linux-kernel - [PATCH v2 0/5] arm: mvebu: add support for local timer for Armada 370/XP

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Date:	Fri, 25 Jan 2013 18:32:40 +0100
From:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:	Jason Cooper <jason@...edaemon.net>, Andrew Lunn <andrew@...n.ch>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	John Stultz <johnstul@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Russell King <linux@....linux.org.uk>
Cc:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org,
	devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
	Nicolas Pitre <nico@...xnic.net>,
	Lior Amsalem <alior@...vell.com>,
	Maen Suleiman <maen@...vell.com>,
	Tawfik Bayouk <tawfik@...vell.com>,
	Shadi Ammouri <shadi@...vell.com>,
	Eran Ben-Avi <benavi@...vell.com>,
	Yehuda Yitschak <yehuday@...vell.com>,
	Nadav Haklai <nadavh@...vell.com>,
	Ike Pan <ike.pan@...onical.com>,
	Jani Monoses <jani.monoses@...onical.com>,
	Chris Van Hoof <vanhoof@...onical.com>,
	Dan Frazier <dann.frazier@...onical.com>,
	Leif Lindholm <leif.lindholm@....com>,
	Jon Masters <jcm@...hat.com>,
	David Marlin <dmarlin@...hat.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Subject: [PATCH v2 0/5] arm: mvebu: add support for local timer for Armada 370/XP

Hello,

The Armada XP SoCs comes with private timers. This allows us to use
local timers through CONFIG_LOCAL_TIMERS and as stated in the kconfig
help, it prevents a "thundering herd" at every timer tick.

Armada 370 also have these private timers, and even if it comes only
with a single CPU, the feature is also enabled for this SoC to keep
the code generic.

In order to be able to use the local timer, I also had to add the
support for the per-CPU interrupts.

There are not many changes since the first version (see the changelog
below), I hope it means that everybody is happy with this patch
set. If it is, so please could you give your acked-by. I especially
expect the acked-by from John Stultz then I will feel more comfortable
to ask Jason to pull it.

This patch set is based on 3.8-rc4 and is obviously 3.9 material. The
git branch called local_timer is available at:
https://github.com/MISL-EBU-System-SW/mainline-public.git.

Thanks,

Changelog:
V1->V2:
 - Fixed unneeded empty line and wrong indentation.
 - Made percpu_armada_370_xp_evt a static variable
 - Removed the patch "arm: kconfig: don't select TWD with local timer
   for Armada 370/XP" from the series. There is still some improvement
   possible in this area, but this patch set not depends on it.

Gregory CLEMENT (5):
  arm: mvebu: Add support for local interrupt
  clocksource: time-armada-370-xp: add local timer support
  arm: mvebu: update defconfig with local timer support
  arm: mvebu: update DT to support local timers
  clocksource: update and move armada-370-xp-timer documentation to
    timer directory

 .../bindings/arm/armada-370-xp-timer.txt           |   12 --
 .../bindings/timer/marvell,armada-370-xp-timer.txt |   15 ++
 arch/arm/boot/dts/armada-370-xp.dtsi               |    5 +-
 arch/arm/configs/mvebu_defconfig                   |    1 -
 arch/arm/mach-mvebu/irq-armada-370-xp.c            |   15 +-
 drivers/clocksource/time-armada-370-xp.c           |  150 +++++++++++++++-----
 6 files changed, 141 insertions(+), 57 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/arm/armada-370-xp-timer.txt
 create mode 100644 Documentation/devicetree/bindings/timer/marvell,armada-370-xp-timer.txt

-- 
1.7.9.5

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