

- qcom,fg-recharge-voltage

	Usage:      optional

	Value type: <u32>

	Definition: The voltage threshold (in mV) based on which the charging

		    will be resumed once the charging is complete. If this

		    property is not specified, then the default value will be

		    4250mV.

- qcom,fg-chg-term-current

	Usage:      optional

	Value type: <u32>

	Definition: Battery current (in mA) at which the fuel gauge will issue

		    an end of charge if the charger is configured to use the

		    fuel gauge ADC for end of charge detection. If this

		    property is not specified, then the default value used

		    will be 100mA.

- qcom,fg-sys-term-current

	Usage:      optional

	Value type: <u32>

	Definition: Battery current (in mA) at which the fuel gauge will try to

		    scale towards 100%. When the charge current goes above this

		    the SOC should be at 100%. If this property is not

		    specified, then the default value used will be -125mA.

		    This value has to be specified in negative values for

		    the charging current.

- qcom,fg-chg-term-base-current

	Usage:      optional

	Value type: <u32>

	Definition: Battery current (in mA) upper boundary at which the fuel

		    gauge will issue an end of charge during discharging. If

		    this property is not specified, then the default value used

		    will be 75mA.

- qcom,fg-delta-soc-thr

	Usage:      optional

	Value type: <u32>

	Definition: Percentage of SOC increase upon which the delta monotonic &

		    battery SOC interrupts will be triggered. If this property

		    is not specified, then the default value will be 1.

		    Possible values are in the range of 0 to 12.

- qcom,fg-recharge-soc-thr

	Usage:      optional

	Value type: <u32>

	Definition: Percentage of monotonic SOC upon which the charging will

		    will be resumed once the charging is complete. If this

		    property is not specified, then the default value will be

		    95.

- qcom,fg-rsense-sel

	Usage:      optional

	Value type: <u32>

	Definition: Specifies the source of sense resistor.

		    Allowed values are:

		    0 - Rsense is from Battery FET

		    2 - Rsense is Battery FET and SMB

		    Option 2 can be used only when a parallel charger is

		    present. If this property is not specified, then the

		    default value will be 2.

- qcom,fg-jeita-thresholds

	Usage:      optional

	Value type: <prop-encoded-array>

	Definition: A list of integers which holds the jeita thresholds (degC)

		    in the following order. Allowed size is 4.

		    Element 0 - JEITA cold threshold

		    Element 1 - JEITA cool threshold

		    Element 2 - JEITA warm threshold

		    Element 3 - JEITA hot threshold

		    If these parameters are not specified, then the default

		    values used will be 0, 5, 45, 50.

- qcom,fg-esr-timer-charging

	Usage:      optional

	Value type: <prop-encoded-array>

	Definition: Number of cycles between ESR pulses while the battery is

		    charging. Array of 2 elements if specified.

		    Element 0 - Retry value for timer

		    Element 1 - Maximum value for timer

- qcom,fg-esr-timer-awake

	Usage:      optional

	Value type: <prop-encoded-array>

	Definition: Number of cycles between ESR pulses while the system is

		    awake and the battery is discharging. Array of 2 elements

		    if specified.

		    Element 0 - Retry value for timer

		    Element 1 - Maximum value for timer

- qcom,fg-esr-timer-asleep

	Usage:      optional

	Value type: <prop-encoded-array>

	Definition: Number of cycles between ESR pulses while the system is

		    asleep and the battery is discharging. This option requires

		    qcom,fg-esr-timer-awake to be defined. Array of 2 elements

		    if specified.

		    Element 0 - Retry value for timer

		    Element 1 - Maximum value for timer

- qcom,fg-esr-pulse-thresh-ma

	Usage:      optional

	Value type: <u32>

	Definition: ESR pulse qualification threshold in mA. If this is not

		    specified, a default value of 110 mA will be configured.

		    Allowed values are from 1 to 997.

- qcom,fg-esr-meas-curr-ma

	Usage:      optional

	Value type: <u32>

	Definition: ESR measurement current in mA. If this is not specified,

		    a default value of 120 mA will be configured. Allowed

		    values are 60, 120, 180 and 240.

- qcom,cycle-counter-en

	Usage:      optional

	Value type: <empty>

	Definition: Enables the cycle counter feature.

- qcom,fg-force-load-profile

	Usage:      optional

	Value type: <empty>

	Definition: If set, battery profile will be force loaded if the profile

		    loaded earlier by bootloader doesn't match with the profile

		    available in the device tree.

- qcom,cl-start-capacity

	Usage:      optional

	Value type: <u32>

	Definition: Battery SOC threshold to start the capacity learning.

		    If this is not specified, then the default value used

		    will be 15.

- qcom,cl-min-temp

	Usage:      optional

	Value type: <u32>

	Definition: Lower limit of battery temperature to start the capacity

		    learning. If this is not specified, then the default value

		    used will be 150 (15 C). Unit is in decidegC.

- qcom,cl-max-temp

	Usage:      optional

	Value type: <u32>

	Definition: Upper limit of battery temperature to start the capacity

		    learning. If this is not specified, then the default value

		    used will be 500 (50 C). Unit is in decidegC.

- qcom,cl-max-increment

	Usage:      optional

	Value type: <u32>

	Definition: Maximum capacity increment allowed per capacity learning

		    cycle. If this is not specified, then the default value

		    used will be 5 (0.5%). Unit is in decipercentage.

- qcom,cl-max-decrement

	Usage:      optional

	Value type: <u32>

	Definition: Maximum capacity decrement allowed per capacity learning

		    cycle. If this is not specified, then the default value

		    used will be 100 (10%). Unit is in decipercentage.

- qcom,cl-min-limit

	Usage:      optional

	Value type: <u32>

	Definition: Minimum limit that the capacity cannot go below in a

		    capacity learning cycle. If this is not specified, then

		    the default value is 0. Unit is in decipercentage.

- qcom,cl-max-limit

	Usage:      optional

	Value type: <u32>

	Definition: Maximum limit that the capacity cannot go above in a

		    capacity learning cycle. If this is not specified, then

		    the default value is 0. Unit is in decipercentage.

- qcom,battery-thermal-coefficients

	Usage:      optional

	Value type: <u8>

	Definition: Byte array of battery thermal coefficients.

		    This should be exactly 3 bytes in length.

- qcom,fg-jeita-hyst-temp

	Usage:      optional

	Value type: <u32>

	Definition: Hysteresis applied to Jeita temperature comparison.

		    Possible values are:

			0 - No hysteresis

			1,2,3 - Value in Celsius.

- qcom,fg-batt-temp-delta

	Usage:      optional

	Value type: <u32>

	Definition: Battery temperature delta interrupt threshold. Possible

		    values are: 2, 4, 6 and 10. Unit is in Kelvin.

- qcom,hold-soc-while-full

	Usage:      optional

	Value type: <empty>

	Definition: A boolean property that when defined holds SOC at 100% when

		    the battery is full.

- qcom,linearize-soc

	Usage:      optional

	Value type: <empty>

	Definition: A boolean property that when defined linearizes SOC when

		    the SOC drops after charge termination monotonically to

		    improve the user experience. This is applicable only if

		    "qcom,hold-soc-while-full" is specified.

- qcom,ki-coeff-soc-dischg

	Usage:      optional

	Value type: <prop-encoded-array>

	Definition: Array of monotonic SOC threshold values to change the ki

		    coefficient for medium discharge current during discharge.

		    This should be defined in the ascending order and in the

		    range of 0-100. Array limit is set to 3.

- qcom,ki-coeff-med-dischg

	Usage:      optional

	Value type: <prop-encoded-array>

	Definition: Array of ki coefficient values for medium discharge current

		    during discharge. These values will be applied when the

		    monotonic SOC goes below the SOC threshold specified under

		    qcom,ki-coeff-soc-dischg. Array limit is set to 3. This

		    property should be specified if qcom,ki-coeff-soc-dischg

		    is specified to make it fully functional. Value has no

		    unit. Allowed range is 0 to 62200 in micro units.

- qcom,ki-coeff-hi-dischg

	Usage:      optional

	Value type: <prop-encoded-array>

	Definition: Array of ki coefficient values for high discharge current

		    during discharge. These values will be applied when the

		    monotonic SOC goes below the SOC threshold specified under

		    qcom,ki-coeff-soc-dischg. Array limit is set to 3. This

		    property should be specified if qcom,ki-coeff-soc-dischg

		    is specified to make it fully functional. Value has no

		    unit. Allowed range is 0 to 62200 in micro units.

- qcom,ki-coeff-full-dischg

	Usage:	    optional

	Value type: <u32>

	Definition: Ki coefficient full SOC value that will be applied during

		    discharging. If not specified, a value of 0 will be set.

		    Allowed range is from 245 to 62256.

- qcom,fg-rconn-mohms

	Usage:      optional

	Value type: <u32>

	Definition: Battery connector resistance (Rconn) in milliohms. If Rconn

		    is specified, then ESR to Rslow scaling factors will be

		    updated to account it for an accurate ESR.

