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Wed, 25 Sep 2019 17:18:42 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p1.samsung.com (KnoxPortal) with ESMTPA id 20190925161841eucas1p12b3b798020b3493e9a4804d98b422f17~Hur5W1Hmf1838118381eucas1p1k; Wed, 25 Sep 2019 16:18:41 +0000 (GMT) Received: from eusmgms1.samsung.com (unknown [182.198.249.179]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20190925161841eusmtrp1d4c1091df9e457d14fbdaabc0a0e93d0~Hur5Vv2fv0531705317eusmtrp1k; Wed, 25 Sep 2019 16:18:41 +0000 (GMT) X-AuditID: cbfec7f2-569ff70000001175-2e-5d8b93629b61 Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms1.samsung.com (EUCPMTA) with SMTP id 1E.14.04166.1639B8D5; Wed, 25 Sep 2019 17:18:41 +0100 (BST) Received: from AMDC3778.digital.local (unknown [106.120.51.20]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20190925161841eusmtip1e43577fed3704a1419143924fac90f79~Hur4priT50494304943eusmtip1K; Wed, 25 Sep 2019 16:18:41 +0000 (GMT) From: Lukasz Luba To: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: b.zolnierkie@samsung.com, krzk@kernel.org, kgene@kernel.org, mark.rutland@arm.com, cw00.choi@samsung.com, kyungmin.park@samsung.com, m.szyprowski@samsung.com, s.nawrocki@samsung.com, myungjoo.ham@samsung.com, robh+dt@kernel.org, willy.mh.wolff.ml@gmail.com, Lukasz Luba Subject: [PATCH 0/3] Exynos5 DMC interrupt mode Date: Wed, 25 Sep 2019 18:18:10 +0200 Message-Id: <20190925161813.21117-1-l.luba@partner.samsung.com> X-Mailer: git-send-email 2.17.1 X-Brightmail-Tracker: H4sIAAAAAAAAA0WSe0iTURjGO9/d1eJzWp5MbQy6k5eoOFBURsL+yIggKUV06pdabto+tSyj WVZrXhZKabIuWqbM5WWK2LxfSkVtmqJhCZpRWLMgbSVF5vys/vu9z/O85zwHDoNLikl3JlaV yKlVijgZJSJqn89Zt0XkZoT63rrugqryK0g0MvuBRPc7XpBIP/kJR1ZrJY36LttoNKrxQObJ YRINWgwUmsnqACjf2oShJx1jNCoeGcDQ67RSCl1t7KBRu+06iexdb8F+Z7npngnInxaM0XKz 8QYlr350Sd76uQGTZ9cYgXzG7HWEDhbtieLiYpM5tc/ecFGMsTGHTugVnbO32nANmGZ0gGYg uwNqxTogYiRsKYCP+/txYZgFMKfIQgjDDIAztXO0DjCLC7l9AYJeAqD5jp76tzE83Uw4QhTr DeuMZ3TAiXFlHwJobw92ZHC2FoPjRjvpMFxYH3hlJA13MMGuh6Y5C+ZgMbsPZnZpFhmy62BZ ZctiJciaaWhuMhCCcRD+asnGBXaBHztraIE9YE9u5lKGh5qsQiBwKpzU313K7IbtnQOkoyjO boYVFh9B9ofNuS2k8MiV8NW0s0PGFzCnNg8XZDHUXpMI6U2wJrN/qeVqWGK6vXS4HDZMVS0W k7Ch8H3+G+wm8Cr4f9cDAIzAjUvildEc76fiznrzCiWfpIr2joxXmsHC5+n53fm1Dnx7GdEG WAbIVohbgjJCJaQimU9RtgHI4DJXcYGHLlQijlKknOfU8WHqpDiObwNrGULmJr6wbDxEwkYr ErnTHJfAqf+6GOPkrgGi/Iryn/FFG046PxudL0/rLtzq6jzYGtB9QLrRd9CVstdPZJ/SDJRp wrDvhp02f8MavXZ5ntJwsfpEWqNme2oIjDRQhyKLWj2PeUqJ9Amf9EDt5Je8QKxXrw2Plw7t