Hi, Baolin Wang <baolin.wang@xxxxxxxxxx> writes: > This patch introduces the usb charger driver based on usb gadget that > makes an enhancement to a power driver. It works well in practice but > that requires a system with suitable hardware. > > The basic conception of the usb charger is that, when one usb charger > is added or removed by reporting from the usb gadget state change or > the extcon device state change, the usb charger will report to power > user to set the current limitation. > > The usb charger will register notifiees on the usb gadget or the extcon > device to get notified the usb charger state. It also supplies the > notification mechanism to userspace When the usb charger state is changed. > > Power user will register a notifiee on the usb charger to get notified > by status changes from the usb charger. It will report to power user > to set the current limitation when detecting the usb charger is added > or removed from extcon device state or usb gadget state. > > This patch doesn't yet integrate with the gadget code, so some functions > which rely on the 'gadget' are not completed, that will be implemented > in the following patches. > > Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxx> > Reviewed-by: Li Jun <jun.li@xxxxxxx> > Tested-by: Li Jun <jun.li@xxxxxxx> > --- > drivers/usb/gadget/Kconfig | 7 + > drivers/usb/gadget/udc/Makefile | 1 + > drivers/usb/gadget/udc/charger.c | 770 ++++++++++++++++++++++++++++++++++++++ > include/linux/usb/charger.h | 191 ++++++++++ > include/uapi/linux/usb/charger.h | 31 ++ > 5 files changed, 1000 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 > > diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig > index 2057add..89f4e9b 100644 > --- a/drivers/usb/gadget/Kconfig > +++ b/drivers/usb/gadget/Kconfig > @@ -134,6 +134,13 @@ config U_SERIAL_CONSOLE > help > It supports the serial gadget can be used as a console. > > +config USB_CHARGER > + bool "USB charger support" you didn't build test all possibilities, did you? I have a feeling this won't link if USB_GADGET=m. Can you test that? > diff --git a/drivers/usb/gadget/udc/charger.c b/drivers/usb/gadget/udc/charger.c [...] > +struct class *usb_charger_class; We already have a UDC class, do we really, really need another class here? > +subsys_initcall(usb_charger_class_init); this should always work as module_init(). Please make sure that's the case. -- balbi
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