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

From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: linux-clk <linux-clk@vger.kernel.org>,
	Linux PM list <linux-pm@vger.kernel.org>,
	"linux-samsung-soc@vger.kernel.org"
	<linux-samsung-soc@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	Stephen Boyd <sboyd@codeaurora.org>,
	Michael Turquette <mturquette@baylibre.com>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Sylwester Nawrocki <s.nawrocki@samsung.com>,
	Chanwoo Choi <cw00.choi@samsung.com>,
	Inki Dae <inki.dae@samsung.com>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Subject: Re: [PATCH v9 0/5] Add runtime PM support for clocks (on Exynos SoC example)
Date: Tue, 22 Aug 2017 11:21:02 +0200	[thread overview]
Message-ID: <CAMuHMdUy5hi3fLVW6J1o=D194ASjr7Vz-pjWtddHyybK4RZxxA@mail.gmail.com> (raw)
In-Reply-To: <1503302703-13801-1-git-send-email-m.szyprowski@samsung.com>

Hi Marek,

On Mon, Aug 21, 2017 at 10:04 AM, Marek Szyprowski
<m.szyprowski@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/?

Thanks!

Gr{oetje,eeting}s,

                        Geert (collecting momentum for the patch
referenced above)

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds