[U-Boot] What is CONFIG_HAS_DATAFLASH?

[Timur Tabi]

Wolfgang Denk wrote:

>> This doesn't tell me anything.
> 
> Hm... What exactly don't you understand here?

Well, I was just wondering what the connection is between DataFlash (which is some flash technology that I don't know much about) and the md command.  

> Why are plain simple memory accesses not possible on your hardware?
> Which architecture / CPU is this?

Because on this one chip I'm working on, the designers decided to mux the LBC address lines with the video signal from the on-board display driver.  No, I'm not kidding about that.  That means that when you're using the video display, you can't access flash.  CONFIG_CFI_FLASH_USE_WEAK_ACCESSORS will allow the saveenv command to continue working under this situation.

-- 
Timur Tabi
Linux kernel developer at Freescale