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Wed, 2 Oct 2019 07:05:04 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p2.samsung.com (KnoxPortal) with ESMTPA id 20191002060503eucas1p25fb14ebbf05a5599f8faeacbd3a15887~Jv1HxvYwO1256612566eucas1p2P; Wed, 2 Oct 2019 06:05:03 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20191002060503eusmtrp11c8829126af2ec5c4aa698c30f229c97~Jv1Hw6rtf2145721457eusmtrp1G; Wed, 2 Oct 2019 06:05:03 +0000 (GMT) X-AuditID: cbfec7f2-54fff70000001175-3f-5d943e108bf9 Received: from eusmtip2.samsung.com ( [203.254.199.222]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 4B.EB.04117.F0E349D5; Wed, 2 Oct 2019 07:05:03 +0100 (BST) Received: from AMDC3778.digital.local (unknown [106.120.51.20]) by eusmtip2.samsung.com (KnoxPortal) with ESMTPA id 20191002060502eusmtip21b4ae8910443ee2f13c9788bef9054df~Jv1G3FiKS3183531835eusmtip2p; Wed, 2 Oct 2019 06:05:02 +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 v3 0/4] Exynos5 DMC interrupt mode Date: Wed, 2 Oct 2019 08:04:51 +0200 Message-Id: <20191002060455.3834-1-l.luba@partner.samsung.com> X-Mailer: git-send-email 2.17.1 X-Brightmail-Tracker: H4sIAAAAAAAAA0WSf0yMcRzHfZ/nnnuejrOvp8aH0HbTVjalZL6b1grj/PjDH+aPEo6epXVX uacfOjYnFDfUQmQpv3K5Urlut6IadZUtukrU2GFOqylNLo0x4/GE/97f9/v1/r7/+XA0X8ks 4lLSMgVjmk6vUaoUzs5vPStwzIXElaVujty7XMeQwakRhlS4ehhS6B2jidtdz5KneeMseWle TOzeFwx5dr9MSXxnXYhcdrdS5K7Lw5LKwT6KvDpWpSQnW1wsaR8vYMj043codp62prwGaZuu eFit3XZaqW24dVT7aKKZ0p5z2JDWZ1+6nY1XRScJ+pRswRges1d1YKr5K5XhVB/6ZC5RmNFn lQX5cYCj4KtjnLEgFcfjKgTHC78r5McUAvODh5RE8diHwG6L/tsoryidgawInCeKlP8a73uH kAVxnBKHQaPtoFQIwDcRTLfHSwyNnRS8tU0zUuCPI6HsdQOStAIHw8VXw6zUVeMYOFerlseC oLr+IS11AdtZyO+fRHKwAXryWxlZ+8OHLgcr68XQff6MQtYimM9en+GPgLfw6gyzFtq7+hhp i8ahUHc/XLbjoONW7R8b8FwY+jhPsunfsth5iZZtNZzK52U6BBxneilZzwdrTcnM51qo7pj8 g/M4EZ73rypCS6/8n7qGkA0tELJEQ7IgRqQJOWGiziBmpSWH7U832NHv4+n+2fW5EX3p39eG MIc0c9RDO84n8owuW8w1tCHgaE2AOvpHcSKvTtLlmgRj+h5jll4Q21Agp9AsUB+e9TaBx8m6 TCFVEDIE49+U4vwWmZHlDTaI/A1Pal6ZdefG+pGikEt3moOGBzT+6Rl1scsuMAN5C0c1wpqS yF0mC7t5tWl5yFj5pq02yjGk8DxZwrZUG6N8y0yRCeHrc+y+wJZ3o52henTMz1QePMJug/qI 21XFW7p7jaGbCipydmdZZnuzJ5zrmuL64w0Z+5usoFGIB3QRy2mjqPsFhJGOdjgDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrPLMWRmVeSWpSXmKPExsVy+t/xe7r8dlNiDbbt1LLYOGM9q8X1L89Z LeYfOcdq0f/4NbPF+fMb2C3ONr1ht7jVIGOx6fE1VovLu+awWXzuPcJoMeP8PiaLtUfuslss vX6RyeJ24wo2i9a9R9gtDr9pZ7X4duIRo4Ogx5p5axg9ds66y+6xaVUnm8fmJfUeB9/tYfLo 27KK0ePzJrkA9ig9m6L80pJUhYz84hJbpWhDCyM9Q0sLPSMTSz1DY/NYKyNTJX07m5TUnMyy 1CJ9uwS9jC97fjAVbOOt+NAwjaWB8RNXFyMnh4SAicS8+TNZuhi5OIQEljJKfPp9hQUiISYx ad92dghbWOLPtS42iKJPjBLrOncxdzFycLAJ6EnsWFUIEhcRWM4ocWzVW2YQh1ngCJPE0dXX GEG6hQWMJObc2wxmswioSky9/ZQdpJlXwE6ibx0vxAJ5idUbDjBPYORZwMiwilEktbQ4Nz23 2EivODG3uDQvXS85P3cTIzDwtx37uWUHY9e74EOMAhyMSjy8DUGTY4VYE8uKK3MPMUpwMCuJ 8Nr8mRQrxJuSWFmVWpQfX1Sak1p8iNEUaPdEZinR5HxgVOaVxBuaGppbWBqaG5sbm1koifN2 CByMERJITyxJzU5NLUgtgulj4uCUamDU1t1cxWsYb7Wla12t74ekXcrByWHBrRG5d38nnas+ efvmou1zhFO9l1TutXj9ccovnom/8hr/95abVbxy+sW26RzD8T0CxsbevL63vppO+3X/fph6 w6E5O6tE436cy4mccuBs0fm5rI+5hG1erPl9M97WQnTyIqcq6/0ehd9+fv7qdGxL7BYLJZbi jERDLeai4kQAjv/6a5ICAAA= X-CMS-MailID: 20191002060503eucas1p25fb14ebbf05a5599f8faeacbd3a15887 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20191002060503eucas1p25fb14ebbf05a5599f8faeacbd3a15887 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20191002060503eucas1p25fb14ebbf05a5599f8faeacbd3a15887 References: Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Hi all, This is a v3 patch set for the Exynos5 Dynamic Memory Controller driver which could be found in Krzysztof's for-next branch [1]. It adds interrupt mode which does not relay on devfreq polling. Instead of checking the device state by the framework, driver uses local performance event 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. Changes: v3: - added information in bindings about interrupt names, since the code is sensitive for it as pointed out by Krzysztof v2: changes suggested by Krzysztof - added interrupt line for the channel 1 - added description for bindings with interrupt lines - fixed fallback path in probe function - added comments, blank lines, removed unneeded dev_dbg() in irq handler Regards, Lukasz Luba [1] https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git/log/?h=for-next Lukasz Luba (4): dt-bindings: memory-controllers: Add Exynos5422 DMC interrupts description 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 .../memory-controllers/exynos5422-dmc.txt | 11 + arch/arm/boot/dts/exynos5420.dtsi | 5 +- drivers/memory/samsung/exynos5422-dmc.c | 345 ++++++++++++++++-- 3 files changed, 335 insertions(+), 26 deletions(-) -- 2.17.1