Re: DT GPMC SRAM and NOR flash support ?

[Jon Hunter <jon-hunter@ti.com>]

On 02/05/2013 10:16 AM, Mark Jackson wrote:
> On 01/02/13 19:39, Mark Jackson wrote:
>> On 01/02/13 17:12, Jon Hunter wrote:
>>> Hi Mark,
>>>
>>> On 02/01/2013 10:56 AM, Mark Jackson wrote:
>>>> There's plenty of DT support going in for NAND flash, but is there any work going on to support NOR
>>>> flash ?
>>>
>>> What board and device are you working that is using NOR? I have a
>>> OMAP2420 H4 with NOR that I have been doing a bit of maintenance for but
>>> I don't spend much time on it. Eventually it will have to be done but it
>>> is always good to know if there is a pressing need.
>>
>> We have a custom AM335x CPU board (arriving on my desk within the next few weeks) that has both NAND
>> and NOR Flash.
>>
>>>> And how about SRAM chips or other memory mapped devices ?
>>>
>>> Not sure about SRAM (trying to think if I have a board with SRAM even),
>>> but definitely, boards using the GPMC to interface to ethernet chips
>>> need to be added.
>>
>> The board also contains an FRAM chip (which is just treated as SRAM).
>>
>> If you'd anything in the pipeline, I'm glad to help in any testing. I've created a custom cape board
>> for the BeagleBone which contains the NOR flash and FRAM chips, so I'm not waiting for the new
>> hardware to arrive.

Sorry for the delay. I personally don't have anything in the pipe.

Afzal, do you know of anyone looking at this?

> I've experimented with trying to add a mtd-physmap device, but no joy.
> 
> I'm guessing that the current mtd-physmap code is (in some way) currently incompatible with the GPMC
> device ?

I am not familiar with mtd-physmap to comment. Is that DT specific?

Cheers
Jon