From: Marek Szyprowski <m.szyprowski@samsung.com>
To: Geert Uytterhoeven <geert@linux-m68k.org>
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 11:27:06 +0200 [thread overview]
Message-ID: <e53af278-061d-bc9b-6f05-65c5e5491d00@samsung.com> (raw)
In-Reply-To: <CAMuHMdUy5hi3fLVW6J1o=D194ASjr7Vz-pjWtddHyybK4RZxxA@mail.gmail.com>
Hi Geert,
On 2017-08-22 11:21, Geert Uytterhoeven wrote:
> 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/?
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
WARNING: multiple messages have this Message-ID (diff)
From: m.szyprowski@samsung.com (Marek Szyprowski)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v9 0/5] Add runtime PM support for clocks (on Exynos SoC example)
Date: Tue, 22 Aug 2017 11:27:06 +0200 [thread overview]
Message-ID: <e53af278-061d-bc9b-6f05-65c5e5491d00@samsung.com> (raw)
In-Reply-To: <CAMuHMdUy5hi3fLVW6J1o=D194ASjr7Vz-pjWtddHyybK4RZxxA@mail.gmail.com>
Hi Geert,
On 2017-08-22 11:21, Geert Uytterhoeven wrote:
> 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/?
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
next prev parent reply other threads:[~2017-08-22 9:27 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20170821080538eucas1p1e273ef22920493ee406ef546bcc230e5@eucas1p1.samsung.com>
2017-08-21 8:04 ` [PATCH v9 0/5] Add runtime PM support for clocks (on Exynos SoC example) Marek Szyprowski
2017-08-21 8:04 ` Marek Szyprowski
[not found] ` <CGME20170821080538eucas1p2fc5723914c314e6fe5da19bed55dd5bd@eucas1p2.samsung.com>
2017-08-21 8:04 ` [PATCH v9 1/5] clk: Add support for runtime PM Marek Szyprowski
2017-08-21 8:04 ` Marek Szyprowski
[not found] ` <CGME20170821080539eucas1p282557b6f1885f1714b08096ab3724c25@eucas1p2.samsung.com>
2017-08-21 8:05 ` [PATCH v9 2/5] clk: samsung: " Marek Szyprowski
2017-08-21 8:05 ` Marek Szyprowski
[not found] ` <CGME20170821080539eucas1p2ff5addf7ece8ad54c0c885a938f97880@eucas1p2.samsung.com>
2017-08-21 8:05 ` [PATCH v9 3/5] clk: samsung: exynos5433: " Marek Szyprowski
2017-08-21 8:05 ` Marek Szyprowski
[not found] ` <CGME20170821080540eucas1p25bd0c482fdb581bca68bc875bdfedc87@eucas1p2.samsung.com>
2017-08-21 8:05 ` [PATCH v9 4/5] clk: samsung: exynos-audss: Use local variable for controller's device Marek Szyprowski
2017-08-21 8:05 ` Marek Szyprowski
[not found] ` <CGME20170821080540eucas1p2e07bb23e15027aca9563316a5fbf1597@eucas1p2.samsung.com>
2017-08-21 8:05 ` [PATCH v9 5/5] clk: samsung: exynos-audss: Add support for runtime PM Marek Szyprowski
2017-08-21 8:05 ` Marek Szyprowski
2017-08-22 9:21 ` [PATCH v9 0/5] Add runtime PM support for clocks (on Exynos SoC example) Geert Uytterhoeven
2017-08-22 9:21 ` Geert Uytterhoeven
2017-08-22 9:27 ` Marek Szyprowski [this message]
2017-08-22 9:27 ` Marek Szyprowski
2017-09-08 0:59 ` Michael Turquette
2017-09-08 0:59 ` Michael Turquette
2017-09-08 0:59 ` Michael Turquette
2017-09-11 12:57 ` Marek Szyprowski
2017-09-11 12:57 ` Marek Szyprowski
2017-09-11 12:57 ` Marek Szyprowski
2017-09-26 10:04 ` Marek Szyprowski
2017-09-26 10:04 ` Marek Szyprowski
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