power: smb1351-charger: Add SMB1351 charger driver

Summit smb1351 battery charger

SMB1351 is a single-cell battery charger. It can charge

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

The smb1351 interface is via I2C bus.

Required Properties:

- compatible			Must be "qcom,smb1351-charger".

- reg				The device 7-bit I2C address.

Required Properties for standalone charger:

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

- pinctrl-names			The state name of the pin configuration. Only

				support "default".

- pinctrl-0			The phandle of the pin configuration node in

				pinctrl for smb_int_pin.

Optional Properties:

- interrupts			This indicates the IRQ number of the GPIO

				connected to the STAT pin.

- qcom,fastchg-current-max-ma 	Fast Charging current in mA. Supported range is

				from 1000mA to 4500mA.

- qcom,chg-autonomous-mode	This is a bool property and it indicates that the

				charger is configured for autonomous operation and

				does not require any software configuration.

- qcom,disable-apsd		This is a bool property which disables automatic

				power source detection (APSD). If this is set

				charger detection is done by DCIN UV irq.

- qcom,charging-disabled	This is a bool property which disables charging.

- qcom,bms-psy-name		This is a string and it points to the bms

				power supply name.

- qcom,iterm-ma			Specifies the termination current to indicate end-of-charge.

				Possible values in mA - 70, 100, 200, 300, 400, 500, 600, 700.

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

				property.

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

				the battery is charged. Supported range 3500mV to 4500mV

- qcom,recharge-mv		Recharge threshold in mV - the offset from the float-volatge

				as which the charger restarts charging. Possible

				values are 50mV and 100mV.

- qcom,recharge-disabled	Boolean value which disables the auto-recharge.

- qcom,bms-controlled-charging	This property enables BMS to control EOC and

				recharge. BMS and charger communicates with each

				other via power_supply framework. This

				property should be used with 'qcom,iterm-disabled'

				to ensure EOC detection in charger is disabled.

- qcom,parallel-charger		Boolean value which enables the parallel charger.

Example for standalone charger:

&i2c_4 {

	smb1351_otg_supply: smb1351-charger@1d {

		compatible = "qcom,smb1351-charger";

		reg = <0x1d>;

		interrupt-parent = <&msm_gpio>;

		interrupts = <62 2>;

		pinctrl-names = "default";

		pinctrl-0 = <&smb_int_default>;

		qcom,float-voltage-mv = <4350>;

		qcom,iterm-ma = <100>;

		qcom,recharge-mv = <100>;

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

		regulator-name = "smb1351_otg_vreg";

	};

};

Example for parallel charger:

&i2c_11 {

	smb1351-charger@1d {

		compatible = "qcom,smb1351-charger";

		reg = <0x1d>;

		qcom,parallel-charger;

		qcom,float-voltage-mv = <4400>;

		qcom,recharge-mv = <100>;

	};

};

	 control and charge-current limiting. The driver controls SMB349

	 via I2C in STAT IRQ driven mode and supports device-tree interface.

config SMB1351_USB_CHARGER

	tristate "smb1351 usb charger (with VBUS detection)"

	depends on I2C

	help

	 Say Y to enable support for the SMB1351 switching mode based charger.

	 The driver supports charging control (enable/disable) and

	 charge-current limiting. It also provides USB VBUS detection and

	 notification support. The driver controls SMB1351 via I2C and

	 supports device-tree interface.

config SMB350_CHARGER

	tristate "smb350 charger"

	depends on I2C

obj-$(CONFIG_POWER_AVS)		+= avs/

obj-$(CONFIG_SMB349_USB_CHARGER)   += smb349-charger.o

obj-$(CONFIG_SMB349_DUAL_CHARGER)   += smb349-dual-charger.o

obj-$(CONFIG_SMB1351_USB_CHARGER) += smb1351-charger.o

obj-$(CONFIG_SMB350_CHARGER)   += smb350_charger.o

obj-$(CONFIG_SMB135X_CHARGER)   += smb135x-charger.o

obj-$(CONFIG_SMB1360_CHARGER_FG) += smb1360-charger-fg.o