On 10/31/2013 02:46 PM, Vineet Gupta wrote:
> On 10/31/2013 06:57 AM, Chen Gang wrote:
>> On 10/26/2013 09:18 PM, Chen Gang wrote:
>>> On 10/25/2013 01:29 PM, Greg KH wrote:
>>>> No, just use the platform-specific SERIAL_PORT_DNFS, instead of having a
>>>> copy of it here in this driver, which is just wrong. So please remove
>>>> this, and just rely on the system version of this, defining it to
>>>> "nothing" if it isn't present, like the 8250 serial driver does it.
>>>>
Oh, sorry, I misunderstand your meaning.
>>> Hmm... excuse me, I am not quite familiar with it, I will consult
>>> related member.
>>>
>>> Hello Vineet, I have 2 questions to consult you, please help check:
>>>
>>> - can arc support this driver? ("drivers/staging/speakup/serialio.c")
>
> No I don' think it is relevant for ARC - but nevertheless as a general rule,
> it
> should still build for ARC.
>
>>> - if arc supports the driver, can arc let it be initialized statically?
>>> (not dynamically, e.g. BASE_BAUD).
>
> Like Greg said it needs to be fixed in the driver, just like 8250 does.
>
> If this driver needs a specific definition of SERIAL_PORT_DFNS, that needs to
> come
> from platform's asm/serial.h w/o littering all other arches with an
> irrelevant ifdef.
>
>> After scan "arch" and "drivers" sub-directory:
>>
>> - arc and openrisc define BASE_BAUD as non-constant number, and like most
>> of architectures, neither of them provide SERIAL_PORT_DFNS.
>>
>> - frv and parisc define SERIAL_PORT_DFNS as empty, for all other
>> architectures who already define SERIAL_PORT_DFNS, they also use BASE_BAUD
>> on it.
>>
>> - for all drivers, they treat SERIAL_PORT_DFNS as 'constant' to initialize
>> static variables statically.
>>
>> So for me, we need defind SERIAL_PORT_DFNS as empty for arc and
>> openrisc, since they can not treate BASE_BAUD as constant number.
>
> No, please fix the driver instead.
>
OK, thanks, I will send patch v2.
Thanks.
--
Chen Gang
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