[U-Boot] CONFIG_SYS_FLASH_USE_BUFFER_WRITE breaks writing with M29W640 parts

[U-Boot] CONFIG_SYS_FLASH_USE_BUFFER_WRITE breaks writing with M29W640 parts

[Mike Frysinger]

i started playing with the CONFIG_SYS_FLASH_USE_BUFFER_WRITE option, and it 
seems to work fine with an intel strataflash.  but when i tried using it with 
an ST M29W640 part, no writes are ever committed to the flash.

are there any known gotchas with this code before i start poking further ?
-mike
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[U-Boot] CONFIG_SYS_FLASH_USE_BUFFER_WRITE breaks writing with M29W640 parts

[Stefan Roese]

Hi Mike,

On Tuesday 07 June 2011 00:26:05 Mike Frysinger wrote:
> i started playing with the CONFIG_SYS_FLASH_USE_BUFFER_WRITE option, and it
> seems to work fine with an intel strataflash.  but when i tried using it
> with an ST M29W640 part, no writes are ever committed to the flash.
> 
> are there any known gotchas with this code before i start poking further ?

Not that I am aware of. I am using it on all my Intel/Numonyx and AMD/Spansion 
NOR flash equipped boards without any issues. I don't remember using it on a 
ST device though. Not sure what's going wrong there, sorry.

Best regards,
Stefan

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[U-Boot] CONFIG_SYS_FLASH_USE_BUFFER_WRITE breaks writing with M29W640 parts

[Graeme Russ]

On 07/06/11 18:22, Stefan Roese wrote:
> Hi Mike,
> 
> On Tuesday 07 June 2011 00:26:05 Mike Frysinger wrote:
>> i started playing with the CONFIG_SYS_FLASH_USE_BUFFER_WRITE option, and it
>> seems to work fine with an intel strataflash.  but when i tried using it
>> with an ST M29W640 part, no writes are ever committed to the flash.
>>
>> are there any known gotchas with this code before i start poking further ?
> 
> Not that I am aware of. I am using it on all my Intel/Numonyx and AMD/Spansion 
> NOR flash equipped boards without any issues. I don't remember using it on a 
> ST device though. Not sure what's going wrong there, sorry.
> 

I'm running a combination of Intel StrataFlash and AM29LV040B (equivalent
to ST29LV040B) and I cannot enable CONFIG_SYS_FLASH_USE_BUFFER_WRITE either
- I don't think the AM29 device supports it :(

Regards,

Graeme