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I followed your advice : I used the UART layer.
It is easier.
Thanks


Benjamin Herrenschmidt a écrit :
> On Tue, 2008-09-02 at 09:34 +0200, Sébastien Chrétien wrote:
>   
>> ok is it a bad way to write a tty driver ? why ?
>>     
>
> Not necessarily, it's just overkill. The UART layer handles a lot
> of stuff for you. The tty layer is tricky to get right.
>
> Cheers,
> Ben.
>
>
>