File Manager

003 File Manager

Current Path: /usr/src/sys/contrib/device-tree/Bindings/power/supply

usr / src / sys / contrib / device-tree / Bindings / power / supply /

📁 ..
📁 ab8500
📄 act8945a-charger.txt(1.68 KB)
📄 axp20x_ac_power.txt(606 B)
📄 axp20x_battery.txt(530 B)
📄 axp20x_usb_power.txt(998 B)
📄 battery.txt(130 B)
📄 battery.yaml(4.79 KB)
📄 bq2415x.txt(1.38 KB)
📄 bq24190.txt(1.86 KB)
📄 bq24257.txt(2.18 KB)
📄 bq2515x.yaml(2.43 KB)
📄 bq25890.txt(2.02 KB)
📄 bq27xxx.yaml(2.3 KB)
📄 charger-manager.txt(2.3 KB)
📄 cpcap-battery.txt(1 KB)
📄 cpcap-charger.txt(1.34 KB)
📄 cw2015_battery.yaml(2.38 KB)
📄 da9150-charger.txt(680 B)
📄 da9150-fg.txt(681 B)
📄 gpio-charger.txt(760 B)
📄 gpio-charger.yaml(1.48 KB)
📄 ingenic,battery.txt(930 B)
📄 isp1704.txt(457 B)
📄 lego_ev3_battery.txt(719 B)
📄 lp8727_charger.txt(1.04 KB)
📄 lt3651-charger.txt(1.13 KB)
📄 ltc2941.txt(1.22 KB)
📄 max17040_battery.txt(1.04 KB)
📄 max17042_battery.txt(1.11 KB)
📄 max77650-charger.yaml(992 B)
📄 max8903-charger.txt(858 B)
📄 max8925_battery.txt(480 B)
📄 maxim,ds2760.txt(990 B)
📄 maxim,max14656.txt(472 B)
📄 microchip,ucs1002.txt(805 B)
📄 olpc_battery.txt(108 B)
📄 power-supply.yaml(937 B)
📄 power_supply.txt(88 B)
📄 qcom,coincell-charger.txt(1.14 KB)
📄 qcom_smbb.txt(5.71 KB)
📄 rohm,bd99954.yaml(5.96 KB)
📄 rt9455_charger.txt(1.72 KB)
📄 rx51-battery.txt(772 B)
📄 sbs,sbs-battery.yaml(2.04 KB)
📄 sbs,sbs-manager.txt(1.84 KB)
📄 sbs_sbs-charger.txt(595 B)
📄 sc2731_charger.txt(1.08 KB)
📄 sc27xx-fg.txt(1.96 KB)
📄 ti,bq24735.txt(1.8 KB)
📄 tps65090.txt(397 B)
📄 tps65217_charger.txt(450 B)
📄 twl-charger.txt(905 B)

Editing: rohm,bd99954.yaml

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/power/supply/rohm,bd99954.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: ROHM BD99954 Battery charger

maintainers:
  - Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
  - Markus Laine <markus.laine@fi.rohmeurope.com>
  - Mikko Mutanen <mikko.mutanen@fi.rohmeurope.com>

description: |
  The ROHM BD99954 is a Battery Management LSI for 1-4 cell Lithium-Ion
  secondary battery intended to be used in space-constraint equipment such
  as Low profile Notebook PC, Tablets and other applications. BD99954
  provides a Dual-source Battery Charger, two port BC1.2 detection and a
  Battery Monitor.

