power: qpnp-smbcharger: add the qpnp smbcharger driver

QPNP SMB Battery Charger

QPNP SMB Charger is a single-cell switching mode battery charger. It can charge

the battery and power the system via the USB and AC adapter input.

The QPNP SMB Charger interfaces via the SPMI bus.

There are six 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,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 safety timers

			and SYSOK pin control

- qcom,chg-otg:		OTG configuration control.

Parent node required properties:

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

- spmi-dev-container:	Must be included in the parent node to set up the spmi

			sub node devices.

- #address-cells:	Must be <1>

- #size-cells:		Must be <1>

Sub node required properties:

- reg:			The SPMI address 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,chgr:

			 - chg-tcc-thr:		Triggers on charge completion.

			 - chg-taper-thr:	Triggers on the taper charge

						transtion.

			 - chg-inhibit:		Notifies on battery voltage

						being too high to resume

						charging.

			 - chg-rechg-thr:	Triggers on battery voltage

						falling below the resume

						threshold.

			qcom,bat-if:

			 - batt-hot:		Triggers on battery temperature

						hitting the hot threshold.

						Charging stops.

			 - batt-warm:		Triggers on battery temperature

						hitting the warm threshold.

						Charging current is reduced.

			 - batt-cool:		Triggers on battery temperature

						hitting the cool threshold.

						Charging current is reduced

			 - batt-cold:		Triggers on battery temperature

						hitting the cold threshold.

						Charging stops.

			 - batt-missing:	Battery missing status

						interrupt.

			 - batt-low:		Triggers on battery voltage

						falling across a low threshold.

			qcom,usb-chgpth:

			 - usbin-uv:		USB input voltage falls below a

						valid threshold.

			 - usbin-src-det:	USB automatic source detection

						finishes.

			qcom,dc-chgpth:

			 - dcin-uv:		DC input voltage falls below a

						valid threshold.

			qcom,chgr-misc:

			 - safety-timeout-mins:	Charger watchdog timer

						interrupt.

			 - temp-shutdown:	Triggers when charger goes

						overtemp and causes a shutdown.

			 - power-ok:		Triggers when the charger

						switcher turns on or off.

Optional Properties:

- qcom,battery-psy-name		The name of the main battery power supply that

				the charger will register. Failing to define

				this property will default the name to

				"battery".

- qcom,bms-psy-name		The psy name to use for reporting battery

				capacity. If left unspecified the capacity uses

				a preprogrammed default value of 50.

- qcom,float-voltage-mv		Float Voltage in mV - the maximum voltage up

				to which the battery is charged. Supported

				range 3600mV to 4500mV

- qcom,charging-timeout-mins	Maximum duration in minutes that a single

				charge cycle may last.  Supported values are:

				0, 192, 384, 768, and 1536.  A value of 0

				means that no charge cycle timeout is used and

				charging can continue indefinitely.

- qcom,precharging-timeout-mins	Maximum duration in minutes that a single

				precharge cycle may last.  Supported values

				are: 0, 24, 48, 96, 192.  A value of 0 means

				that no precharge cycle timeout is used and

				charging can continue indefinitely. Note that

				the qcom,charging-timeout-mins property must

				be specified in order for this to take effect.

- qcom,dc-psy-type		The type of charger connected to the DC path.

				Can be "Mains" or "Wireless"

- qcom,dc-psy-ma		The current in mA dc path can support. Must be

				specified if dc-psy-type is specified. Valid

				range 300mA to 2000mA.

- qcom,charging-disabled	Set this if charging should be disabled in the

				build by default.

- qcom,resume-delta-mv		Specifies the minimum voltage drop in

				millivolts below the float voltage that is

				required in order to initiate a new charging

				cycle. Supported values are: 50, 100, 200 and

				300mV.

- qcom,bmd-algo-disabled	Indicates if the battery missing detection

				algorithm is disabled. If this node is present

				SMB uses the THERM pin for battery missing

				detection.

- qcom,bmd-pin-src		A string that indicates the source pin for the

				battery missind detection. This can be either:

				- "bpd_none"

					battery is considered always present

				- "bpd_id"

					battery id pin is used

				- "bpd_thm"

					battery therm pin is used

				- "bpd_thm_id"

					both pins are used (battery is

					considered missing if either pin is

					floating).

- qcom,iterm-ma			Specifies the termination current to indicate

				end-of-charge. Possible values in mA:

				50, 100, 150, 200, 250, 300, 500, 600.

- qcom,iterm-disabled		Disables the termination current feature. This

				is a boolean property.

- regulator-name		A string used as a descriptive name for OTG

				regulator.

- qcom,thermal-mitigation:	Array of input current limit values for

				different system thermal mitigation levels.

				This should be a flat array that denotates the

				maximum charge current in mA for each thermal

				level.

- qcom,soft-vfloat-comp-disabled	Set this property when the battery is

					powered via external source and could

					go above the float voltage.

Example:

	qcom,qpnp-smbcharger {

		spmi-dev-container;

		compatible = "qcom,qpnp-smbcharger";

		#address-cells = <1>;

		#size-cells = <1>;

		qcom,iterm-ma = <100>;

		qcom,float-voltage-mv = <4200>;

		qcom,resume-delta-mv = <100>;

		qcom,bmd-pin-src = "bpd_thm_id";

		qcom,dc-psy-type = "Mains";

		qcom,dc-psy-ma = <1500>;

		qcom,bms-psy-name = "bms";

		qcom,battery-psy-name = "battery";

		qcom,thermal-mitigation = <1500 700 600 325>;

		qcom,chgr@1000 {

			reg = <0x1000 0x100>;

			interrupts =	<0x2 0x10 0x0>,

					<0x2 0x10 0x1>,

					<0x2 0x10 0x2>,

					<0x2 0x10 0x3>,

					<0x2 0x10 0x4>,

					<0x2 0x10 0x5>,

					<0x2 0x10 0x6>,

					<0x2 0x10 0x7>;

			interrupt-names =	"chg-error",

						"chg-inhibit",

						"chg-prechg-sft",

						"chg-complete-chg-sft",

						"chg-p2f-thr",

						"chg-rechg-thr",

						"chg-taper-thr",

						"chg-tcc-thr";

		};

		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",

						"safety-timeout",

						"flash-fail",

						"otst2",

						"otst3";

		};

	};

	  also offers relevant information to userspace via the power supply

	  framework.

config QPNP_SMBCHARGER

	tristate "QPNP SMB Charger driver"

	depends on SPMI

	depends on OF_SPMI

	help

	  Say Y here to enable the dual path switch mode battery charger which

	  supports USB detection and battery charging up to 3A.

	  The driver also offers relevant information to userspace via the

	  power supply framework.

config PM8921_BMS

	tristate "PM8921 Battery Monitoring System driver"

	depends on MFD_PM8921_CORE

obj-$(CONFIG_QPNP_VM_BMS)	+= qpnp-vm-bms.o batterydata-lib.o batterydata-interface.o

obj-$(CONFIG_QPNP_CHARGER)	+= qpnp-charger.o

obj-$(CONFIG_QPNP_LINEAR_CHARGER)	+= qpnp-linear-charger.o

obj-$(CONFIG_QPNP_SMBCHARGER)	+= qpnp-smbcharger.o

obj-$(CONFIG_CHARGER_SMB347)	+= smb347-charger.o

obj-$(CONFIG_CHARGER_TPS65090)	+= tps65090-charger.o

obj-$(CONFIG_BATTERY_BCL)	+= battery_current_limit.o