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SubjectRe: Re: [PATCHv2 0/8] devfreq: exynos4: Support dt and use common ppmu driver
On 03/17/2014 02:58 AM, Chanwoo Choi wrote:
> Hi Tomasz,
>
> On 03/15/2014 02:58 AM, Tomasz Figa wrote:
>>
>> However, this driver, even after applying your series, is still far
>> from a state that would allow it to be enabled. The most important
>> issue is direct access to CMU registers, based on static mapping,
>> which is not allowed on multiplatform kernels and
>> multiplatform-awareness for drivers is currently a must.
>>
>> To allow this driver to be enabled, it needs to be converted to use
>> common clock framework functions to configure all clocks, e.g.
>> clk_set_rate(), clk_set_parent(), etc., without accessing CMU
>> registers directly.
>>
>> Of course as long as the driver is effectively unusable, to keep
>> development, we can proceed with refactoring it step-by-step and
>> your series would be basically the first step, after addressing the
>> review comments.
>>
>
> I agree your opinion. When setting frequency of memory bus, this
> driver access directly to CMU registers. I know it should be modified
> by using common clk framework as your comment.
>
> I'll send patch set about using common clk framework instead of CMU
> register based on static mapping after finished the review and apply
> of this patch set as next step.

Hi Chanwoo,

any news on this?

I would love to test this devfreq driver with the clk_set_floor_rate API
I'm adding to the common clk framework.

Regards,

Tomeu


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