Messages in this thread | | | Subject | Re: TI yenta-alikes (was: ToPIC specific init for yenta_socket) | From | Alan Cox <> | Date | 07 Aug 2003 13:18:15 +0100 |
| |
On Iau, 2003-08-07 at 10:02, Russell King wrote: > doing is *wrong*. The only people who know whether the pin has been > wired for INTA or IRQ3 are the _designers_ of the hardware, not the > Linux kernel.
That assumes the yenta controller isnt hotplugged.
> Currently, the Linux kernel assumes a "greater than designers" approach > to fiddling with the registers which control the function of these pins, > and so far I've seen: > > - changing the mode from serial PCI interrupts to parallel PCI interrupts > causes the machine to lock hard (since some cardbus controllers use the > same physical pins for both functions.)
Basically we got burned by changing the IRQMUX register rather than just using it as an information source.
- 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/
| |