Qualcomm Technologies, Inc. SMB5 Charger Specific Bindings

SMB5 Charger is an efficient programmable battery charger capable of charging a
high-capacity lithium-ion battery over micro-USB or USB Type-C ultrafast with
Quick Charge 2.0, Quick Charge 3.0, and USB Power Delivery support. Wireless
charging features full A4WP Rezence 1.2, WPC 1.2, and PMA support.

=======================
Required Node Structure
=======================

SMB5 Charger must be described in two levels of devices nodes.

===============================
First Level Node - SMB5 Charger
===============================

Charger specific properties:
- compatible
  Usage:      required
  Value type: <string>
  Definition: "qcom,pm8150-smb5" for SMB5 on PM8150.
	      "qcom,pm7250b-smb5" for SMB5 on PM7250B.
	      "qcom,pm6150-smb5" for SMB5 on PM6150.
	      "qcom,pmi632-smb5" for SMB5 on PMI632.

- #io-channel-cells:
    Usage: required
    Value type: <u32>
    Definition: Number of cells in an IIO specifier.
            Needed to indicate other clients can query charger for
            IIO channels.
            For details about IIO bindings see:
            Documentation/devicetree/bindings/iio/iio-bindings.txt

- qcom,sec-charger-config
  Usage:      optional
  Value type: <u32>
  Definition: Specify how the secondary chargers are configured.
		0 - No secondary charger.
		1 - Charge Pump SMB1390.
		2 - SMB1355 parallel charger.
		3 - Both Charge Pump and SMB1355.
		If the value is not present, 0 is used as default.

- io-channels
- io-channel-names
  Usage:      optional
  Value type: <phandle>
  Definition: For details about IIO bindings see:
		Documentation/devicetree/bindings/iio/iio-bindings.txt

- qcom,batteryless-platform
  Usage:      optional
  Value type: <empty>
  Definition: Boolean flag which indicates that the platform does not have a
		battery, and therefore charging should be disabled. In
		addition battery properties will be faked such that the device
		assumes normal operation.

- qcom,charger-temp-max
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the charger temp REG_H_THRESHOLD for PM8150B in deciDegC.
		If the value is not present, use the setting read from the device.

- qcom,smb-temp-max
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the charger temp REG_H_THRESHOLD for SMB1355 in deciDegC.
		If the value is not present, use the setting read from the device.

- qcom,fcc-max-ua
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the maximum fast charge current in micro-amps.
		If the value is not present, 1Amp is used as default.

- qcom,fv-max-uv
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the maximum float voltage in micro-volts.
		If the value is not present, 4.35V is used as default.

- qcom,usb-icl-ua
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the USB input current limit in micro-amps.
		 If the value is not present, 1.5Amps is used as default.

- qcom,usb-ocl-ua
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the OTG output current limit in micro-amps.
		If the value is not present, 1.5Amps is used as default.

- qcom,dc-icl-ua
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the DC input current limit in micro-amps.

- qcom,boost-threshold-ua
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the boost current threshold in micro-amps.
		If the value is not present, 100mA is used as default.

- qcom,thermal-mitigation
  Usage:      optional
  Value type: Array of <u32>
  Definition: Array of fast charge current limit values for
		different system thermal mitigation levels.
		This should be a flat array that denotes the
		maximum charge current in mA for each thermal
		level.

- qcom,float-option
  Usage:      optional
  Value type: <u32>
  Definition: Configures how the charger behaves when a float charger is
	      detected by APSD.
	        1 - Treat as a DCP.
	        2 - Treat as a SDP.
	        3 - Disable charging.
	        4 - Suspend USB input.

- qcom,hvdcp-disable
  Usage:      optional
  Value type: <empty>
  Definition: Specifies if hvdcp charging is to be enabled or not.
		If this property is not specified hvdcp will be enabled.
		If this property is specified, hvdcp 2.0 detection will still
		happen but the adapter won't be asked to switch to a higher
		voltage point.

- qcom,chg-inhibit-threshold-mv
  Usage:      optional
  Value type: <u32>
  Definition: Charge inhibit threshold in milli-volts. Charging will be
		inhibited when the battery voltage is within this threshold
		from Vfloat at charger insertion. If this is not specified
		then charge inhibit will be disabled by default.
		Allowed values are: 50, 100, 200, 300.

