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    Subject[PATCH v7 0/4] Introduce usb charger framework to deal with the usb gadget power negotation
    Date
    Currently the Linux kernel does not provide any standard integration of this
    feature that integrates the USB subsystem with the system power regulation
    provided by PMICs meaning that either vendors must add this in their kernels
    or USB gadget devices based on Linux (such as mobile phones) may not behave
    as they should. Thus provide a standard framework for doing this in kernel.

    Now introduce one user with wm831x_power to support and test the usb charger,
    which is pending testing. Moreover there may be other potential users will use
    it in future.

    Changes since v5:
    - Remove the notifier chain things from the gadget and introduce one callback
    function to report to the usb charger when the gadget state is changed.
    - Flesh out the port type detection which combines the USB negotiation and
    PMICs detection.
    - Supply the notification mechanism to userspace when charger state is changed.
    - Integrate with the vbus staff in the gadget API.
    - Spilt up the functionality for userspace with one file per USB charger type.
    - Rebase on "4.4-rc7".

    Baolin Wang (4):
    gadget: Introduce the usb charger framework
    gadget: Support for the usb charger framework
    gadget: Integrate with the usb gadget supporting for usb charger
    power: wm831x_power: Support USB charger current limit management

    drivers/power/wm831x_power.c | 69 ++++
    drivers/usb/gadget/Kconfig | 7 +
    drivers/usb/gadget/Makefile | 1 +
    drivers/usb/gadget/charger.c | 708 +++++++++++++++++++++++++++++++++++++
    drivers/usb/gadget/udc/udc-core.c | 11 +
    include/linux/mfd/wm831x/pdata.h | 3 +
    include/linux/usb/gadget.h | 11 +
    include/linux/usb/usb_charger.h | 164 +++++++++
    8 files changed, 974 insertions(+)
    create mode 100644 drivers/usb/gadget/charger.c
    create mode 100644 include/linux/usb/usb_charger.h

    --
    1.7.9.5



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