[PATCH 0/2] ARM: Exynos4: Migrate to common clock framework.

Thomas Abraham thomas.abraham at linaro.org
Mon Oct 8 02:32:15 EDT 2012

Hi Tomasz,

Thanks for reviewing this patch series.

On 3 October 2012 16:26, Tomasz Figa <t.figa at samsung.com> wrote:
> Hi Chander, Thomas,
> On Monday 01 of October 2012 17:39:19 chander.kashyap at linaro.org wrote:
>> From: Thomas Abraham <thomas.abraham at linaro.org>
>> This patch series migrates Exynos4 clock support to common clock
>> framework. The first patch in this series removes the existing Exynos4
>> clock support that uses the Samsung specific clock framework. The second
>> patch in this series add Exynos4 clock support using common clock
>> framework.
>> Thomas Abraham (2):
>>   ARM: Exynos4: Remove Samsung clock type support
>>   ARM: Exynos4: Register clocks via common clock framework
> I think the order of changes is a little bit off here:
>  - patch 1 will break all exynos4-based boards (what about bisects?)
>  - patch 2 will be still broken until all related drivers get converted to
> use clk_prepare(_enable) and clk_(disable_)unprepare.

Ok. I got the sequence wrong and I have fixed this in the next version.

> Shouldn't the order be exactly opposite, i.e.:
>  - all the patches for prepare/unprepare first
>  - then the patch adding common clock frameworks support for exynos4
> (disabling the old clock code)
>  - and finally the patch removing remaining (disabled by previous patch)
> code.


> Also, I assume that these patches doesn't consider native device tree
> support (without auxdata, using OF-based clock lookup), correct me if I'm
> wrong. If I'm right, since Exynos SoCs are going to be DT-only, is there
> really a point for adding common clock framework support for non-DT
> platforms (which are going to be eventually dropped anyway)?

The non-dt Exynos4 platforms require some effort to get basic device
tree support into them. Until then, the common clock support for them
are required. I have added device tree support as well in the second
version of this patch series.


> Best regards,
> --
> Tomasz Figa
> Samsung Poland R&D Center

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