[PATCH v4 2/2] ARM: OMAP3/4: iommu: adapt to runtime pm

[Ohad Ben-Cohen]

Hi Omar,

On Thu, Nov 15, 2012 at 6:53 PM, Omar Ramirez Luna <omar.luna at linaro.org> wrote:
> On 14 November 2012 03:54, Ohad Ben-Cohen <ohad at wizery.com> wrote:
>> Most of the above questions imply this patch not only converts the
>> iommu to runtime PM, but may carry additional changes that may imply
>> previous implementation is sub-optimal. I hope we can clearly document
>> the motivation behind these changes too (maybe even consider
>> extracting them to a different patch ?).
>
> I didn't want to extract this changes into different patches since
> they could be included in this one, otherwise it would look like lines
> adding and then deleting runtime pm functions.
>
> I do agree description is missing, again I thought I had done this
> somewhere but looks like I didn't, will update these. If you think
> these should be different patches please let me know, otherwise I
> would like to keep a single *documented* patch.

It seems like there are 3 different logical changes here:

1. remove clk_* invocations from iommu_fault_handler()
2. keep clocks enabled as long as iommu is enabled
3. convert to runtime pm

If we split this to three patches in this order, you won't have to add
and remove runtime pm functions.

Let's do it, please. It's a small nuisance now, but may be really
helpful in the future when someone tries to debug stuff and understand
the motivation behind these changes. It'd make it much easier for you
to document the changes, too: you have an entire commit log per
change.

Thanks,
Ohad.