- qcom,chg-term-src
  Usage:      optional
  Value type: <u32>
  Definition: Specify either the ADC or analog comparators to be used in order
		to set threshold values for charge termination current.
		0 - Unspecified
		1 - Select ADC comparator
		2 - Select ANALOG comparator

- qcom,chg-term-current-ma
  Usage:      optional
  Value type: <u32>
  Definition: When ADC comparator is selected as qcom,chg-term-src, this
		parameter should be set to the desired upper threshold.

- qcom,chg-term-base-current-ma
  Usage:      optional
  Value type: <u32>
  Definition: When ADC comparator is selected as qcom,chg-term-src, this
		parameter should be set to the desired lower threshold.

- qcom,auto-recharge-soc
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the SOC threshold at which the charger will
		restart charging after termination. The value specified
		ranges from 0 - 100. The feature is enabled if this
		property is specified with a valid SOC value.

- qcom,auto-recharge-vbat-mv
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the battery voltage threshold at which the charger
		will restart charging after termination. The value specified
		is in milli-volts.

- qcom,suspend-input-on-debug-batt
  Usage:      optional
  Value type: <empty>
  Definition: Boolean flag which when present enables input suspend for
		debug battery.

- qcom,fake-chg-status-on-debug-batt
  Usage:      optional
  Value type: <empty>
  Definition: Boolean flag which when present shows charging status as
		unknown for debug battery. This needs to be specified only if
		the device needs to be kept powered on always with
		"svc power stayon true".

- qcom,min-freq-khz
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the minimum charger buck/boost switching frequency
		in KHz. It overrides the min frequency defined for the charger.

- qcom,max-freq-khz
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the maximum charger buck/boost switching frequency in
		 KHz. It overrides the max frequency defined for the charger.

- qcom,otg-deglitch-time-ms
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the deglitch interval for OTG detection.
		If the value is not present, 50 msec is used as default.

- qcom,step-charging-enable
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which when present enables step-charging.

- qcom,typec-legacy-rp-icl
  Usage:       optional
  Value type:  bool
  Definition:  Boolean property to enable setting ICL based on Rp for
		Type-C non-compliant legacy cables.

- qcom,wd-bark-time-secs
  Usage:      optional
  Value type: <u32>
  Definition: WD bark-timeout in seconds. The possible values are
		16, 32, 64, 128. If not defined it defaults to 64.

- qcom,sw-jeita-enable
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which when present enables sw compensation for
		jeita.

- qcom,battery-data
  Usage:      optional
  Value type: <phandle>
  Definition: Specifies the phandle of the node which contains the battery
		profiles supported on the device.

- qcom,flash-derating-soc
  Usage:      optional
  Value type: <u32>
  Definition: SOC threshold in percentage below which hardware will start
		derating flash. This is only applicable to certain PMICs like
		PMI632 which has SCHGM_FLASH peripheral.

- qcom,flash-disable-soc
  Usage:      optional
  Value type: <u32>
  Definition: SOC threshold in percentage below which hardware will disable
		flash. This is only applicable to certain PMICs like PMI632
		which has SCHGM_FLASH peripheral.

- qcom,headroom-mode
  Usage:      optional
  Value type: <u32>
  Definition: Specifies flash hardware headroom management policy. The
		possible values are:
		<0>: Fixed mode, constant 5V at flash input.
		<1>: Adaptive mode allows charger output voltage to be
		dynamically controlled by the flash module based on the
		required flash headroom.
		This is only applicable to certain PMICs like PMI632 which
		has SCHGM_FLASH peripheral.

- qcom,fcc-stepping-enable
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which when present enables stepwise change in FCC.
		The default stepping rate is 100mA/sec.

- qcom,disable-suspend-on-collapse
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which when present disables suspend on collapse
		feature of charger hardware.

- qcom,uusb-moisture-protection-enable
	Usage:      optional
	Value type: bool
	Definition: Boolean flag which when present enables mositure protection
		    feature for uUSB connector type.

- qcom,hvdcp-autonomous-enable
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which when present enables hardware-controlled
		operation of HVDCP.

- qcom,usb-pd-disable
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which when present disables USB-PD operation.

- qcom,lpd-disable
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which when present disables liquid presence
		detection.

- qcom,hw-die-temp-mitigation
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which when present enables h/w based thermal
		mitigation.

- qcom,hw-connector-mitigation
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which when present enables h/w based
		connector temperature mitigation.

- qcom,hw-skin-temp-mitigation
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which when present enables h/w based skin
		temperature mitigation.

- qcom,en-skin-therm-mitigation
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which when present enables skin
		thermal mitigation.