properties:
  compatible:
    const: rohm,bd99954
#
#    The battery charging profile of BD99954.
#
#    Curve (1) represents charging current.
#    Curve (2) represents battery voltage.
#
#    The BD99954 data sheet divides charging to three phases.
#    a) Trickle-charge with constant current (8).
#    b) pre-charge with constant current (6)
#    c) fast-charge with:
#       First a constant current (5) phase (CC)
#       Then constant voltage (CV) phase (after the battery voltage has reached
#       target level - until charging current has dropped to termination
#       level (7)
#
#     V ^                                                        ^ I
#       .                                                        .
#       .                                                        .
# (4)- -.- - - - - - - - - - - - - -  +++++++++++++++++++++++++++.
#       .                            /                           .
#       .                     ++++++/++ - - - - - - - - - - - - -.- - (5)
#       .                     +    /  +                          .
#       .                     +   -   --                         .
#       .                     +  -     +                         .
#       .                     +.-      -:                        .
#       .                    .+         +`                       .
#       .                  .- +       | `/                       .
#       .               .."   +          .:                      .
#       .             -"      +           --                     .
#       .    (2)  ..."        +       |    :-                    .
#       .    ...""            +             -:                   .
# (3)- -.-.""- - - - -+++++++++ - - - - - - -.:- - - - - - - - - .- - (6)
#       .             +                       `:.                .
#       .             +               |         -:               .
#       .             +                           -:             .
#       .             +                             ..           .
#       .   (1)       +               |               "+++- - - -.- - (7)
#       -++++++++++++++- - - - - - - - - - - - - - - - - + - - - .- - (8)
#       .                                                +       -
#       -------------------------------------------------+++++++++-->
#       |             |       |   CC   |      CV         |
#       | --trickle-- | -pre- | ---------fast----------- |
#
#   The charger uses the following battery properties
# - trickle-charge-current-microamp:
#     Current used at trickle-charge phase (8 in above chart)
#     minimum: 64000
#     maximum: 1024000
#     multipleOf: 64000
# - precharge-current-microamp:
#     Current used at pre-charge phase (6 in above chart)
#     minimum: 64000
#     maximum: 1024000
#     multipleOf: 64000
# - constant-charge-current-max-microamp
#     Current used at fast charge constant current phase (5 in above chart)
#     minimum: 64000
#     maximum: 1024000
#     multipleOf: 64000
# - constant-charge-voltage-max-microvolt
#     The constant voltage used in fast charging phase (4 in above chart)
#     minimum: 2560000
#     maximum: 19200000
#     multipleOf: 16000
# - precharge-upper-limit-microvolt
#     charging mode is changed from trickle charging to pre-charging
#     when battery voltage exceeds this limit voltage (3 in above chart)
#     minimum: 2048000
#     maximum: 19200000
#     multipleOf: 64000
# - re-charge-voltage-microvolt
#     minimum: 2560000
#     maximum: 19200000
#     multipleOf: 16000
#     re-charging is automatically started when battry has been discharging
#     to the point where the battery voltage drops below this limit
# - over-voltage-threshold-microvolt
#     battery is expected to be faulty if battery voltage exceeds this limit.
#     Charger will then enter to a "battery faulty" -state
#     minimum: 2560000
#     maximum: 19200000
#     multipleOf: 16000
# - charge-term-current-microamp
#     minimum: 0
#     maximum: 1024000
#     multipleOf: 64000
#     a charge cycle terminates when the battery voltage is above recharge
#     threshold, and the current is below this setting (7 in above chart)
#   See also Documentation/devicetree/bindings/power/supply/battery.txt

monitored-battery:
    description:
      phandle of battery characteristics devicetree node

rohm,vsys-regulation-microvolt:
    description: system specific lower limit for system voltage.
    minimum: 2560000
    maximum: 19200000
    multipleOf: 64000

rohm,vbus-input-current-limit-microamp:
    description: system specific VBUS input current limit (in microamps).
    minimum: 32000
    maximum: 16352000
    multipleOf: 32000

rohm,vcc-input-current-limit-microamp:
    description: system specific VCC/VACP input current limit (in microamps).
    minimum: 32000
    maximum: 16352000
    multipleOf: 32000

required:
  - compatible

examples:
  - |
    i2c {
        #address-cells = <1>;
        #size-cells = <0>;
        charger@9 {
            compatible = "rohm,bd99954";
            monitored-battery = <&battery>;
            reg = <0x9>;
            interrupt-parent = <&gpio1>;
            interrupts = <29 8>;
            rohm,vsys-regulation-microvolt = <8960000>;
            rohm,vbus-input-current-limit-microamp = <1472000>;
            rohm,vcc-input-current-limit-microamp = <1472000>;
        };
    };

003 File Manager

Editing: rohm,bd99954.yaml

Upload File

Create Folder