[PATCH v9 0/5] Add runtime PM support for clocks (on Exynos SoC example)

[Marek Szyprowski]

Hi Geert,

On 2017-08-22 11:21, Geert Uytterhoeven wrote:
> On Mon, Aug 21, 2017 at 10:04 AM, Marek Szyprowski
> <m.szyprowski at samsung.com> wrote:
>> Patches for clocks drivers change the way the clock provider is initialized.
>> Instead of CLK_OF_DECLARE based initialization, a complete platform device driver
>> infrastructure is being used. This is needed to let driver to use runtime PM
>> feature and integrate with generic power domains. The side-effect of this change
>> is a delay in clock provider registeration during system boot, so early
>> initialized drivers might get EPROBEDEFER error when requesting their clocks.
>> This was an issue for IOMMU drivers, but IOMMU deferred probe support has been
>> finally merged to v4.13-rc1 and now it is handled correctly.
> Any chances you have PHY devices falling back to polling due to this,
> cfr. https://patchwork.kernel.org/patch/9734175/?

At least in case of Exynos5433 all related PHY drivers correctly handle 
deferred
probe and don't fallback to half-functional mode.

Best regards

-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland