linux-kernel - Re: [PATCH RFC 2/3] i2c-nomadik: turn the platform driver to an amba driver

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Date:	Thu, 31 May 2012 09:37:51 +0100
From:	Ben Dooks <ben.dooks@...ethink.co.uk>
To:	Linus Walleij <linus.walleij@...aro.org>
CC:	Alessandro Rubini <rubini@...dd.com>,
	Lee Jones <lee.jones@...aro.org>,
	Giancarlo Asnaghi <giancarlo.asnaghi@...com>,
	Russell King <linux@....linux.org.uk>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Srinidhi Kasagar <srinidhi.kasagar@...ricsson.com>,
	linux-kernel@...r.kernel.org, Wolfram Sang <w.sang@...gutronix.de>,
	Jean Delvare <khali@...ux-fr.org>, linux-i2c@...r.kernel.org,
	STEricsson_nomadik_linux@...t.st.com,
	linux-arm-kernel@...ts.infradead.org,
	Alan Cox <alan@...ux.intel.com>
Subject: Re: [PATCH RFC 2/3] i2c-nomadik: turn the platform driver to an amba
 driver

On 31/05/12 02:51, Linus Walleij wrote:
> On Thu, May 31, 2012 at 1:45 AM, Alessandro Rubini<rubini@...dd.com>  wrote:
>
>> The i2c-nomadik gateware is really a PrimeCell APB device. By hosting
>> the driver under the amba bus we can access it more easily, for
>> example using the generic pci-amba driver. The patch also fixes the
>> mach-ux500 users to register an AMBA device, not a platform device.
>>
>> Signed-off-by: Alessandro Rubini<rubini@...dd.com>
>> Acked-by: Giancarlo Asnaghi<giancarlo.asnaghi@...com>
>> Cc: Srinidhi Kasagar<srinidhi.kasagar@...ricsson.com>
>> Cc: STEricsson_nomadik_linux@...t.st.com
>> Cc: Linus Walleij<linus.walleij@...ricsson.com>
>
> This will affect Lee Jones' device tree bindings for the same device.
>
> You will need some add-on patch to the db8500 device tree moving this
> over to the AMBA (PrimeCell) bus abstraction.

What does AMBA win us over the platform device here?

-- 
Ben Dooks				http://www.codethink.co.uk/
Senior Engineer				Codethink - Providing Genius
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