Date: Wed, 5 Feb 2014 11:19:28 -0500
From: Matt Porter <mporter@linaro.org>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Wolfram Sang <wsa@the-dreams.de>, Tim Kryger <tim.kryger@linaro.org>,
        Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        Kumar Gala <galak@codeaurora.org>,
        Samuel Ortiz <sameo@linux.intel.com>, Lee Jones <lee.jones@linaro.org>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@opensource.wolfsonmicro.com>,
        Christian Daudt <bcm@fixthebug.org>,
        Devicetree List <devicetree@vger.kernel.org>,
        Linux I2C List <linux-i2c@vger.kernel.org>,
        Linux ARM Kernel List <linux-arm-kernel@lists.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Felipe Balbi <balbi@ti.com>, linux-usb@vger.kernel.org
Subject: Re: [PATCH 1/6] i2c: bcm-kona: register with subsys_initcall
Message-ID: <20140205161928.GF22153@beef>
References: <20140205151826.GC22153@beef>
 <Pine.LNX.4.44L0.1402051028350.1312-100000@iolanthe.rowland.org>
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On Wed, Feb 05, 2014 at 10:30:29AM -0500, Alan Stern wrote:
> On Wed, 5 Feb 2014, Matt Porter wrote:
> 
> > On Wed, Feb 05, 2014 at 10:08:18AM +0100, Wolfram Sang wrote:
> > > On Tue, Feb 04, 2014 at 07:19:07AM -0500, Matt Porter wrote:
> > > 
> > > > Voltage regulators are needed very early due to deferred probe
> > > > being incompatible with built-in USB gadget drivers.
> > > 
> > > What does it need to fix those instead?
> > 
> > [added Alan/Felipe for more insight]
> > 
> > Discussion on that topic came about from this submission:
> > http://www.spinics.net/lists/linux-usb/msg94217.html
> > 
> > End of it is:
> > http://www.spinics.net/lists/linux-usb/msg94731.html
> > 
> > We can either add to the many drivers that already do subsys_initcall()
> > for similar reasons...or I can drop this from the series and add gadget
> > probe ordering to my TODO list.
> > 
> > In short, it can't be a late_initcall() hack like the original post and
> > really could be solved by converting to a real bus (and letting
> > deferred probe do its job)..but Alan voiced concerns about that.
> 
> Don't worry too much about what I said.  If adding a "gadget" bus will 
> solve the problem in an appropriate way, and if nobody else objects 
> (particularly Felipe, who is on vacation now), then go for it.

Ok, I'll take a look at what can be done and restart the conversation
when Felipe returns.

Wolfram: given this, as I mentioned, I'll simply drop this patch from
the series and work around it for now. This will probably make Lee and
Mark happy to not see subsys_initcall() in the MFD/regulator drivers as
well.

-Matt
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