[PATCH v8 0/4] Introduce usb charger framework to deal with the usb gadget power negotation

Baolin Wang
2016-03-24T12:36:45Z

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 v7:
- Add documentations for sysfs attributes.

Other prominent improvements 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.

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 | 714 +++++++++++++++++++++++++++++++++++++
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, 980 insertions(+)
create mode 100644 drivers/usb/gadget/charger.c
create mode 100644 include/linux/usb/usb_charger.h

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1.7.9.5