- qcom,fg-esr-clamp-mohms

	Usage:      optional

	Value type: <u32>

	Definition: Equivalent series resistance (ESR) in milliohms. If this

		    is specified, then ESR will be clamped to this value when

		    ESR is found to be dropping below this. Default value is

		    20.

- qcom,fg-esr-filter-switch-temp

	Usage:      optional

	Value type: <u32>

	Definition: Battery temperature threshold below which low temperature

		    ESR filter coefficients will be switched to normal

		    temperature ESR filter coefficients. If this is not

		    specified, then the default value used will be 100. Unit is

		    in decidegC.

- qcom,fg-esr-tight-filter-micro-pct

	Usage:      optional

	Value type: <u32>

	Definition: Value in micro percentage for ESR tight filter. If this is

		    not specified, then a default value of 3907 (0.39 %) will

		    be used. Lowest possible value is 1954 (0.19 %).

- qcom,fg-esr-broad-filter-micro-pct

	Usage:      optional

	Value type: <u32>

	Definition: Value in micro percentage for ESR broad filter. If this is

		    not specified, then a default value of 99610 (9.96 %) will

		    be used. Lowest possible value is 1954 (0.19 %).

- qcom,fg-esr-tight-lt-filter-micro-pct

	Usage:      optional

	Value type: <u32>

	Definition: Value in micro percentage for low temperature ESR tight

		    filter. If this is not specified, then a default value of

		    48829 (4.88 %) will be used. Lowest possible value is 1954

		    (0.19 %).

- qcom,fg-esr-broad-lt-filter-micro-pct

	Usage:      optional

	Value type: <u32>

	Definition: Value in micro percentage for low temperature ESR broad

		    filter. If this is not specified, then a default value of

		    148438 (14.84 %) will be used. Lowest possible value is

		    1954 (0.19 %).

- qcom,fg-auto-recharge-soc

	Usage:      optional

	Value type: <empty>

	Definition: A boolean property when defined will configure automatic

		    recharge SOC threshold. If not specified, automatic

		    recharge voltage threshold will be configured. This has

		    to be configured in conjunction with the charger side

		    configuration for proper functionality.

- qcom,slope-limit-temp-threshold

	Usage:      optional

	Value type: <u32>

	Definition: Battery temperature threshold to decide when slope limit

		    coefficients should be applied along with charging status.

		    Unit is in decidegC.

- qcom,slope-limit-coeffs

	Usage:      optional

	Value type: <prop-encoded-array>

	Definition: A list of integers which holds the slope limit coefficients

		    in the following order. Allowed size is 4. Possible values

		    are from 0 to 31. Unit is in decipercentage.

		    Element 0 - Low temperature discharging

		    Element 1 - Low temperature charging

		    Element 2 - High temperature discharging

		    Element 3 - High temperature charging

		    These coefficients have to be specified along with the

		    property "qcom,slope-limit-temp-threshold" to make dynamic

		    slope limit adjustment functional.

- qcom,fg-bmd-en-delay-ms

	Usage:      optional

	Value type: <u32>

	Definition: The delay in ms for FG to enable BMD after reading RID.

==========================================================

Second Level Nodes - Peripherals managed by FG Gen3 driver

==========================================================

- reg

	Usage:      required

	Value type: <prop-encoded-array>

	Definition: Addresses and sizes for the specified peripheral

- interrupts

	Usage:      optional

	Value type: <prop-encoded-array>

	Definition: Interrupt mapping as per the interrupt encoding

- interrupt-names

	Usage:      optional

	Value type: <stringlist>

	Definition: Interrupt names.  This list must match up 1-to-1 with the

		    interrupts specified in the 'interrupts' property.

========

Example

========

pmi8998_fg: qpnp,fg {

	compatible = "qcom,fg-gen3";

	#address-cells = <1>;

	#size-cells = <1>;

	qcom,pmic-revid = <&pmi8998_revid>;

	io-channels = <&pmi8998_rradc 3>;

	io-channel-names = "rradc_batt_id";

	qcom,rradc-base = <0x4500>;

	qcom,ki-coeff-soc-dischg = <30 60 90>;

	qcom,ki-coeff-med-dischg = <800 1000 1400>;

	qcom,ki-coeff-hi-dischg = <1200 1500 2100>;

	qcom,slope-limit-temp-threshold = <100>;

	qcom,slope-limit-coeffs = <10 11 12 13>;

	qcom,battery-thermal-coefficients = [9d 50 ff];

	status = "okay";

	qcom,fg-batt-soc@4000 {

		status = "okay";

		reg = <0x4000 0x100>;

		interrupts = <0x2 0x40 0x0 IRQ_TYPE_EDGE_BOTH>,

			     <0x2 0x40 0x1 IRQ_TYPE_EDGE_BOTH>,

			     <0x2 0x40 0x2 IRQ_TYPE_EDGE_BOTH>,

			     <0x2 0x40 0x3 IRQ_TYPE_EDGE_BOTH>;

		interrupt-names = "soc-update",

				  "soc-ready",

				  "bsoc-delta",

				  "msoc-delta";

