linux-kernel - [PATCH v4 RESEND 0/5] ARM: SMP: support Broadcom mobile SoCs

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Date:	Fri, 30 May 2014 17:28:51 -0500
From:	Alex Elder <elder@...aro.org>
To:	mporter@...aro.org, bcm@...thebug.org, linux@....linux.org.uk,
	devicetree@...r.kernel.org, arnd@...db.de, sboyd@...eaurora.org
Cc:	bcm-kernel-feedback-list@...adcom.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org, galak@...eaurora.org,
	ijc+devicetree@...lion.org.uk, jason@...edaemon.net,
	lorenzo.pieralisi@....com, mark.rutland@....com,
	pawel.moll@....com, rdunlap@...radead.org, rjui@...adcom.com,
	robh+dt@...nel.org, rvaswani@...eaurora.org
Subject: [PATCH v4 RESEND 0/5] ARM: SMP: support Broadcom mobile SoCs

This series adds SMP support for two Broadcom mobile SoC families.
It uses CPU_METHOD_OF_DECLARE() so that SMP operations are assigned
using device tree rather than adding it to a machine definition in a
board file.

The enable method starts a secondary core by writing to a register
monitored by CPUs spinning in a ROM-based holding pen loop.  The
address of this register is recorded as a property in the "cpus"
node of the device tree.

					-Alex

Notes:
    - I would prefer to document the binding in a separate file in
      the way suggested here:
        https://lkml.org/lkml/2014/5/20/559
      But for now I'm keeping this independent of that.
    - This series is based on v3.15-rc4, plus one more recently-posted patch:
	https://lkml.org/lkml/2014/4/15/303
    - This series is available here:
	http://git.linaro.org/landing-teams/working/broadcom/kernel.git
	Branch review/bcm-smp-v4

History
v4: - Renamed "platsmp.c" to be "kona_smp.c".
    - Rebased onto v3.15-rc5
v3: - Dropped definition and use of CPU_METHOD_OF_DECLARE_SETUP()
    - Added documentation for "enable-method"
    - Rebased onto v3.15-rc4
v2: - Fixed a Makefile error (:= should have been +=)
    - No longer set CONFIG_NR_CPUS in bcm_defconfig
    - Rebased onto v3.15-rc1

Alex Elder (5):
  devicetree: bindings: document Broadcom CPU enable method
  ARM: add SMP support for Broadcom mobile SoCs
  ARM: configs: enable SMP in bcm_defconfig
  ARM: dts: enable SMP support for bcm28155
  ARM: dts: enable SMP support for bcm21664

 Documentation/devicetree/bindings/arm/cpus.txt |  12 ++
 arch/arm/boot/dts/bcm11351.dtsi                |  19 +++
 arch/arm/boot/dts/bcm21664.dtsi                |  19 +++
 arch/arm/configs/bcm_defconfig                 |   1 +
 arch/arm/mach-bcm/Kconfig                      |  18 ++-
 arch/arm/mach-bcm/Makefile                     |   3 +
 arch/arm/mach-bcm/kona_smp.c                   | 202 +++++++++++++++++++++++++
 7 files changed, 271 insertions(+), 3 deletions(-)
 create mode 100644 arch/arm/mach-bcm/kona_smp.c

-- 
1.9.1

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