[PATCH v4 08/11] tty: add pruss SUART driver

[subhasish@mistralsolutions.com (Subhasish Ghosh)]

>> 
>> Say, if the driver is loaded as a module.
>> If I allocate the sram in the platform code, how to I
>> free it when the driver is unloaded. 
> 
> This is what I said in my last e-mail. What is
> the issue you see with this approach?
> 
> | Thanks for the clarification. In this case, the driver
> | should use platform callbacks to get/put fast fifo
> | space. In case this callback is not populated by the
> | platform or returns an error, the driver should fall
> | back to allocating from DDR.
> 

ok, so what you are suggesting is that I implement some
callbacks (like .fifo_alloc, .fifo_dealloc) which can allocate
memory using sram_alloc.
My doubt is, if already such API's are there (by Russel) or you
are suggesting to implement them.