[PATCH v2] spi: orion.c: Add direct access mode

[Mark Brown]

On Tue, Mar 22, 2016 at 05:35:46PM +0100, Thomas Petazzoni wrote:

> Has there been any discussion on whether dynamically adding the MBus
> window is a good idea, as opposed to statically defining it in the
> board .dts ?

> So far, the only driver that was using dynamically allocated MBus is
> the PCIe controller driver, because there is no way in advanced to know
> the number and memory window requirements of the PCIe devices that will
> be connected to the system.

> For all other windows (BootROM, crypto SRAM and more recently network
> related SRAM), we are using statically allocated windows.

Is this a case where we used to use static assignment because we didn't
have a mechanism for dynamic assignment but now have a mechanism for
dynamic assignment?  In other words is there any advantage to doing the
assignments statically given that we can do them dynamically?
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