Qualcomm Technologies, Inc. SMB2 Charger Specific Bindings

SMB2 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
=======================

SMB2 Charger must be described in two levels of devices nodes.

===============================
First Level Node - SMB2 Charger
===============================

Charger specific properties:
- compatible
  Usage:      required
  Value type: <string>
  Definition: "qcom,qpnp-smb2".

- qcom,pmic-revid
  Usage:      required
  Value type: phandle
  Definition: Should specify the phandle of PMI's revid module. This is used to
		identify the PMI subtype.

- 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,use-extcon
  Usage:      optional
  Value type: <empty>
  Definition: Boolean flag which specify that SMB2 will act as main charger
	      to do extcon USB calls. If not defined, other charger driver can
	      act as main charger to do extcon USB calls.

- 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,wipower-max-uw
  Usage:      optional
  Value type: <u32>
  Definition: Specifies the DC input power limit in micro-watts.
		If the value is not present, 8W 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.

- google,wlc-thermal-mitigation
  Usage:      optional
  Value type: Array of <u32>
  Definition: Array of DC input current limit values for
		different system thermal mitigation levels.
		This should be a flat array that denotes the
		maximum DC input current in micro-amps for each
                thermal level.

- io-channels
  Usage:      optional
  Value type: List of <phandle u32>
  Definition: List of phandle and IIO specifier pairs, one pair
		for each IIO input to the device. Note: if the
		IIO provider specifies '0' for #io-channel-cells,
		then only the phandle portion of the pair will appear.

- io-channel-names
  Usage:      optional
  Value type: List of <string>
  Definition: List of IIO input name strings sorted in the same
		order as the io-channels property. Consumer drivers
		will use io-channel-names to match IIO input names
		with IIO specifiers.

- 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,auto-recharge-soc
  Usage:      optional
  Value type: <empty>
  Definition: Specifies if automatic recharge needs to be based off battery
		SOC. If this property is not specified, then auto recharge will
		be based off battery voltage. For both SOC and battery voltage,
		charger receives the signal from FG to resume charging.

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

- 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,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: <u32>
  Definition: Specifies the phandle of the node which contains the battery
		profiles supported on the device. This is only specified
		when step charging and sw-jeita configurations are desired
		to be get from these properties defined in battery profile:
		qcom,step-chg-ranges, qcom,jeita-fcc-ranges, qcom,jeita-fv-ranges.

=============================================
Second Level Nodes - SMB2 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
=======

pmi8998_charger: qcom,qpnp-smb2 {
	compatible = "qcom,qpnp-smb2";
	#address-cells = <1>;
	#size-cells = <1>;

	io-channels = <&pmic_rradc 0>;
	io-channel-names = "rradc_batt_id";

	dpdm-supply = <&qusb_phy0>;

	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";
	};
};