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Wed, 5 Dec 2018 11:06:15 +0000 (GMT) From: Lukasz Luba To: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org Cc: tjakobi@math.uni-bielefeld.de, myungjoo.ham@samsung.com, kyungmin.park@samsung.com, cw00.choi@samsung.com, rjw@rjwysocki.net, len.brown@intel.com, pavel@ucw.cz, gregkh@linuxfoundation.org, keescook@chromium.org, anton@enomsg.org, ccross@android.com, tony.luck@intel.com, robh+dt@kernel.org, mark.rutland@arm.com, kgene@kernel.org, krzk@kernel.org, m.szyprowski@samsung.com, b.zolnierkie@samsung.com, Lukasz Luba Subject: [PATCH v3 0/5] devfreq: handle suspend/resume Date: Wed, 5 Dec 2018 12:05:51 +0100 Message-Id: <1544007956-28889-1-git-send-email-l.luba@partner.samsung.com> X-Mailer: git-send-email 2.7.4 X-Brightmail-Tracker: H4sIAAAAAAAAA0VSeUiTcRje77uVZp9L6u1AaCA0STsw+0F2QdFXUAT9E2XUqs8VuWn70rLL ZaRrWeo61LKMrJzzymVzrnXMVqvMm7KDIgnpskuzKKTya4v+e97neJ/3j5cjVe/ocdxmwzbR aNAmq5lQynnnR1uMpo5NnPrTNQJ7r2hwXVEtjRvqvtG4++trGpf6Wmm8v6yWwQ8O6XHeq/ck bmu7xOKWrD4WPzVNwCePXSOw49UjGne5Sxg8cNiHcFHbdQJX+56z+EJ3B4Gf7bMx+Pn928M7 mjtpfOCaj8XZlZ9p3Nf+gpoHgvOqkxaqzlQh4ZSpgxLy8/qRUOZ5SwgO+0FGuHG6ihUun88U ft1hBe9HDyHUP8yhhCP1diTYKr+zwoAjcnnYqtCEjWLy5nTROGXOutBNWYN+ItUXvsO9r4Ix IVuYBYVwwMeBp2aIsKBQTsXbEFTe2M8Ghq8Iai19TGAYQFBd3EP+i7w94gwK5QiK+ov/R4Y+ OCkL4jiGjwWXfasciODLEHS6NLKH5O+S4P5iJWTPKD4eOk0LZQ/FR0Hj435Cxkp+CXhy/ESg LBKetB4k5SzwBRz4u9qpgLAArnt62AAeBe/89UE8AX43lgbDErSY7UwA74ace66gZxbc8nfQ 8g0kr4Fa95QAPR9qHGZSpoEPg8cfwmWaHIZWZ2GQVoI5WxVwT4L63PZg0WgorzoRXC7A+0/W v0eq+DVQavMy+Sjy5P+uswjZ0RgxTdLrRGmaQdweK2n1UppBF7shRe9Awx/Y/Mvf70KDneub EM8h9QglHGMSVbQ2XcrQNyHgSHWE0pbAJqqUG7UZO0VjylpjWrIoNaHxHKUeo9yleLlaxeu0 28QtopgqGv+pBBcyzoTWKu+Z3S9aIrae61GkfXpabPBb7VmLBydHnlcvilOsCHum682dsTI1 I/rE75jMvTNnr1mvfr3rVJKCq56eGS5FWc1eXdebRYocvufo0QZvfn68Jmm1ZfKyoaTtN+fG O1aUXJw4dmRhQcXUxgvZ3UtbNRU1lXtScpugNWZkelzv8QadmpI2aadFk0ZJ+wf/ncgTfQMA AA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrIIsWRmVeSWpSXmKPExsVy+t/xu7oaG9ljDGZvFbQ4uFXTYuOM9awW 2zd+Y7W4/uU5q8X8I+dYLZoXr2ezONOda9H/+DWzxfnzG9gtzja9Ybe41SBjMWvKXiaLTY+v sVpc3jWHzeJz7xFGixnn9zFZrD1yl91i6fWLTBa3G1ewWdw9dRRoxulLrBate4+wW7St/sBq 8ebCPRYHCY9tu7exeqyZt4bRY3bDRRaPCf2fGD0W73nJ5LFpVSebx/65a9g9Ni+p9/h3jN3j 4Ls9TB5brrazePRtWcXosWL1d3aPz5vkAvii9GyK8ktLUhUy8otLbJWiDS2M9AwtLfSMTCz1 DI3NY62MTJX07WxSUnMyy1KL9O0S9DKavh5nKjgiWLGrcSVbA+MKvi5GTg4JAROJl33b2EBs IYGljBKvD+VBxMUkJu3bzg5hC0v8udYFVMMFVPOJUaLp0WvGLkYODjYBPYkdqwpB4iICyxkl 7v+czQ7iMAs8YJboeL6JFaRIWMBM4lKDK8ggFgFViZ03PjGB2LwCXhJ72o8zQSyQk7h5rpN5 AiPPAkaGVYwiqaXFuem5xUZ6xYm5xaV56XrJ+bmbGIHRt+3Yzy07GLveBR9iFOBgVOLhlZjC FiPEmlhWXJl7iFGCg1lJhHeFDXuMEG9KYmVValF+fFFpTmrxIUZToOUTmaVEk/OBiSGvJN7Q 