[U-Boot-Users] [PATCH] cfi_flash.c patches

[Brian Waite]

On Wednesday 24 August 2005 7:12 pm, Wolfgang Denk wrote:
> Dear Tolunay,
>
> in message <430CEC01.1070800 at orkun.us> you wrote:
> > > I think Wolfgang votes against this as he expects u-boot to provide
> > > him with a common view over many boards - thus seeing the hardware
> > > protection by default rather as a design decision to be abstracted by
> > > u-boot.
> >
> > But, he is making an assumption on the usage of portions of flash which
> > is not defined by U-Boot.
>
> I am not. As I wrote before I am aware that specific requirements may
> exist, and that these shallbe handled where they belong  to:  in  the
> board specific sections of the code.
>
Ok I surrender the point that common code shall unprotect all FLASH at boot. 
Can I ask you to consider a method of allowing the board maintainers to 
easily override this feature, either through a conditional compile or through 
a function pointer to be overridden by the board maintainer if desired? Here 
is my issue, I have been porting ppcboot and u-boot to boards for nearly 4 
years now. In all this time I have happend to have used Inelstrata FLASH with 
hardware protection, the protection was deigned into the product. That said, 
to forward port these boards to newer version of u-boot I will have to either 
patch common code, or copy cfi_flash.c to my board directoy remove the 
unprotect in flash_init() and maintain the copy on common code in each board 
set. This does not seem to make for the most modular design of u-boot. Can we 
have a hook such as initflash() that will by default call the common 
flash_init() if not overridden by the board. At least then I only have to 
maintain a copy of a single function.