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 v8: - Remove the bus type things. - Introduce one charger_detect() callback to detect charger type if it is needed. - Add some sysfs attributes for showing the charger type and state. - Change the charger current attributes to read only. - Move charger state and type definition to include/uapi. - Some other optimiazations. 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/udc/Makefile | 1 + drivers/usb/gadget/udc/charger.c | 798 +++++++++++++++++++++++++++++++++++++ drivers/usb/gadget/udc/udc-core.c | 11 + include/linux/mfd/wm831x/pdata.h | 3 + include/linux/usb/charger.h | 171 ++++++++ include/linux/usb/gadget.h | 15 + include/uapi/linux/usb/charger.h | 31 ++ 9 files changed, 1106 insertions(+) create mode 100644 drivers/usb/gadget/udc/charger.c create mode 100644 include/linux/usb/charger.h create mode 100644 include/uapi/linux/usb/charger.h -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
