Re: [RFC PATCH 1/3] clocksource: exynos_mct: allow mct to read counter from coprocessor

2015-07-28 Thread Alexey Klimov
On Tue, Jul 28, 2015 at 9:11 AM, Krzysztof Kozlowski k.kozlow...@samsung.com wrote: On 28.07.2015 06:28, Alexey Klimov wrote: It was discovered that 64-bit mmio MCT counter holds the same value as ARM arch timer 64-bit physical counter. Even more: arch timer and MCT are same underlying

Re: [RFC PATCH 1/3] clocksource: exynos_mct: allow mct to read counter from coprocessor

2015-07-28 Thread Krzysztof Kozlowski
On 28.07.2015 06:28, Alexey Klimov wrote: It was discovered that 64-bit mmio MCT counter holds the same value as ARM arch timer 64-bit physical counter. Even more: arch timer and MCT are same underlying hardware timer. Patch adds code to MCT to allow it to read 64-bit counter from

[RFC PATCH 1/3] clocksource: exynos_mct: allow mct to read counter from coprocessor

2015-07-27 Thread Alexey Klimov
It was discovered that 64-bit mmio MCT counter holds the same value as ARM arch timer 64-bit physical counter. Even more: arch timer and MCT are same underlying hardware timer. Patch adds code to MCT to allow it to read 64-bit counter from coprocessor cp15 registers since it's way more faster