Messages in this thread | | | From | David Mosberger <> | Date | Tue, 17 Jun 2003 15:34:24 -0700 | Subject | Re: [patch] input: Fix CLOCK_TICK_RATE usage ... [8/13] |
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>>>>> On Wed, 18 Jun 2003 00:21:46 +0200, Vojtech Pavlik <vojtech@suse.cz> said:
Vojtech> It seems to be used for making beeps, even on that Vojtech> architecture.
Don't confuse architecture and implementation. There are _some_ machines (implementations) which have legacy support. But the architecture is explicitly designed to allow for legacy-free machines, as is the case for the hp zx1-based machines, for example.
It seems to me that input/misc/pcspkr.c is doing the Right Thing:
count = 1193182 / value;
spin_lock_irqsave(&i8253_beep_lock, flags);
if (count) { /* enable counter 2 */ outb_p(inb_p(0x61) | 3, 0x61); /* set command for counter 2, 2 byte write */ outb_p(0xB6, 0x43); /* select desired HZ */ outb_p(count & 0xff, 0x42); outb((count >> 8) & 0xff, 0x42);
so if a legacy speaker is present, it assumes a particular frequency. In other words: it's a driver issue. On ia64, this frequency certainly has nothing to do with time-keeping and therefore doesn't belong in timex.h.
--david - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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