On Thu, 3 May 2012 22:13:23 +0200
Olof Johansson [off-list ref] wrote:

Hi,

On Thu, May 3, 2012 at 11:39 AM, Stephen Warren [off-list ref] wrote:

quoted

On 05/03/2012 10:51 AM, Hiroshi DOYU wrote:

quoted

Tegra Memory Controller(MC) driver for Tegra20/30.
Added to support MC General interrupts, mainly for IOMMU.

quoted

The location of a file may not be suitable because of xxx_driver under arch/arm/mach-*.
---

diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile

Russell, Olof, Arnd,

Where should this driver be placed? It's a completely Tegra-specific
module, and I don't believe there's any drivers/ directory or other
subsystem that's appropriate to house it right now. Should we go ahead
and create a drivers/arm/ for this? Perhaps drivers/misc/?

TI just added their memory driver in drivers/memory, and it was merged
through Greg K-H's driver tree. That would be a good location for this
one as well.

quoted

Honestly, to me it seems best to keep purely platform-specific drivers
like this in arch/arm/mach-tegra, since that's the most closely
Tegra-related directory.

Since tegra has a custom memory controller it's not as obvious that it
needs to go in a shared location, indeed. But it's easier to use the
same practices across platforms, and if there are other vendors that
end up sharing IP blocks for memory down the road, having them in a
common location makes sense.

I think that the above TI's patch is:

  Add TI EMIF SDRAM controller driver
    http://lwn.net/Articles/494922/

I'm moving this Tegra MC driver under drivers/memory, "tegra{20,30}-mc.c".