- qcom,connector-internal-pull-kohm
  Usage:      optional
  Value type: <u32>
  Definition: Specifies internal pull-up configuration to be applied to
		connector THERM. The only valid values are (0/30/100/400).
		If not specified 100K is used as default pull-up.

- qcom,smb-internal-pull-kohm
  Usage:      optional
  Value type: <u32>
  Definition: Specifies internal pull-up configuration to be applied to
		connector THERM, only valid values are (0/30/100/400).
		If not specified 100K is used as default pull-up.

- qcom,wd-snarl-time-config
  Usage:      optional
  Value type: <u32>
  Definition: WDOG snarl timeout configuration value. The possible values are
		0 to 7, where 0 = 62.5ms, 1 = 125ms, 2 = 250ms, 3 = 500ms,
		4 = 1s, 5 = 2s, 6 = 4s and 7 = 8s. If not defined, wdog-snarl
		irq is disabled by default.

- qcom,adc-based-aicl
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which when present enables ADC based AICL.

- qcom,wls-current-max-ua
  Usage:      optional
  Value type: <u32>
  Definition: Upper limit of charging current supplied by the wireless charger.
		If left unspecified, the HW min value of 1.5 A is applied by
		default.

- qcom,fcc-step-delay-ms
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the delay between each step of FCC stepper algorithm.
		If left unspecified, the default value is 1 Sec.

- qcom,fcc-step-size-ua
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the step size of each step of FCC stepper algorithm.
		If left unspecified, the default value is 100mA.

- qcom,hvdcp2-max-icl-ua
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the maximum input current limit that can be configured
		for HVDCP2 adapter.
		If left unspecified, the default value is 3000mA.

- qcom,hvdcp3-max-icl-ua
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the maximum input current limit that can be configured
		for HVDCP3 adapter.
		If left unspecified, the default value is 3000mA.

- qcom,hvdcp3-standalone-config
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which when present indicates that the charging is
		only done by the main charger (standalone, no CP) with a QC 3.0
		adapter.

- qcom,disable-fcc-restriction
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which when present disables FCC restriction.

- qcom,jeita-arb-enable
  Usage:      optional
  Value type: bool
  Definition: Boolean flag which indicates if JETIA ARB handling when
		Vjeita > Vbatt is enabled.

=============================================
Second Level Nodes - SMB5 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
=======

pm8150b_charger: qcom,qpnp-smb5 {
	compatible = "qcom,qpnp-smb5";
	#address-cells = <1>;
	#size-cells = <1>;
	#io-channel-cells = <1>;

	dpdm-supply = <&qusb_phy0>;

	qcom,sec-charger-config = <1>;

	io-channels = <&pm8150b_vadc ADC_USB_IN_V_16>,
	              <&pm8150b_vadc ADC_USB_IN_I>,
	              <&pm8150b_vadc ADC_CHG_TEMP>,
	              <&pm7250b_qg PSY_IIO_RESISTANCE_ID>,
	              <&pm7250b_qg PSY_IIO_CHARGE_COUNTER>,
	              <&pm7250b_qg PSY_IIO_CHARGE_FULL>;
	io-channel-names = "usb_in_voltage",
	                   "usb_in_current",
	                   "chg_temp",
	                   "resistance_id",
	                   "charge_counter",
	                   "charge_full";

	qcom,chgr@1000 {
		reg = <0x1000 0x100>;
		interrupts =	<0x2 0x10 0x0 IRQ_TYPE_NONE>,
				<0x2 0x10 0x1 IRQ_TYPE_NONE>,
				<0x2 0x10 0x2 IRQ_TYPE_NONE>,
				<0x2 0x10 0x3 IRQ_TYPE_NONE>,
				<0x2 0x10 0x4 IRQ_TYPE_NONE>;

		interrupt-names =	"chg-error",
					"chg-state-change",
					"step-chg-state-change",
					"step-chg-soc-update-fail",
					"step-chg-soc-update-request";
	};

	qcom,otg@1100 {
		reg = <0x1100 0x100>;
		interrupts =	<0x2 0x11 0x0 IRQ_TYPE_NONE>,
				<0x2 0x11 0x1 IRQ_TYPE_NONE>,
				<0x2 0x11 0x2 IRQ_TYPE_NONE>,
				<0x2 0x11 0x3 IRQ_TYPE_NONE>;

		interrupt-names =	"otg-fail",
					"otg-overcurrent",
					"otg-oc-dis-sw-sts",
					"testmode-change-detect";
	};

