On Tue, 2009-06-09 at 18:39 -0500, Dave Mitchell wrote:
> This patch adds the UPF_FIXED_TYPE flag which will bypass the
> 8250's autoconfig probe for uart type. The uart type identified
> by the of_serial's parse of the flat device tree will be utilized
> as defined.
> 
> Signed-off-by: Dave Mitchell <dmitch...@amcc.com>
> ---
>  drivers/serial/of_serial.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/serial/of_serial.c b/drivers/serial/of_serial.c
> index 14f8fa9..3f2027c 100644
> --- a/drivers/serial/of_serial.c
> +++ b/drivers/serial/of_serial.c
> @@ -67,7 +67,7 @@ static int __devinit of_platform_serial_setup(struct 
> of_device *ofdev,
>       port->type = type;
>       port->uartclk = *clk;
>       port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP
> -             | UPF_FIXED_PORT;
> +             | UPF_FIXED_PORT | UPF_FIXED_TYPE;

I think we /probably/ want a similar change in legacy_serial.c, for soc
ports at least.

Or do people have things that are compatible "ns16550" but aren't?

cheers

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