	};

	qcom,fg-batt-info@4100 {

		status = "okay";

		reg = <0x4100 0x100>;

		interrupts = <0x2 0x41 0x3 IRQ_TYPE_EDGE_BOTH>;

		interrupt-names = "batt-missing";

	};

	qcom,fg-memif@4400 {

		status = "okay";

		reg = <0x4400 0x100>;

	};

};

QPNP Qnovo pulse engine

QPNP Qnovo is a pulse charging engine which works in tandem with the QPNP SMB2

Charger device. It configures the QPNP SMB2 charger to charge/discharge as per

pulse characteristics.

The QPNP Qnovo pulse engine has a single peripheral assigned to it.

Required properties:

- compatible:		Must be "qcom,qpnp-qnovo"

- qcom,pmic-revid:	Should specify the phandle of PMIC

			revid module. This is used to identify

			the PMIC subtype.

- reg:			The address for this peripheral

- interrupts:		Specifies the interrupt associated with the peripheral.

- interrupt-names:	Specifies the interrupt name for the peripheral. Qnovo

			peripheral has only one interrupt "ptrain-done".

Optional Properties:

- qcom,external-rsense:		To indicate whether the platform uses external or

				internal rsense for measuring battery current.

- qcom,enable-for-dc:		To enable qnovo for dc charging path.

Example:

	qcom,qpnp-qnovo@1500 {

		compatible = "qcom,qpnp-qnovo";

		reg = <0x1500 0x100>;

		interrupts = <0x2 0x15 0x0 IRQ_TYPE_NONE>;

		interrupt-names = "ptrain-done";

		qcom,pmic-revid = <&pmi8998_revid>;

	};

Qualcomm Technologies, Inc. SMB1355 Charger Specific Bindings

SMB1355 slave charger is paired with QTI family of standalone chargers to

enable a high current, low profile Li+ battery charging system.

The device provides 28V DC withstand, wide operating input range of 3.8 to

14.2V for standard 5V USB inputs as well as a wide variety of HVDCP Travel

Adapters and is compatible with QTI's Quick Charge technology.

=======================

Required Node Structure

=======================

SMB1355 Charger must be described in two levels of device nodes.

==================================

First Level Node - SMB1355 Charger

==================================

Charger specific properties:

- compatible

  Usage:      required

  Value type: <string>

  Definition: "qcom,smb1355".

- qcom,pmic-revid

  Usage:      required

  Value type: phandle

  Definition: Should specify the phandle of SMB's revid module. This is used

	      to identify the SMB subtype.

- qcom,disable-ctm

  Usage:      optional

  Value type: <empty>

  Definition: boolean flag. Usually a thermistor near usb/typeC connector is

	      connected to AUX. Set this flag to indicate the thermistor

	      doesn't exist.

================================================

Second Level Nodes - SMB1355 Charger Peripherals

================================================

Peripheral specific properties:

- reg

  Usage:      required

  Value type: <prop-encoded-array>

  Definition: Address and size of the peripheral's register block.

- interrupts

  Usage:      required

  Value type: <prop-encoded-array>

  Definition: Peripheral interrupt specifier.

- interrupt-names

  Usage:      required

  Value type: <stringlist>

  Definition: Interrupt names.  This list must match up 1-to-1 with the

	      interrupts specified in the 'interrupts' property.

=======

Example

=======

smb1355_charger: qcom,smb1355-charger {

	compatible = "qcom,smb1355";

	#address-cells = <1>;

	#size-cells = <1>;

	qcom,chgr@1000 {

		reg = <0x1000 0x100>;

		interrupts = <0x10 0x1 IRQ_TYPE_EDGE_BOTH>;

		interrupt-names = "chg-state-change";

	};

	qcom,chgr-misc@1600 {

		reg = <0x1600 0x100>;

		interrupts = <0x16 0x1 IRQ_TYPE_EDGE_BOTH>;

		interrupt-names = "wdog-bark";

	};

};