On 28 March 2016 at 15:13, Peter Chen <hzpeterc...@gmail.com> wrote: > On Mon, Mar 28, 2016 at 02:51:40PM +0800, Baolin Wang wrote: >> On 25 March 2016 at 15:09, Peter Chen <hzpeterc...@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?
Users can choose to implement multiple ways to get the charger type In 'usb_charger_detect_type()' function. > > -- > Best Regards, > Peter Chen -- Baolin.wang Best Regards
