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

From	Peter Chen <peter.chen@nxp.com>
Newsgroups	linux.kernel
Subject	RE: [PATCH v8 0/4] Introduce usb charger framework to deal with the usb gadget power negotation
Date	2016-03-29 02:50 +0200
Message-ID	<rhQ14-6Cl-9@gated-at.bofh.it> (permalink)
References	<rgcIq-2Eo-5@gated-at.bofh.it> <rguch-6J2-1@gated-at.bofh.it> <rhzjz-3dm-5@gated-at.bofh.it> <rhzCV-3AJ-3@gated-at.bofh.it> <rhBv3-4QJ-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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> 
> On 28 March 2016 at 15:13, Peter Chen <hzpeterchen@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 <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?
> 
> Users can choose to implement multiple ways to get the charger type In
> 'usb_charger_detect_type()' function.
> 
> >
 
Then, how you test your code? When we introduce an API, at least, there is one
user for it.

Peter

Thread

[PATCH v8 0/4] Introduce usb charger framework to deal with the usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-24 13:40 +0100
  [PATCH v8 2/4] gadget: Support for the usb charger framework Baolin Wang <baolin.wang@linaro.org> - 2016-03-24 13:40 +0100
  [PATCH v8 1/4] gadget: Introduce the usb charger framework Baolin Wang <baolin.wang@linaro.org> - 2016-03-24 13:40 +0100
  [PATCH v8 4/4] power: wm831x_power: Support USB charger current limit management Baolin Wang <baolin.wang@linaro.org> - 2016-03-24 13:40 +0100
    Re: [PATCH v8 4/4] power: wm831x_power: Support USB charger current  limit management Geert Uytterhoeven <geert@linux-m68k.org> - 2016-03-27 10:30 +0200
      Re: [PATCH v8 4/4] power: wm831x_power: Support USB charger current  limit management Baolin Wang <baolin.wang@linaro.org> - 2016-03-28 08:50 +0200
  [PATCH v8 3/4] gadget: Integrate with the usb gadget supporting for usb charger Baolin Wang <baolin.wang@linaro.org> - 2016-03-24 13:40 +0100
  Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Peter Chen <hzpeterchen@gmail.com> - 2016-03-25 08:20 +0100
    Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-28 09:00 +0200
      Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Peter Chen <hzpeterchen@gmail.com> - 2016-03-28 09:20 +0200
        Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-28 11:20 +0200
          RE: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Peter Chen <peter.chen@nxp.com> - 2016-03-29 02:50 +0200
            Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-29 04:10 +0200
              Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Mark Brown <broonie@kernel.org> - 2016-03-29 19:20 +0200
        Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Mark Brown <broonie@kernel.org> - 2016-03-29 19:30 +0200
          Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Peter Chen <hzpeterchen@gmail.com> - 2016-03-30 04:10 +0200
            Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-30 09:10 +0200
              Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Peter Chen <hzpeterchen@gmail.com> - 2016-03-30 09:50 +0200
                Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-30 10:50 +0200
                Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Peter Chen <hzpeterchen@gmail.com> - 2016-03-30 11:30 +0200
                Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-30 11:40 +0200
      RE: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Jun Li <jun.li@nxp.com> - 2016-03-29 11:20 +0200
        Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-29 11:50 +0200
          RE: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Jun Li <jun.li@nxp.com> - 2016-03-30 05:00 +0200
            Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-30 08:20 +0200
              RE: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Jun Li <jun.li@nxp.com> - 2016-03-30 10:50 +0200
                Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-30 11:40 +0200
                RE: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Jun Li <jun.li@nxp.com> - 2016-03-30 13:00 +0200
                RE: [PATCH v8 0/4] Introduce usb charger framework to deal with the usb gadget power negotation Felipe Balbi <balbi@kernel.org> - 2016-03-30 13:30 +0200
                Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-31 07:40 +0200
                Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the usb gadget power negotation Felipe Balbi <balbi@kernel.org> - 2016-03-31 08:30 +0200
                Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-31 08:40 +0200
                Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-31 07:30 +0200
                RE: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Jun Li <jun.li@nxp.com> - 2016-03-31 08:20 +0200
                Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-31 08:40 +0200
                Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the usb gadget power negotation Felipe Balbi <balbi@kernel.org> - 2016-03-31 10:20 +0200
                Re: [PATCH v8 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Baolin Wang <baolin.wang@linaro.org> - 2016-03-31 10:30 +0200

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