1NDcwtLQ3Njc2MxCSZz3vEFllJBAemJJanZqakFqEUwfEwenVAOjhUON+EfRDQLs5vOl41vk ti3iTH5yh+/Gf7k1ZheVX0xo4dio+uPz22sf/i7YP02c7xbzZYXiC94J80zauluuTXnn035j xd2EE1pMfkv139gr39c4/euqZn2Tdq4b2zWBBZ2bajKqE/RPiy0olu8LWGxk9t2+6mP1dH/v M1JyMb+F3s1f0N6nxFKckWioxVxUnAgAiOPxsdQCAAA= X-CMS-MailID: 20181205110616eucas1p1e0e17b0c6a96c3b6d77516d4b02de8b1 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20181205110616eucas1p1e0e17b0c6a96c3b6d77516d4b02de8b1 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20181205110616eucas1p1e0e17b0c6a96c3b6d77516d4b02de8b1 References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, This v3 patch set aims to address the issue with devfreq devices' frequency during suspend/resume. It extends suspend/resume by calls to Devfreq framework. In the devfreq framework there is a small refactoring to avoid code duplication in changging frequency (patch 1) and there are extensions for suspending devices. The suspending device has now chance to set proper state when the system is going for suspend. This phase is the right place to set needed frequences for the next resume process. It has been tested on Odroid u3 with Exynos 4412. The patch set draws on Tobias Jakobi's work posted ~2 years ago, who tried to solve issue with devfreq device's frequency during suspend/resume. During the discussion on LKML some corner cases and comments appeared related to the design. This patch set address them keeping in mind suggestions from Chanwoo Choi. Tobias's paches: https://www.spinics.net/lists/linux-samsung-soc/msg56602.html Changes: v3: - cleaned commit messages according to Chanwoo's comments - moved atomic operation to beggining of function in devfreq_{suspend|resume}_device() - changed dev_warn() to dev_err() with also new error message, when devfreq_{suspend|resume}() failed v2: - refactored patchset and merget patch 1 and 3 as suggested by Chanwoo Choi, - changed devfreq_{susped|resume}_device functions, - added doxygen information for new entres in 'struct devfreq', - devfreq_set_target skipped one argument, now resume_freq is set inside, - minor changes addresing comments from maintainers regarding the style, Regards, Lukasz Luba Lukasz Luba (5): devfreq: refactor set_target frequency function devfreq: add support for suspend/resume of a devfreq device devfreq: add devfreq_suspend/resume() functions drivers: power: suspend: call devfreq suspend/resume arm: dts: exynos4: opp-suspend in DMC and leftbus arch/arm/boot/dts/exynos4210.dtsi | 2 + arch/arm/boot/dts/exynos4412.dtsi | 2 + drivers/base/power/main.c | 3 + drivers/devfreq/devfreq.c | 153 ++++++++++++++++++++++++++++++-------- include/linux/devfreq.h | 13 ++++ 5 files changed, 141 insertions(+), 32 deletions(-) -- 2.7.4