linux-kernel - Re: [PATCH v3 0/3] Exynos MCT udelay, MCT cleanup, MCT to 32-bits

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Message-ID: <53B72025.5030902@samsung.com>
Date:	Sat, 05 Jul 2014 06:44:05 +0900
From:	Kukjin Kim <kgene.kim@...sung.com>
To:	Doug Anderson <dianders@...omium.org>
CC:	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Tomasz Figa <t.figa@...sung.com>,
	linux-samsung-soc@...r.kernel.org,
	David Riley <davidriley@...omium.org>,
	Chirantan Ekbote <chirantan@...omium.org>,
	linux-kernel@...r.kernel.org,
	Amit Daniel Kachhap <amit.daniel@...sung.com>,
	olof@...om.net, Vincent Guittot <vincent.guittot@...aro.org>,
	tglx@...utronix.de, javier.martinez@...labora.co.uk,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 0/3] Exynos MCT udelay, MCT cleanup, MCT to 32-bits

On 06/21/14 02:47, Doug Anderson wrote:
> This is a series of 3 patches related to the exynos MCT (multi core
> timer).  The first allows MCT to function as a udelay() timer which
> fixes broken udelay on 5400, 5800, and even (to a lesser extent) on
> 5250.  The second is some general cleanup.  The third moves MCT to
> 32-bits where possible to give us a nice speedup.
>
> The first probably ought to be destined for 3.16 as a bugfix whereas
> the others could land in a future kernel release.
>
> This series is based on (clocksource: exynos_mct: Fix ftrace).
>
> With this series we can drop the patches I submitted:
> - clocksource: exynos_mct: cache mct upper count
> - clocksource: exynos_mct: Optimize register reads with ldmia
>
> Changes in v3:
> - Back to exynos_frc_read for now until 32/64 is resolved.
> - Now returns cycles_t which matches arch/arm/include/asm/timex.h.
> - Rebased.
> - Moved registration to its own function.
> - __raw_readl / __raw_writel patch new for version 3
> - Now 32-bit version instead of ldmia version
>
> Changes in v2:
> - Added #defines for ARM and ARM64 as pointed by Doug Anderson.
>
> Amit Daniel Kachhap (1):
>    clocksource: exynos_mct: Register the timer for stable udelay
>
> Doug Anderson (2):
>    clocksource: exynos_mct: __raw_readl/__raw_writel =>
>      readl_relaxed/writel_relaxed
>    clocksource: exynos_mct: Only use 32-bits where possible
>
>   drivers/clocksource/Kconfig      |  1 +
>   drivers/clocksource/exynos_mct.c | 72 ++++++++++++++++++++++++++++++----------
>   2 files changed, 55 insertions(+), 18 deletions(-)
>

Sorry for late taking this series...looks good to me and applied 
including previous 'fix ftrace'.

Thanks,
Kukjin
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