Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override.

[Rene Herman]

On 01-01-08 22:42, Christer Weinigel wrote:

> The data sheet for the Intel M8259A says:
>
>     End of /RD to Next Command: 300 ns
>     End of /WR to Next Command: 370 ns
>
> On the other hand, I don't know how all the i8253/i8259 clones or the
> numerous variants of Super I/O chips behave.  It wouldn't surprise me
> if some Super I/O chip uses the ISA bus clock to latch the values
> internally so that the delay is dependent on the bus frequency instead.

I wouldn't even be surprised if most all would...

Rene.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/