knirGj2J+aPHqxt0VHF9kCnZauOmfwxZ2qbUqw5L38kIPkbhtwVX84o/uWsjrDgDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrPLMWRmVeSWpSXmKPExsVy+t/xu7qJk7tjDTbt1LfYOGM9q8X1L89Z LeYfOcdq0f/4NbPF+fMb2C3ONr1ht7jVIGOx6fE1VovLu+awWXzuPcJoMeP8PiaLtUfuslss vX6RyeJ24wo2i9a9R9gtDr9pZ7X4duIRo4Ogx5p5axg9ds66y+6xaVUnm8fmJfUeB9/tYfLo 27KK0ePzJrkA9ig9m6L80pJUhYz84hJbpWhDCyM9Q0sLPSMTSz1DY/NYKyNTJX07m5TUnMyy 1CJ9uwS9jFV7J7EXnOGq+HbwDXMD41uOLkYODgkBE4nJZ127GLk4hASWMkpcaV/A1MXICRQX k5i0bzs7hC0s8edaFxtE0SdGict3u1hBmtkE9CR2rCoEiYsILGeUOLbqLTOIwyxwhEni6Opr jCDdwgL6Es3XG5lBbBYBVYk1P3eBbeAVsJfoOdEAtU1eYvWGA8wTGHkWMDKsYhRJLS3OTc8t NtQrTswtLs1L10vOz93ECAz8bcd+bt7BeGlj8CFGAQ5GJR7eA2HdsUKsiWXFlbmHGCU4mJVE eGfJdMUK8aYkVlalFuXHF5XmpBYfYjQFWj6RWUo0OR8YlXkl8YamhuYWlobmxubGZhZK4rwd AgdjhATSE0tSs1NTC1KLYPqYODilGhjnWl4QdPk9Y5GnzJQFxk+laq8efT1v6d239q3izlW1 U/RzOdb/j7kRbnvcNUDv+40HEyIDfIoUrSQ7o/Krlq06MmkSl0Fd2yu9gP881fb7VE+w9H78 khfWYdTqt3W6ef3UtjgJphMLb38pCfW/HGaxW09T1VogwFB/j1nvntzit/t9Qjdf81JiKc5I NNRiLipOBAC8i8PpkgIAAA== X-CMS-MailID: 20190925161841eucas1p12b3b798020b3493e9a4804d98b422f17 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20190925161841eucas1p12b3b798020b3493e9a4804d98b422f17 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20190925161841eucas1p12b3b798020b3493e9a4804d98b422f17 References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, This is a patch set for the Exynos5 Dynamic Memory Controller driver which could be found in Krzysztof's tree [1]. It is on top of a merge of the two branches [1][2]. It adds interrupt mode which does not relay on devfreq polling. Instead of checking the device state by the framework, driver uses local performance events counters which could trigger interrupt when overflow. Thanks to this approach the driver avoids issues present in devfreq framework, when default polling check does not occur. The algorithm calculates 'busy_time' and 'total_time' needed for devfreq governors (simple_ondemand) based on requests transactions traffic. Regards, Lukasz Luba [1] https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git/log/?h=for-v5.4-5.5/memory-samsung-dmc [2] https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git/log/?h=for-v5.4-5.5/memory-samsung-dmc-dt Lukasz Luba (3): ARM: dts: exynos: Add interrupt to DMC controller in Exynos5422 ARM: dts: exynos: map 0x10000 SFR instead of 0x100 in DMC Exynos5422 memory: samsung: exynos5422-dmc: Add support for interrupt from performance counters arch/arm/boot/dts/exynos5420.dtsi | 4 +- drivers/memory/samsung/exynos5422-dmc.c | 297 ++++++++++++++++++++++-- 2 files changed, 275 insertions(+), 26 deletions(-) -- 2.17.1