Arm sub architectures missing clk_round_rate()

[Haojian Zhuang]

On Sat, Jun 8, 2013 at 5:21 PM, Russell King - ARM Linux
<linux at arm.linux.org.uk> wrote:
> On Sat, Jun 08, 2013 at 09:57:17AM +0100, Jonathan Cameron wrote:
>> At least one Arm subarch (pxa) does no provide an implementation of this
>> function.  As far as I can see there is no way for a driver wishing to use
>> it to detect it's absence.  This is marked in clk.h as being optional
>> for 'Machine Class support'. Obvious solutions to this are:
>>
>> 1) It is effectively only usable by platform specific drivers as no
>>    more generic driver can know it is available.  Perhaps even a stub that
>>    returns an appropriate error would be acceptable.
>>
>> 2) It is not as optional as the header implies and should always be implemented
>>    if the rest of the clk framework is.
>>
>> 3) There should be some means of detecting its absense so that drivers can
>>    be dependant on its presene.
>>
>> Which is the correct one?
>
> The right answer is (2) now that we have things like the clk framework and
> soo many users.

Yes, we need to fix it. I'll handle it.

Regards
Haojian