Serial: Initial refactor

[Okash Khawaja]

Got it, thanks


> On 18 Nov 2016, at 12:39, Samuel Thibault <samuel.thibault at ens-lyon.org> wrote:
> 
> Okash Khawaja, on Fri 18 Nov 2016 09:20:08 +0000, wrote:
>> Cool. So we start with spk_serial_out() by replacing it with a wrapper wherever
>> it is used in speakup_dummy?
> 
> By replacing it with calling serial_out method, i.e. call synth->serial_out.
> And in all drivers for now, use spk_serial_out for that method.
> 
> Then you can write an spk_serial_out2 which just calls spk_serial_out,
> and make the dummy driver use that for the serial_out method instead of
> spk_serial_out.
> 
>> - add spk_synth_flush2() which is same as spk_synth_flush() but calls
>> spk_serial_out2() instead
>> - add spk_do_catch_up2() which is same as spk_do_catch_up() but calls
>> spk_serial_out2() instead
> 
> No, we don't want to define new functions for these, just make them call
> the serial_out of the synth.
> 
> Samuel