[U-Boot] [PATCH] nios2: Set CONFIG_SYS_HZ to 1000 all nios2 boards.

[Thomas Chou]

On 03/31/2010 10:09 AM, Scott McNutt wrote:
>> So it might be cleaner to let user define the HZ as the actual tick rate
>> and increase the tick count by one in the tmr_isr.
>>      
> This was discussed/debated thoroughly over the past year:
> CONFIG_SYS_HZ at 1000 is mandatory.
>
>    
>> -    timestamp += CONFIG_SYS_NIOS_TMRMS;
>> +    timestamp++;
>>      
> This means that each interrupt is exactly 1 msec. That's not what
> was intended and not what was implemented Forcing the interrupt
> period to 1 msec is an unnecessary constraint. If you want the isr
> to increment the timestamp by 1, then set CONFIG_SYS_NIOS_TMRMS to 1
> ... and set your timer accordingly.
>
> -
>    
Hi Scott,

Thanks for the explanation. I will set HZ to 1000 and TMRMS to 1.

I tried to follow your patch "nios2: Set CONFIG_SYS_HZ to 1000 all nios2 
boards". But got cfi flash buffer write timeout on EP2C35 board. If I 
set TMRMS to 1, it works with HZ at 100, 1000 and 2000.

Best regards,
Thomas