[PATCH] [UNTESTED] u-boot: Use better NAND timings

Harald Welte laforge at openmoko.org
Fri Oct 24 18:17:24 CEST 2008


On Fri, Oct 24, 2008 at 04:12:01PM +0200, Jonas Bonn wrote:
> +/* at 133MHz HCLK, this is 0ns, 30ns and 30ns */
> +#define GTA02_NAND_TACLS	0
> +#define GTA02_NAND_TWRPH0	4
> +#define GTA02_NAND_TWRPH1	4
> +
> 
> I think you mean GTA01 here...

thanks, fixed in my tree.

> Furthermore, TACLS=0 is not valid on the S3C2410; minimum value is 1.
> From my reading of the NAND-spec, the best we can do is
> 10ns,25ns,10ns, which is 2,4,2 (and gives 15ns,30ns,15ns at 133MHz).
> Feel free to refute this, though, if you have a better reading.

mh. I think I read it i a way that gets quite different timings, but really
don't have the time for any further work on this, sorry.

-- 
- Harald Welte <laforge at openmoko.org>          	        http://openmoko.org/
============================================================================
Software for the world's first truly open Free Software mobile phone



More information about the openmoko-kernel mailing list