Re: [PATCH v2 1/3] video: clps711x: Add new Cirrus Logic CLPS711X framebuffer driver

[Tomi Valkeinen <tomi.valkeinen@ti.com>]

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On 23/05/14 17:14, Arnd Bergmann wrote:
> On Friday 23 May 2014 17:10:35 Tomi Valkeinen wrote:
>> On 23/05/14 16:13, Alexander Shiyan wrote:
>>
>>>> Would it be possible to add the new driver along the old driver, and use
>>>> the new driver only for the boards you have, and for boards for which
>>>> it's clear the the old driver is not working? This could be merged for 3.16.
>>>
>>> At this time yes, we can. But since I plan to add multiplatform support
>>> for this SOC, this seems not possible.
>>> I can try to make multiplatform support optional, then it could be done...
>>
>> Hmm, why is that not possible with multiplatform support? What do you
>> mean with multiplatform support here?
> 
> We are migrating all ARM platforms to allow building them into a single
> kernel. However, that means that device drivers cannot access platform
> specific header files any more and have to get hardware information from
> DT or through platform data. The existing driver however uses mach/hardware.h.

Ah, I see. So the problem is not with two different drivers for the same
hardware device as such, but that in this case the older driver just
doesn't play well with multiplatform.

 Tomi



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