Re: [RFC][PATCH] Xilinx uartlite serial driver

["David H. Lynch Jr." <dhlii@dlasys.net>]

Peter Korsgaard wrote:
>>>>>> "David" == David H Lynch <dhlii@dlasys.net> writes:
>>>>>>             
>
> Hi,
>
>  David> 	You need an "early_serial_setup()" routine inside the
>  David> CONFIG_SERIAL_UARTLITE_CONSOLE code.
>
> Isn't that just for early serial support?
>
>   
    Honestly,  I can not tell. It is implimented in 8250.c, and I think 
some other drivers. I think it was  related to early_serial. But I think 
that is now moved into the main driver, not a separate early_serial driver.
    I stubbed it out to nothing just to make the linker happy and 
noticed no obvious difference in behavior. But due to printk buffering, 
it might be very hard to see a difference - unless there was an early 
failure.

    What I know is that:
                 the ml403 8250 support (as well as many other drivers), 
impliment it
                 that they pass a uart_port structure
                 and that it may be called for each port,
               
    I beleive that it may be more important than the uartlite_tty.c and 
uartlite_dbg.c that get used very breifly by much earlier code.
    But I am just guessing.
   
    I know that my driver impliments it and as a result I usually see 
messages up to the moment of failure when there is a failure, and do not 
get into a bind because they are stuck in a printk buffer.




 





-- 
Dave Lynch 					  	    DLA Systems
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Over 25 years' experience in platforms, languages, and technologies too numerous to list.

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