Re: make 16C950 UARTs work

From: Russell King
Date: Wed Aug 02 2006 - 17:58:21 EST

On Wed, Aug 02, 2006 at 11:08:56PM +0100, Alan Cox wrote:
> Ar Mer, 2006-08-02 am 15:49 -0400, ysgrifennodd Dave Jones:
> > This patch has been submitted a number of times, and doesn't seem
> > to get any upstream traction, which is a shame, as it seems to work
> > for users, and I keep inadvertantly dropping it from the Fedora
> > kernel everytime I rebase it.
> We really ought to do that based on the PCI subvendor/subdevice id of
> the boards in use if possible surely ? It ought to be safe for x86
> because nobody is going to use anything but chip default values so they
> can avoid needing a ROM.

Not correct - there are PCMCIA-based versions of these chips and they
do have weirdo values in the registers to cope with custom crystals
which magically vanish if you reset the UART.

dwmw2's 950-based bluetooth CF card does exactly this.

Russell King
Linux kernel 2.6 ARM Linux -
maintainer of: 2.6 Serial core
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