On 23/05/14 17:14, Arnd Bergmann wrote:

On Friday 23 May 2014 17:10:35 Tomi Valkeinen wrote:

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On 23/05/14 16:13, Alexander Shiyan wrote:

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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