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

Peter Chen
2016-03-28T07:14:11Z

On Mon, Mar 28, 2016 at 02:51:40PM +0800, Baolin Wang wrote:
> On 25 March 2016 at 15:09, Peter Chen <hzpeterchen@gmail.com> wrote:
> > On Thu, Mar 24, 2016 at 08:35:53PM +0800, Baolin Wang wrote:
> >> 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.
> >>
> >
> > I am afraid I still not find the user (udc driver) for this framework, I would
> > like to see how udc driver block the enumeration until the charger detection
> > has finished, or am I missing something?
>
> It is not for udc driver but for power users who want to negotiate
> with USB subsystem.
>

Then, where is the code the test user to decide what kinds of USB charger
(SDP, CDP, DCP) is connecting now?

--
Best Regards,
Peter Chen