On 29 March 2016 at 16:45, Jun Li <[email protected]> wrote: > > >> -----Original Message----- >> From: [email protected] [mailto:linux-usb- >> [email protected]] On Behalf Of Baolin Wang >> Sent: Monday, March 28, 2016 2:52 PM >> To: Peter Chen <[email protected]> >> Cc: Felipe Balbi <[email protected]>; Greg KH <[email protected]>; >> Sebastian Reichel <[email protected]>; Dmitry Eremin-Solenikov >> <[email protected]>; David Woodhouse <[email protected]>; Peter Chen >> <[email protected]>; Alan Stern <[email protected]>; >> [email protected]; Yoshihiro Shimoda >> <[email protected]>; Lee Jones <[email protected]>; Mark >> Brown <[email protected]>; Charles Keepax >> <[email protected]>; [email protected]; >> Linux PM list <[email protected]>; USB <[email protected]>; >> [email protected]; LKML <linux- >> [email protected]> >> Subject: Re: [PATCH v8 0/4] Introduce usb charger framework to deal with >> the usb gadget power negotation >> >> On 25 March 2016 at 15:09, Peter Chen <[email protected]> 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. >> > > Seems you don't want to guarantee charger type detection is done before > gadget connection(pullup DP), right? > I see you call usb_charger_detect_type() in each gadget usb state changes.
I am not sure I get your point correctly, please correct me if I misunderstand you. We need to check the charger type at every event comes from the usb gadget state changes or the extcon device state changes, which means a new charger plugin or pullup. > > Li Jun >> > >> > -- >> > Best Regards, >> > Peter Chen >> >> >> >> -- >> Baolin.wang >> Best Regards >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-usb" in >> the body of a message to [email protected] More majordomo info at >> http://vger.kernel.org/majordomo-info.html -- Baolin.wang Best Regards
