From mboxrd@z Thu Jan 1 00:00:00 1970 From: 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> References: Content-Type: text/plain; charset="utf-8" Return-path: Sender: linux-kernel-owner@vger.kernel.org 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 List-Id: devicetree@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