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Re: [PATCH][respin] pnx8550: fix system timer support

To: linux-mips@linux-mips.org
Subject: Re: [PATCH][respin] pnx8550: fix system timer support
From: Daniel Laird <danieljlaird@hotmail.com>
Date: Wed, 3 Jan 2007 06:34:13 -0800 (PST)
In-reply-to: <20070103.225713.74752439.anemo@mba.ocn.ne.jp>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <20061228171405.b1e3eed8.vitalywool@gmail.com> <20061229.011621.05599370.anemo@mba.ocn.ne.jp> <acd2a5930612280820l43639382x1f573386f2752d18@mail.gmail.com> <8124491.post@talk.nabble.com> <20070103.010650.25910215.anemo@mba.ocn.ne.jp> <8127168.post@talk.nabble.com> <20070103.225713.74752439.anemo@mba.ocn.ne.jp>
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Atsushi Nemoto wrote:
> 
> On Tue, 2 Jan 2007 09:17:32 -0800 (PST), Daniel Laird
> <danieljlaird@hotmail.com> wrote:
>> Thanks, thats the build problem removed, I now have a kernel that builds
>> properly! (issues 1 and 2 appear to be closed)
>> Only issue remaining is that I still have a long hang (10 seconds ish) 
>> after this
>> Memory: 53540k/57344k available (2156k kernel code, 3744k reserved, 383k
>> data, 128k init, 0k highmem)
>>  I am investigating but any help is appreciated...
> 
> Does this patch (on top of Vitaly's patch) solve remaining problem?
> 
> diff --git a/arch/mips/philips/pnx8550/common/time.c
> b/arch/mips/philips/pnx8550/common/time.c
> index 08ebc3d..9d9fc71 100644
> --- a/arch/mips/philips/pnx8550/common/time.c
> +++ b/arch/mips/philips/pnx8550/common/time.c
> @@ -80,6 +80,7 @@ void pnx8550_time_init(void)
>        */
>       mips_hpt_frequency = 27UL * ((1000000UL * n)/(m * pow2p));
>       cpj = (mips_hpt_frequency + HZ / 2) / HZ;
> +     write_c0_count(0);
>       timer_ack();
>  
>       /* Setup Timer 2 */
> 

I too caqme to this conclusion and you are correct it does indeed fix the
problem.  The kernel now boots straight through to the prompt.
Thanks
Dan
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