Re: [PATCH] rest of works for migration to GENERIC_TIME

[Sergei Shtylyov <sshtylyov@ru.mvista.com>]

Hello, I wrote:

> Atsushi Nemoto wrote:

>>>    The whole idea of using such timer as TX39 has for both
>>> generating the interrupts and as a clocksource was wrong, I'm
>>> afraid.  You only can use a something similar to the MIPS counter
>>> which doesn't ever get auto-reloaded for both purposes at once.

>> Sure, we can do this improvement and it would be a right direction.
>> But for now I just want to get previous facility back again.  And
>> anyway I think someone who still have interest on this platform should
>> make it buildable and bootable before further improvement ;-)

>    Frankly, I'm sowewhat doubtful about TX39 timer code being sane at 
> all since it doesn't clear the timer interrupt -- it clearly should 
> override mips_timer_ack() and it doesn't! OTOH, it was working in 2.4 
> without this somehow... I'm puzzled since with the interrupt not being 
> cleared anywhere jmr3927_do_gettimeoffset() should be returning complete 
> crap once the frist interupt happens, i.e. only be jiffy-precise. Why it 
> doesn't get the interrupt flood I don't know or contrarywise, no further 
> interrupts after the first one, I don't know... :-/

    Ah, they put it into jmp3927_irq_ack(). Crap! :-/

>> ---
>> Atsushi Nemoto

WBR, Sergei