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Wed, 21 Nov 2018 18:01:55 +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 0/6] devfreq: handle suspend/resume Date: Wed, 21 Nov 2018 19:01:35 +0100 Message-Id: <1542823301-23563-1-git-send-email-l.luba@partner.samsung.com> X-Mailer: git-send-email 2.7.4 X-Brightmail-Tracker: H4sIAAAAAAAAA0VSeUiTYRz23bfvcDX5WodvZiajUqPshpeMSqj4OqAgCnJ2rPpQ01nt0y7D VpFX6soOhx2WVto2z6aZpaVOrVkei1qWZrAgygOPzQqktfmt+u/5Pcfv+b3wUpikF/ehomLj WGWsPEZKiISVTb9aF1y9aZctUj+Zi+oqglCZpgRHj8pGcWSxfcVRrrEVR+fySwj06oICqa29 GGprKyXR67N9JPqg8kU5V2oEqNz6Dkdvqm8QaCTDCJCmrVaAiozdJLpn6RCgj2cKCdRtanTu aDHj6HyNkURJukEc9bV/Eq6BTOWTSpzR39ID5rqqQ8hcVA8DJv/pNwFTrk0lmGc39STz8O5p 5ncTydQNPBUwhrfJQibToAVMoe4HyYyU+231ChOtPMDGRB1llQtX7RVF1ibrycM9E45fNptw FXjumQY8KUgvg13DL/A0IKIkdCGAnaV3MH6wAWhocgj5YQRAe54R/xsZTPpM8EIBgLl1nfi/ yE+dwalQFEEHwyrtEVdgCp0PoLkqyOXB6BcYrB7KEriEyfRSOJZRAVxYSM+B979bxxvE9EZo +ml2t/nBztbU8ZsgfYmCmekqjBfWwlHDEMHjyfB7s4HksS90PM4V8JiDr1O0bs8pmPyyyu0J gQ3NHbjrUIwOgiXVC3k6FHbUfsBcNKS94Pv+SS4ac8Ksymw3LYYpSRLeHQgN6e3uommwQH/N vZyBmr5P46+S0LvgmK0Xvwj8cv533QZAC7zZeE4RwXKLY9ljwZxcwcXHRgTvP6QoB84v2PK7 ebgK2M376gFNAelEceBOu0yCy49yJxT1AFKYdIo4JcxJiQ/IT5xklYf2KONjWK4ezKCEUm9x gsdnmYSOkMex0Sx7mFX+VQWUp48KVJyM6hpzqLd1iVf0ZIcNXmqcvt5nNGRD2lC4rw31+Ntk pebwdRn2gIR0q2pTrYfmS8uWgwGzUj4mbH8MGo/PnhlanFtiIiL9c5bM985aPbVYEtGvC3cU DETvyCMyGzSWIlGZOu+BV/T5cP/Ebe1BA8vDUle9Pde/e9hXvFlnSbRIhVykfPE8TMnJ/wDf dBp3fgMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrEIsWRmVeSWpSXmKPExsVy+t/xe7pT5n6NNniwWcXi4FZNi40z1rNa bN/4jdXi+pfnrBbzj5xjtWhevJ7N4kx3rkX/49fMFufPb2C3ONv0ht3iVoOMxawpe5ksNj2+ xmpxedccNovPvUcYLWac38dksfbIXXaLpdcvMlncblzBZnH31FGgGacvsVq07j3CbtG2+gOr xZsL91gcJDy27d7G6rFm3hpGj9kNF1k8JvR/YvRYvOclk8emVZ1sHvvnrmH32Lyk3uPfMXaP g+/2MHlsudrO4tG3ZRWjx4rV39k9Pm+SC+CL0rMpyi8tSVXIyC8usVWKNrQw0jO0tNAzMrHU MzQ2j7UyMlXSt7NJSc3JLEst0rdL0MvY176GveA+d8XkS6dYGxgPcHYxcnJICJhIfGh7wNbF yMUhJLCUUeJC8wU2iISYxKR929khbGGJP9e6wOJCAp8YJbqv+nQxcnCwCehJ7FhVCNIrIrCc UeL+z9nsIA6zwANmiY7nm1hBGoQFjCX+9G5lBLFZBFQllr16DBbnFfCSOPXjEivEAjmJm+c6 mScw8ixgZFjFKJJaWpybnltsqFecmFtcmpeul5yfu4kRGH/bjv3cvIPx0sbgQ4wCHIxKPLwa kV+jhVgTy4orcw8xSnAwK4nwdkQBhXhTEiurUovy44tKc1KLDzGaAi2fyCwlmpwPTA15JfGG pobmFpaG5sbmxmYWSuK85w0qo4QE0hNLUrNTUwtSi2D6mDg4pRoYJXQaz1ubBq/mUn3OY7sx gKunxHWR4rdHorGBV6Oj3/7nMD55fKle6FyPxh/1du0vv85Wrfhf1Wl9xfKA/0Flh+DSs17L lJevyzaJc79ePnWZ7NzQx+unJ/2XVFY7y7vgnK/Oy5ZdN/vufOP3svnmadPBv0xg3uOX/iGb E3dJVpa091UcFopQYinOSDTUYi4qTgQA8pBaYtUCAAA= X-CMS-MailID: 20181121180156eucas1p225af7f4341a039264ff26f2a9ad9bb12 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20181121180156eucas1p225af7f4341a039264ff26f2a9ad9bb12 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20181121180156eucas1p225af7f4341a039264ff26f2a9ad9bb12 References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, This 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 2) and there are extensions for suspending devices. 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 Regards, Lukasz Luba Lukasz Luba (6): devfreq: add basic fileds supporting suspend functionality 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: set opp-suspend for 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 | 159 ++++++++++++++++++++++++++++++-------- include/linux/devfreq.h | 11 +++ 5 files changed, 146 insertions(+), 31 deletions(-) -- 2.7.4