Re: Exporting calibrate_delay()

From: Philipp Rumpf (
Date: Sat Aug 26 2000 - 09:51:52 EST

On Fri, Aug 25, 2000 at 06:25:51PM +0100, Russell King wrote:
> No, I'd prefer to keep the things that can reasonably be kept generic without
> too much pain generic, and for that you can adjust the "loops_per_sec" (or
> a derived variable that udelay can use) to compensate for clock speed
> variations.

Should work fine, except for broken drivers which do:

my_delay = loops_per_sec / 10000000 + 1;



shouldn't be an issue though. If you make sure you're not losing too much
precision (basically round loops_per_sec to a suitable boundary or keep the
original value around), I don't see any real problems.

> After all, if you know you've halved the clock speed, you have to double
> loops_per_sec.

halve loops_per_sec, of course.

        Philipp Rumpf
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