xref: /kernel/linux/linux-5.10/Documentation/devicetree/bindings/power/supply/qcom_smbb.txt

Qualcomm Switch-Mode Battery Charger and Boost

PROPERTIES
- compatible:
  Usage: required
  Value type: <stringlist>
  Description: Must be one of:
               - "qcom,pm8941-charger"

- reg:
  Usage: required
  Value type: <prop-encoded-array>
  Description: Base address of registers for SMBB block

- interrupts:
  Usage: required
  Value type: <prop-encoded-array>
  Description: The format of the specifier is defined by the binding document
               describing the node's interrupt parent.  Must contain one
               specifier for each of the following interrupts, in order:
               - charge done
               - charge fast mode
               - charge trickle mode
               - battery temperature ok
               - battery present
               - charger disconnected
               - USB-in valid
               - DC-in valid

- interrupt-names:
  Usage: required
  Value type: <stringlist>
  Description: Must contain the following list, strictly ordered:
               "chg-done",
               "chg-fast",
               "chg-trkl",
               "bat-temp-ok",
               "bat-present",
               "chg-gone",
               "usb-valid",
               "dc-valid"

- qcom,fast-charge-current-limit:
  Usage: optional (default: 1A, or pre-configured value)
  Value type: <u32>; uA; range [100mA : 3A]
  Description: Maximum charge current; May be clamped to safety limits.

- qcom,fast-charge-low-threshold-voltage:
  Usage: optional (default: 3.2V, or pre-configured value)
  Value type: <u32>; uV; range [2.1V : 3.6V]
  Description: Battery voltage limit above which fast charging may operate;
               Below this value linear or switch-mode auto-trickle-charging
               will operate.

- qcom,fast-charge-high-threshold-voltage:
  Usage: optional (default: 4.2V, or pre-configured value)
  Value type: <u32>; uV; range [3.24V : 5V]
  Description: Battery voltage limit below which fast charging may operate;
               The fast charger will attempt to charge the battery to this
               voltage.  May be clamped to safety limits.

- qcom,fast-charge-safe-voltage:
  Usage: optional (default: 4.2V, or pre-configured value)
  Value type: <u32>; uV; range [3.24V : 5V]
  Description: Maximum safe battery voltage; May be pre-set by bootloader, in
               which case, setting this will harmlessly fail. The property
               'fast-charge-high-watermark' will be clamped by this value.

- qcom,fast-charge-safe-current:
  Usage: optional (default: 1A, or pre-configured value)
  Value type: <u32>; uA; range [100mA : 3A]
  Description: Maximum safe battery charge current; May pre-set by bootloader,
               in which case, setting this will harmlessly fail. The property
               'qcom,fast-charge-current-limit' will be clamped by this value.

- qcom,auto-recharge-threshold-voltage:
  Usage: optional (default: 4.1V, or pre-configured value)
  Value type: <u32>; uV; range [3.24V : 5V]
  Description: Battery voltage limit below which auto-recharge functionality
               will restart charging after end-of-charge;  The high cutoff
               limit for auto-recharge is 5% above this value.

- qcom,minimum-input-voltage:
  Usage: optional (default: 4.3V, or pre-configured value)
  Value type: <u32>; uV; range [4.2V : 9.6V]
  Description: Input voltage level above which charging may operate

- qcom,dc-current-limit:
  Usage: optional (default: 100mA, or pre-configured value)
  Value type: <u32>; uA; range [100mA : 2.5A]
  Description: Default DC charge current limit

- qcom,disable-dc:
  Usage: optional (default: false)
  Value type: boolean: <u32> or <empty>
  Description: Disable DC charger

- qcom,jeita-extended-temp-range:
  Usage: optional (default: false)
  Value type: boolean: <u32> or <empty>
  Description: Enable JEITA extended temperature range;  This does *not*
               adjust the maximum charge voltage or current in the extended
               temperature range.  It only allows charging when the battery
               is in the extended temperature range.  Voltage/current
               regulation must be done externally to fully comply with
               the JEITA safety guidelines if this flag is set.

- usb_otg_in-supply:
  Usage: optional
  Value type: <phandle>
  Description: Reference to the regulator supplying power to the USB_OTG_IN
               pin.

child nodes:
- otg-vbus:
  Usage: optional
  Description: This node defines a regulator used to control the direction
               of VBUS voltage - specifically: whether to supply voltage
               to VBUS for host mode operation of the OTG port, or allow
               input voltage from external VBUS for charging.  In the
               hardware, the supply for this regulator comes from
               usb_otg_in-supply.

EXAMPLE
charger@1000 {
       compatible = "qcom,pm8941-charger";
       reg = <0x1000 0x700>;
       interrupts = <0x0 0x10 7 IRQ_TYPE_EDGE_BOTH>,
                       <0x0 0x10 5 IRQ_TYPE_EDGE_BOTH>,
                       <0x0 0x10 4 IRQ_TYPE_EDGE_BOTH>,
                       <0x0 0x12 1 IRQ_TYPE_EDGE_BOTH>,
                       <0x0 0x12 0 IRQ_TYPE_EDGE_BOTH>,
                       <0x0 0x13 2 IRQ_TYPE_EDGE_BOTH>,
                       <0x0 0x13 1 IRQ_TYPE_EDGE_BOTH>,
                       <0x0 0x14 1 IRQ_TYPE_EDGE_BOTH>;
       interrupt-names = "chg-done",
                       "chg-fast",
                       "chg-trkl",
                       "bat-temp-ok",
                       "bat-present",
                       "chg-gone",
                       "usb-valid",
                       "dc-valid";

       qcom,fast-charge-current-limit = <1000000>;
       qcom,dc-charge-current-limit = <1000000>;
       usb_otg_in-supply = <&pm8941_5vs1>;

       otg-vbus {};
};