[U-Boot] [PATCH] arm: dts: dra7: add qspi register map for control module

[Jean-Jacques Hiblot]

On 06/02/2017 13:47, Tom Rini wrote:
> On Mon, Feb 06, 2017 at 12:09:12PM +0100, Jean-Jacques Hiblot wrote:
>>
>> On 03/02/2017 17:52, Tom Rini wrote:
>>> On Wed, Feb 01, 2017 at 11:53:42AM +0100, Jean-Jacques Hiblot wrote:
>>>
>>>> Add qspi control module register maps to device tree. This register map had
>>>> been removed by error when syncing the DTS with the latest linux at the
>>>> time (commit 7aa1a4087 "ARM: dts: dra7xx: sync DT with latest Linux").
>>>> Without this entry the driver do not support memory-mapped access and the
>>>> data read from the SF is invalid.
>>>>
>>>> Signed-off-by: Jean-Jacques Hiblot <jjhiblot at ti.com>
>>> Why is this not in the upstream DTS file?
>> In Linux, a syscon/regmap is  used to map this register while the
>> QSPI driver in u-boot uses a direct memory access.
> OK, but it's a valid part of the upstream kernel binding, yes?
syscon-chipselects is part of the mainlined binding. Using a 3rd memory 
range used to be the way to do it, but it is not supported anymore (I 
think it has been removed removed in 4.6).
Using a third memory range has been supported in u-boot for some time now.
So you think we should move to using the syscon ?