Re: PPC CPU speed detection [was: Re: amigappc test kernel for CSPPC and BPPC]

[RadosÅaw Kujawa <radoslaw.kujawa%c0ff33.net@localhost>]

On Dec 13, 2010, at 7:46 PM, Alan Hourihane wrote:

> On Mon, 2010-12-13 at 19:12 +0100, Radosław Kujawa wrote:
>> On Dec 13, 2010, at 1:58 PM, Frank Wille wrote:
>> 
>>> Those new values all match with the 604e PLLs, but some, like 0010 and 0101,
>>> are still wrong. So you are probably right that we could use the 604e PLL
>>> table for the 603e as well.
>>> 
>> 
>> Attached patch simplifies amigappc_identify() by merging PLL tables into 
>> one. I think that we can safely use values from 604e PLLs, as 603e's 0010 
>> and 0101 corresponds to high multipliers of 604e. Probability that 603e with 
>> these PLL_CFGs exist is quite low (and I've never seen 603e faster than 
>> 300MHz). Anyway, It works for me, 300MHz CPU is detected OK.
> 
> There are 603e's faster than 300MHz. People have been upgrading the
> BlizzardPPC to 330MHz, and CSPPC to 363MHz.

All these BlizzardPPCs I've seen were 300MHz clocked at 330MHz. In fact, my 
patch fixed detection for 330MHz boards too. I highly doubt that faster 603e 
chips were ever manufactured (and that's not the problem here). CSPPC is a 
completely different story, as there's 604e. PLL table for 604e was always 
fine. It should even work for a guy who upgraded his CSPPC with 466MHz 604e.
 
--
Best regards,
Radosław Kujawa