RE: Serial custom speed deprecated?

[Stuart MacDonald]

From: On Behalf Of Rogier Wolff
> Note that IMHO, we should have started hiding this mess from /drivers/
> a long time ago. The tty layer should convert the B_9600 thingies to
> "9600", the integer, and then call the set_termios function. The
> driver should be prohibited from looking at how the the baud rate came
> to be 9600, and attempt to approach the requested baud rate as good as
> possible. It might return a flag somewhere: Not exact. In the example
> above, the resulting baud rate is about 1.4 baud off: 9598.6. This is
> not a problem in very many cases.
> 
> Once this is in place, you lose a lot of "figure out the baud rate
> integer from the B_xxx settings" code in all the drivers, as well as
> that we get to provide a new interface to userspace without having to
> change ALL drivers at the same time. This decouples the drivers from
> the kernel<->userspace interface.

I'll second the motion. :-)

..Stu

-
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/