# Re: 8xx spi completion sometime doesn't generate an interrupt

- List: linuxppc-dev
- 1 message, 1 author
- Page: https://ratatoskr.run/linuxppc-dev/2006/06/9407237/t

## Re: 8xx spi completion sometime doesn't generate an interrupt

- From: Wolfgang Denk \<hidden\>
- Date: 2006-06-03 00:51:13 
- Message: https://ratatoskr.run/linuxppc-dev/2006/06/9407237.md

```text
In message [ref] you wrote:
>
> I lowered the SPI bus frequency, the interrupt is now always happening but I 
> have always problems.

Try reducing the CPM load. If you have a serial  console  on  a  SMC,
shut it off, etc. Then try again (usually it will be better).

> have to double check the writing procedure. But it is also worth to note that 
> changing the PM (prescaler module) and lowering the SPI clock even more the 
> writing problem is happening less frequently. 

Yeah. At a SPI clock of 0 no errors will happen. The problem is, that
this is not too much useful either ;-)

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
Contrary to popular belief, thinking does not cause brain damage.
```