Messages in this thread | | | From | Jun Li <> | Subject | RE: [PATCH v8 0/4] Introduce usb charger framework to deal with the usb gadget power negotation | Date | Tue, 29 Mar 2016 08:45:43 +0000 |
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> -----Original Message----- > From: linux-usb-owner@vger.kernel.org [mailto:linux-usb- > owner@vger.kernel.org] On Behalf Of Baolin Wang > Sent: Monday, March 28, 2016 2:52 PM > To: Peter Chen <hzpeterchen@gmail.com> > Cc: Felipe Balbi <balbi@kernel.org>; Greg KH <gregkh@linuxfoundation.org>; > Sebastian Reichel <sre@kernel.org>; Dmitry Eremin-Solenikov > <dbaryshkov@gmail.com>; David Woodhouse <dwmw2@infradead.org>; Peter Chen > <peter.chen@freescale.com>; Alan Stern <stern@rowland.harvard.edu>; > r.baldyga@samsung.com; Yoshihiro Shimoda > <yoshihiro.shimoda.uh@renesas.com>; Lee Jones <lee.jones@linaro.org>; Mark > Brown <broonie@kernel.org>; Charles Keepax > <ckeepax@opensource.wolfsonmicro.com>; patches@opensource.wolfsonmicro.com; > Linux PM list <linux-pm@vger.kernel.org>; USB <linux-usb@vger.kernel.org>; > device-mainlining@lists.linuxfoundation.org; LKML <linux- > kernel@vger.kernel.org> > 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 <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. >
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.
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 majordomo@vger.kernel.org More majordomo info at > http://vger.kernel.org/majordomo-info.html
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