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

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Message-Id: <1403286472-6817-1-git-send-email-dianders@chromium.org>
Date:	Fri, 20 Jun 2014 10:47:49 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Tomasz Figa <t.figa@...sung.com>
Cc:	Vincent Guittot <vincent.guittot@...aro.org>,
	Chirantan Ekbote <chirantan@...omium.org>,
	David Riley <davidriley@...omium.org>, olof@...om.net,
	linux-samsung-soc@...r.kernel.org,
	Amit Daniel Kachhap <amit.daniel@...sung.com>,
	javier.martinez@...labora.co.uk,
	Doug Anderson <dianders@...omium.org>,
	linux-kernel@...r.kernel.org, tglx@...utronix.de,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v3 0/3] Exynos MCT udelay, MCT cleanup, MCT to 32-bits

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(-)

-- 
2.0.0.526.g5318336

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