linux-kernel - [PATCH v2 0/4] Hot plug support for the Armada 38x SoCs

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Message-Id: <1414669184-16785-1-git-send-email-gregory.clement@free-electrons.com>
Date:	Thu, 30 Oct 2014 12:39:40 +0100
From:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:	Jason Cooper <jason@...edaemon.net>, Andrew Lunn <andrew@...n.ch>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>
Cc:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org,
	Lior Amsalem <alior@...vell.com>,
	Tawfik Bayouk <tawfik@...vell.com>,
	Nadav Haklai <nadavh@...vell.com>, linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/4] Hot plug support for the Armada 38x SoCs

Hi,

This patch set is the second version of the series adding the hot plug
and also kexec support for the Armada 38x Socs.

If nobody object we could push them in linux-next.

The first patch was done in order to have the same code between Armada
XP and the Cortex A9 based mvebu SoCs. In order to ensure the the
backward compatibility for the device tree, it is only a preliminary
work for it.

The second patch moves the SCU power up sequence in a dedicated
assembly function. It was done in order to reuse it in the 3rd patch.

The third patch fixes the secondary startup for the cortex A9 mvebu
SoC. Indeed, the initial code was written with the assumption the SCU
will be always power on, which is not only true especially in the
kexec case.

These 2 patches may worth to be pushed to the stable kernel.

Then the last patch adds the CPU hotplug support for Armada 38x. I
tested the hotplug using the /sys/devices/system/cpu/cpu1/online
virtual file.  I also tested the kexec feature and managed to switch
to a new kernel using kexec.

Thanks,

Gregory

Changelog:

v1 -> v2:

- Fix typo and improve the comment explaining why we need to keep the
  .smp filed in the 1st patch.

- Add a prefix to the function power_up_scu function to keep it
  private and not "pollute" the global namespace.

Gregory CLEMENT (4):
  ARM: mvebu: Clean-up the Armada XP support
  ARM: mvebu: Move SCU power up in a function
  ARM: mvebu: Fix the secondary startup for Cortex A9 SoC
  ARM: mvebu: Implement the CPU hotplug support for the Armada 38x SoCs

 arch/arm/mach-mvebu/armada-370-xp.h |  6 -----
 arch/arm/mach-mvebu/board-v7.c      |  5 ++++
 arch/arm/mach-mvebu/coherency.c     |  1 -
 arch/arm/mach-mvebu/cpu-reset.c     |  1 -
 arch/arm/mach-mvebu/headsmp-a9.S    |  1 +
 arch/arm/mach-mvebu/platsmp-a9.c    | 53 +++++++++++++++++++++++++++++++++++--
 arch/arm/mach-mvebu/platsmp.c       |  2 ++
 arch/arm/mach-mvebu/pmsu.c          |  3 +--
 arch/arm/mach-mvebu/pmsu.h          |  2 ++
 arch/arm/mach-mvebu/pmsu_ll.S       | 20 +++++++++-----
 10 files changed, 75 insertions(+), 19 deletions(-)

-- 
1.9.1

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