linux-kernel - Re: [PATCH 0/2] Introduce usb charger framework to deal with the usb gadget power negotation

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Message-ID: <20150807175210.GC10003@kroah.com>
Date:	Fri, 7 Aug 2015 10:52:10 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Baolin Wang <baolin.wang@...aro.org>
Cc:	Peter Chen <peter.chen@...escale.com>, Felipe Balbi <balbi@...com>,
	Mark Brown <broonie@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>, sojka@...ica.cz,
	Alan Stern <stern@...land.harvard.edu>, andreas@...sler.com,
	linux-usb@...r.kernel.org,
	device-mainlining@...ts.linuxfoundation.org
Subject: Re: [PATCH 0/2] Introduce usb charger framework to deal with the usb
 gadget power negotation

On Fri, Aug 07, 2015 at 04:19:40PM +0800, Baolin Wang wrote:
> On 7 August 2015 at 13:34, Peter Chen <peter.chen@...escale.com> wrote:
> > On Thu, Aug 06, 2015 at 03:03:47PM +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.
> >>
> >> Providing a standard framework for doing this in the kernel.
> >
> > Baolin, thanks for introducing a framework for doing it, we do support
> > USB Charger for chipidea driver at internal tree, but it is specific
> > for imx, and still have some problems to upstream due to need to
> > change some common code.
> >
> > One suggestion, would you add your user next time? In that case, we can
> > know better for this framework.
> >
> 
> Peter, Thanks for your reviewing and comments. Now I just introduce
> the framework to review for more feedbacks and do not have a useful
> user to use it. I just can show you some example code to show how to
> use it. Thanks.

Without a real, in-tree user, I can not accept this code.  We don't add
"frameworks" for non-existant things, otherwise it will be instantly
ripped out the next kernel release.

Please come up with at least 2 users, ideally 3, otherwise there's no
real way to know if the framework is sufficient.

thanks,

greg k-h
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