On 01.10.2014 21:04, Jagan Teki wrote:
This is needed for the SoCFPGA booting from SPI NOR flash e.g. (N25Q256A). With these changes, the SoCrates can boot and re-boot (reset) from SPI NOR flash without any problems.
Seems like your SPI NOR reset logic is buggy. Does any of [1] apply to your board please?
[1] http://www.rocketboards.org/foswiki/Documentation/SocBoardQspiBoot
Yes. This seems to be that case. But I can't change it right now. So this "solution" with the soft-reset is better than nothing.
If this is some think that must require, any possibility to this resetting prior to u-boot? like preloader or in first stage boot loader or something.
Perhaps I was not clear with the intention of this patch. Its more to show how the problem with SPI flash on this platform / board (SoCrates in this case) can be solved. So that others have a reference. Thats why I marked it as RFC. Its not really meant for inclusion into mainline.
The real solution is a board rework. If not possible, the preloader should be changed. As I don't have access to the preloader code right now, this "solution" (I know, its more a hack) didn't seem too bad.
I feel this is mostly a kind of hardware treat, and looks like it's touching generic sf framework which is not so good.
Full ack on this. So please don't pull in into mainline.
Thanks, Stefan