Re: Arm sub architectures missing clk_round_rate()

From: Jonathan Cameron
Date: Sat Jun 08 2013 - 05:33:12 EST

cc'd Eric and Haojian, sorry should have done that in the first place.

On 06/08/2013 10:21 AM, Russell King - ARM Linux 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.
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