Re: [RFC 1/8] serial:st-asc: Add ST ASC driver.

[Jean-Christophe PLAGNIOL-VILLARD]

On May 9, 2013, at 12:31 AM, Arnd Bergmann <arnd@xxxxxxxx> wrote:

> On Wednesday 08 May 2013, Greg KH wrote:
>>> just mention there is not hardware reason to not use the generic ttySx
>>> in place of ttyAS as we have only one IP that handle serial on this
>>> family of SoC
>>> 
>>> personally I'll switch to ttySx
>> 
>> Great, then you can use the same major/minor range as well, so there's
>> no more objection from me about this :)
> 
> Does that work these days when you have kernel with multiple built-in
> uart drivers?

not for very long time and no this family
> 
> I think it would be good if all uarts were using the same name space
> and major/minor numbers, but I think the mess we currently have is
> the result of the tty_register_driver() interface reserving the
> device number range at driver load time, independent of the presence
> of devices.  I would assume that normal distro kernels always ship
> with an 8250 driver built-in to allow using that as the console,
> and if I read the code correctly, that currently prevents another
> uart driver from registering the same major/minor numbers.

so we need to fix this
> 
> 	Arnd
> 
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