linux-kernel - Re: [PATCH 1/3] of: Add prefix parameter to of_modalias

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Date:	Tue, 22 May 2012 17:01:51 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	David Daney <ddaney.cavm@...il.com>
Cc:	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	Rob Herring <rob.herring@...xeda.com>,
	"spi-devel-general@...ts.sourceforge.net" 
	<spi-devel-general@...ts.sourceforge.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	Liam Girdwood <lrg@...com>,
	Tabi Timur-B04825 <B04825@...escale.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH 1/3] of: Add prefix parameter to of_modalias_node().

Cool, thanks.

g.

On Tue, May 22, 2012 at 4:49 PM, David Daney <ddaney.cavm@...il.com> wrote:
> On 05/22/2012 01:09 PM, Grant Likely wrote:
>>
>> On Tue, May 22, 2012 at 1:45 PM, David Daney<ddaney.cavm@...il.com>
>>  wrote:
>>>
>>> On 05/19/2012 11:08 PM, Grant Likely wrote:
>>>>
>>>>
>>>> On Sat, 19 May 2012 23:54:36 -0600, Grant
>>>> Likely<grant.likely@...retlab.ca>    wrote:
>>>>>
>>>>>
>>>>> On Fri, 11 May 2012 15:05:21 -0700, David Daney<ddaney.cavm@...il.com>
>>>>>  wrote:
>>>>>>
>>>>>>
>>>>>> From: David Daney<david.daney@...ium.com>
>>>>>>
>>>>>> When generating MODALIASes, it is convenient to add things like "spi:"
>>>>>> or "i2c:" to the front of the strings.  This allows the standard
>>>>>> modprobe to find the right driver when automatically populating bus
>>>>>> children from the device tree structure.
>>>>>>
>>>>>> Add a prefix parameter, and adjust callers.  For
>>>>>> of_register_spi_devices() use the "spi:" prefix.
>>>>>>
>>>>>> Signed-off-by: David Daney<david.daney@...ium.com>
>>>>>
>>>>>
>>>>>
>>>>> Applied, thanks.  Some notes below...
>>>>
>>>>
>>>>
>>>> Wait... why is this necessary?
>>>
>>>
>>>
>>> Because in of_register_spi_devices() in of_spi.c, you do:
>>>
>>>        request_module(spi->modalias);
>>>
>>> The string passed to request_module() must have the "spi:" prefix.
>>
>>
>> How about modifying the call to request_module() to include the prefix
>> also?  I think that would be a simpler change overall.  Would that
>> work?
>
>
> It seems to.  I just sent such a patch in a new thread.
>
> David Daney



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
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