	qcom,bat-if@1200 {
		reg = <0x1200 0x100>;
		interrupts =	<0x2 0x12 0x0 IRQ_TYPE_NONE>,
				<0x2 0x12 0x1 IRQ_TYPE_NONE>,
				<0x2 0x12 0x2 IRQ_TYPE_NONE>,
				<0x2 0x12 0x3 IRQ_TYPE_NONE>,
				<0x2 0x12 0x4 IRQ_TYPE_NONE>,
				<0x2 0x12 0x5 IRQ_TYPE_NONE>;

		interrupt-names =	"bat-temp",
					"bat-ocp",
					"bat-ov",
					"bat-low",
					"bat-therm-or-id-missing",
					"bat-terminal-missing";
	};

	qcom,usb-chgpth@1300 {
		reg = <0x1300 0x100>;
		interrupts =	<0x2 0x13 0x0 IRQ_TYPE_NONE>,
				<0x2 0x13 0x1 IRQ_TYPE_NONE>,
				<0x2 0x13 0x2 IRQ_TYPE_NONE>,
				<0x2 0x13 0x3 IRQ_TYPE_NONE>,
				<0x2 0x13 0x4 IRQ_TYPE_NONE>,
				<0x2 0x13 0x5 IRQ_TYPE_NONE>,
				<0x2 0x13 0x6 IRQ_TYPE_NONE>,
				<0x2 0x13 0x7 IRQ_TYPE_NONE>;

		interrupt-names =	"usbin-collapse",
					"usbin-lt-3p6v",
					"usbin-uv",
					"usbin-ov",
					"usbin-plugin",
					"usbin-src-change",
					"usbin-icl-change",
					"type-c-change";
	};

	qcom,dc-chgpth@1400 {
		reg = <0x1400 0x100>;
		interrupts =	<0x2 0x14 0x0 IRQ_TYPE_NONE>,
				<0x2 0x14 0x1 IRQ_TYPE_NONE>,
				<0x2 0x14 0x2 IRQ_TYPE_NONE>,
				<0x2 0x14 0x3 IRQ_TYPE_NONE>,
				<0x2 0x14 0x4 IRQ_TYPE_NONE>,
				<0x2 0x14 0x5 IRQ_TYPE_NONE>,
				<0x2 0x14 0x6 IRQ_TYPE_NONE>;

		interrupt-names =	"dcin-collapse",
					"dcin-lt-3p6v",
					"dcin-uv",
					"dcin-ov",
					"dcin-plugin",
					"div2-en-dg",
					"dcin-icl-change";
	};

	qcom,chgr-misc@1600 {
		reg = <0x1600 0x100>;
		interrupts =	<0x2 0x16 0x0 IRQ_TYPE_NONE>,
				<0x2 0x16 0x1 IRQ_TYPE_NONE>,
				<0x2 0x16 0x2 IRQ_TYPE_NONE>,
				<0x2 0x16 0x3 IRQ_TYPE_NONE>,
				<0x2 0x16 0x4 IRQ_TYPE_NONE>,
				<0x2 0x16 0x5 IRQ_TYPE_NONE>,
				<0x2 0x16 0x6 IRQ_TYPE_NONE>,
				<0x2 0x16 0x7 IRQ_TYPE_NONE>;

		interrupt-names =	"wdog-snarl",
					"wdog-bark",
					"aicl-fail",
					"aicl-done",
					"high-duty-cycle",
					"input-current-limiting",
					"temperature-change",
					"switcher-power-ok";
	};

	qcom,schgm-flash@a600 {
		reg = <0xa600 0x100>;
		interrupts =	<0x2 0xa6 0x0 IRQ_TYPE_NONE>,
				<0x2 0xa6 0x1 IRQ_TYPE_NONE>,
				<0x2 0xa6 0x2 IRQ_TYPE_NONE>,
				<0x2 0xa6 0x3 IRQ_TYPE_NONE>,
				<0x2 0xa6 0x4 IRQ_TYPE_NONE>,
				<0x2 0xa6 0x5 IRQ_TYPE_NONE>,
				<0x2 0xa6 0x6 IRQ_TYPE_NONE>,
				<0x2 0xa6 0x7 IRQ_TYPE_NONE>;

		interrupt-names =	"flash-en",
					"torch-req",
					"flash-state-change",
					"vout-up",
					"vout-down",
					"ilim1-s1",
					"ilim2-s2",
					"vreg-ok";
	};
};
