linux-kernel - Re: [Device-mainlining] [PATCH v2 2/3] gadget: Introduce the usb charger framework

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Date:	Thu, 8 Oct 2015 12:23:16 -0400
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Pavel Machek <pavel@....cz>
Cc:	Tim Bird <tim.bird@...ymobile.com>,
	Baolin Wang <baolin.wang@...aro.org>,
	"patches@...nsource.wolfsonmicro.com" 
	<patches@...nsource.wolfsonmicro.com>,
	"sameo@...ux.intel.com" <sameo@...ux.intel.com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"r.baldyga@...sung.com" <r.baldyga@...sung.com>,
	"sojka@...ica.cz" <sojka@...ica.cz>, Felipe Balbi <balbi@...com>,
	LKML <linux-kernel@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Peter Chen <peter.chen@...escale.com>,
	"sre@...nel.org" <sre@...nel.org>,
	Lee Jones <lee.jones@...aro.org>,
	"device-mainlining@...ts.linuxfoundation.org" 
	<device-mainlining@...ts.linuxfoundation.org>,
	"yoshihiro.shimoda.uh@...esas.com" <yoshihiro.shimoda.uh@...esas.com>
Subject: Re: [Device-mainlining] [PATCH v2 2/3] gadget: Introduce the usb
 charger framework

On Thu, Oct 08, 2015 at 05:50:31PM +0200, Pavel Machek wrote:
> Hi!
> 
> > On 08/16/2015 08:03 PM, Baolin Wang via device-mainlining wrote:
> > > On 14 August 2015 at 23:27, Greg KH <gregkh@...uxfoundation.org> wrote:
> > >> On Fri, Aug 14, 2015 at 05:47:45PM +0800, Baolin Wang wrote:
> > >>> + *
> > >>> + * This program is free software; you can redistribute it and/or modify
> > >>> + * it under the terms of the GNU General Public License as published by
> > >>> + * the Free Software Foundation; either version 2 of the License, or
> > >>> + * (at your option) any later version.
> > >>
> > >> I have to ask, do you really mean "any later version"?
> > >>
> > > 
> > > I think I did not get your point, could you explain it detailedly?
> > 
> > The full kernel is licensed under v2 of the GPL only, not "any later version".
> > See the second paragraph at the top of the COPYING file in the root directory
> > of the kernel source tree. There are differences on individual files, but
> > having this file allow "any later version" makes it different from much of
> > rest of the kernel.
> > 
> > Unless you have a specific reason to allow greater-than-V2 GPL licensing on this
> > file, you should change the licensing clause.  The following wording appears
> > to be pretty popular:
> > 
> > * This program is free software; you can redistribute it and/or modify
> > * it under the terms of the GNU General Public License version 2 as
> > * published by the Free Software Foundation.
> 
> Please, keep it V2 or later, if you can. It makes sharing code with U-Boot (for
> example) easier.
> 
> There's long tradition of "V2 or later" code in the kernel.

And there's even longer "v2 only" tradition as well.  It's up to the
person / company submitting the code to pick the license for it, let
them make the decision please.

thanks,

greg k-h
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