linux-kernel - Re: [PATCH v3 01/12] misc: add driver for sequencer serial port

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Message-ID: <4CC1E00A.3010109@ti.com>
Date:	Fri, 22 Oct 2010 15:03:38 -0400
From:	Cyril Chemparathy <cyril@...com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	"davinci-linux-open-source@...ux.davincidsp.com" 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	"spi-devel-general@...ts.sourceforge.net" 
	<spi-devel-general@...ts.sourceforge.net>,
	"broonie@...nsource.wolfsonmicro.com" 
	<broonie@...nsource.wolfsonmicro.com>,
	"lrg@...mlogic.co.uk" <lrg@...mlogic.co.uk>,
	"dbrownell@...rs.sourceforge.net" <dbrownell@...rs.sourceforge.net>,
	"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"rpurdie@...ys.net" <rpurdie@...ys.net>, sameo@...ux.intel.com
Subject: Re: [PATCH v3 01/12] misc: add driver for sequencer serial port

On 10/22/2010 10:20 AM, Alan Cox wrote:
> On Thu, 21 Oct 2010 17:01:02 -0400
> Cyril Chemparathy <cyril@...com> wrote:
> 
>> TI's sequencer serial port (TI-SSP) is a jack-of-all-trades type of serial port
>> device.  It has a built-in programmable execution engine that can be programmed
>> to operate as almost any serial bus (I2C, SPI, EasyScale, and others).
>>
>> This patch adds a driver for this controller device.  The driver does not
>> expose a user-land interface.  Protocol drivers built on top of this layer are
>> expected to remain in-kernel.
> 
> I suspect the driver belongs with the mfd drivers not with drivers/misc ?
> 
> otherwise it looks very nice.

Unlike MFDs, this device doesn't have cells with differing
functionality.  Instead it has functionally identical ports that can
operate in a variety of modes.  That said, does this still fit in with
other MFD drivers?  If so, I don't see a problem with moving it there.

Thanks
Cyril.
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