RE: Dell BIOS and HPET timer support

["Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>]

I think do_div expects a 64 bit 1st argument. Can you change ns to
unsigneld long long and try...

Thanks,
Venki 

>-----Original Message-----
>From: Jon Smirl [mailto:jonsmirl@gmail.com] 
>Sent: Wednesday, June 08, 2005 6:38 PM
>To: Lee Revell
>Cc: Pallipadi, Venkatesh; lkml; Bob Picco
>Subject: Re: Dell BIOS and HPET timer support
>
>On 6/8/05, Lee Revell <rlrevell@joe-job.com> wrote:
>> Check the source, it's self-explanatory.  See hpet_alloc().
>
>What is going on with do_div()? 
>0x0429b17f /100000 = 69.8 in my caculator. It comes back as 0 
>from do_div().
>
>[jonsmirl@jonsmirl ~]$ dmesg | grep HPET
>HPET: cap 0429b17f8086a201 period 0429b17f
>HPET: period 0429b17f ns 0429b17f
>HPET: period 0429b17f ns 00000000
>Using HPET for base-timer
>Using HPET for gettimeofday
>[jonsmirl@jonsmirl ~]$
>
>
>	hpetp->hp_period = (cap & HPET_COUNTER_CLK_PERIOD_MASK) >>
>	    HPET_COUNTER_CLK_PERIOD_SHIFT;
>printk(KERN_ERR "HPET: cap %016llx period %08lx\n", cap, 
>hpetp->hp_period);
>
>	ns = hpetp->hp_period;	/* femptoseconds, 10^-15 */
>printk(KERN_ERR "HPET: period %08lx ns %08lx \n", 
>hpetp->hp_period, ns);
>	do_div(ns, 1000000);	/* convert to nanoseconds, 10^-9 */
>printk(KERN_ERR "HPET: period %08lx ns %08lx \n", 
>hpetp->hp_period, ns);
>	printk(KERN_INFO "hpet%d: %ldns tick, %d %d-bit timers\n",
>		hpetp->hp_which, ns, hpetp->hp_ntimer,
>		cap & HPET_COUNTER_SIZE_MASK ? 64 : 32);
>-- 
>Jon Smirl
>jonsmirl@gmail.com
>
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