| Message ID | 20190215125229.30180-1-m.szyprowski@samsung.com |
|---|---|
| Headers | show |
| Series | Exynos SoCs: enable support for ARM Architected Timers | expand |
Hi Marek, I will pick patch 1 and 2 for 5.1 Thanks -- Daniel On 15/02/2019 13:52, Marek Szyprowski wrote: > Dear All, > > ARM Architected Timers are present in all CortexA7/A15 based Samsung > Exynos SoCs. So far they were not enabled, because there were some issues > related to their initialization. Samsung Exynos SoCs used custom timer > hardware - Exynos MultiCore Timer. It turned out that enabling MCT it is > also needed to get ARM Architected Timers working, because they both > share some common hardware blocks (global system counter). > > This patchset enables support for ARM Architected Timer driver together > with a standard Exynos MultiCore Timer driver, which is kept as a default > timer source on ARM 32bit platforms. Support for ARM architected timers > is essential for enabling proper KVM support on those platforms. > > Some of the MCT cleanup patches were earlier a part of the similar > patchset for ARM64-based Exynos5433 SoC. > > Best regards > Marek Szyprowski > Samsung R&D Institute Poland > > Marek Szyprowski (5): > clocksource: exynos_mct: Remove dead code > clocksource: exynos_mct: Fix error path in timer resources > initialization > clocksource: exynos_mct: Increase priority over ARM arch timer > ARM: dts: exynos: Add support ARM architected timers > ARM: exynos: Enable support for ARM architected timers > > arch/arm/boot/dts/exynos3250.dtsi | 10 ++++++++++ > arch/arm/boot/dts/exynos5250.dtsi | 1 + > arch/arm/boot/dts/exynos54xx.dtsi | 10 ++++++++++ > arch/arm/mach-exynos/Kconfig | 1 + > drivers/clocksource/exynos_mct.c | 27 +++++++++++++++++---------- > include/linux/cpuhotplug.h | 2 +- > 6 files changed, 40 insertions(+), 11 deletions(-) > -- <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook | <http://twitter.com/#!/linaroorg> Twitter | <http://www.linaro.org/linaro-blog/> Blog
Dear All, ARM Architected Timers are present in all CortexA7/A15 based Samsung Exynos SoCs. So far they were not enabled, because there were some issues related to their initialization. Samsung Exynos SoCs used custom timer hardware - Exynos MultiCore Timer. It turned out that enabling MCT it is also needed to get ARM Architected Timers working, because they both share some common hardware blocks (global system counter). This patchset enables support for ARM Architected Timer driver together with a standard Exynos MultiCore Timer driver, which is kept as a default timer source on ARM 32bit platforms. Support for ARM architected timers is essential for enabling proper KVM support on those platforms. Some of the MCT cleanup patches were earlier a part of the similar patchset for ARM64-based Exynos5433 SoC. Best regards Marek Szyprowski Samsung R&D Institute Poland Marek Szyprowski (5): clocksource: exynos_mct: Remove dead code clocksource: exynos_mct: Fix error path in timer resources initialization clocksource: exynos_mct: Increase priority over ARM arch timer ARM: dts: exynos: Add support ARM architected timers ARM: exynos: Enable support for ARM architected timers arch/arm/boot/dts/exynos3250.dtsi | 10 ++++++++++ arch/arm/boot/dts/exynos5250.dtsi | 1 + arch/arm/boot/dts/exynos54xx.dtsi | 10 ++++++++++ arch/arm/mach-exynos/Kconfig | 1 + drivers/clocksource/exynos_mct.c | 27 +++++++++++++++++---------- include/linux/cpuhotplug.h | 2 +- 6 files changed, 40 insertions(+), 11 deletions(-) -- 2.17.1