linux-kernel - Re: [PATCHv5 2/2] mailbox: Adding driver for Xilinx LogiCORE IP mailbox.

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Date:	Thu, 25 Jun 2015 09:31:31 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	Michal Simek <michal.simek@...inx.com>,
	Moritz Fischer <moritz.fischer@...us.com>,
	jassisinghbrar@...il.com
Cc:	linux-kernel@...r.kernel.org, robh+dt@...nel.org,
	pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	soren.brinkmann@...inx.com, akpm@...ux-foundation.org,
	gregkh@...uxfoundation.org, mchehab@....samsung.com, arnd@...db.de,
	joe@...ches.com, jingoohan1@...il.com, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCHv5 2/2] mailbox: Adding driver for Xilinx LogiCORE IP
 mailbox.

On Thu, 2015-06-25 at 08:55 +0200, Michal Simek wrote:
> On 06/24/2015 10:36 PM, Paul Bolle wrote:
> > On Tue, 2015-06-23 at 11:00 -0700, Moritz Fischer wrote:
> > > +MODULE_ALIAS("platform:xilinx-mailbox");
> > 
> > So I think this MODULE_ALIAS() is only useful if, in short, there's 
> > a corresponding platform_device created. Ie, a platform_device with 
> > a name "xilinx-mailbox" that will fire of a "MODALIAS=platform:xili
> > nx-mailbox" when it's created.
> > 
> > I couldn't spot such a platform_device. Provided git grep didn't 
> > let me down here: what breaks if this line is dropped?
> 
> IRC you don't need to have this platform_device in the kernel 
> present. Only one thing which should be check is that this driver can 
> be used as platform device driver.
> 
> The only one problematic part is devm_clk_get() and this should be
> checked if you can use this as platform driver. From the first look 
> it looks like that this will break it.
> 
> Anyway if Moritz is able to use this a platform driver he can keep 
> this line there. If not, it should be removed.

But, assuming this works as a platform driver, where does the "xilinx
-mailbox" platform device originate?


Paul Bolle

PS Evolution 3.16 is nearly unbearable in its handling of replies to
plain text messages. Doe anyone know how to make it handle them
sensibly?
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