[U-Boot] [PATCH 0/2] CFI: increase performance

[Jens Gehrlein <sew_s@tqs.de>]

Hi Stefan,

Stefan Roese schrieb:
> On Tuesday 16 December 2008, Jens Gehrlein wrote:
>> The following patches should increase the performance of the CFI driver,
>> particularly with regard to single word programming mode.
>>
>> I tested it on TQM5200S with NOR-Flash Samsung K8P2815UQB, which has no
>> write buffer. At least no write buffer, that could be programmed using
>> standard commands.
>>
>> Performance increase on this TQM is about factor 2.6 (37 KiB/s -> 95
>> KiB/s). On the same module with Spansion S29GL128N (with write buffer) it
>> is about factor 1.2 (455 KiB/s -> 585 KiB/s).
>>
>> TQM5200 is a bottom boot module with 2x16 Bit Flash connection. Could
>> someone test the patches on other HW, particularly top boot, other CPU,
>> other flash width, please?
> 
> Tested on AMCC Kilauea (PPC405EX, with 1*16bit Spansion S29GL512N.

The S29GL512N has a write buffer, AFAIK. Thus, U-Boot chooses another
programming algorithm. Possibly, you only tested patch 2 or did you 
override buffered programming for your test so that patch 1 was
included?

> 
> Patch series applied to u-boot-cfi-flash/master. Thanks.

Nice, thanks.

Kind regards,
Jens