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
