From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Elder Subject: [PATCH v4 RESEND 0/5] ARM: SMP: support Broadcom mobile SoCs Date: Fri, 30 May 2014 17:28:51 -0500 Message-ID: <1401488936-21186-1-git-send-email-elder@linaro.org> Return-path: Sender: linux-doc-owner@vger.kernel.org To: mporter@linaro.org, bcm@fixthebug.org, linux@arm.linux.org.uk, devicetree@vger.kernel.org, arnd@arndb.de, sboyd@codeaurora.org Cc: bcm-kernel-feedback-list@broadcom.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, galak@codeaurora.org, ijc+devicetree@hellion.org.uk, jason@lakedaemon.net, lorenzo.pieralisi@arm.com, mark.rutland@arm.com, pawel.moll@arm.com, rdunlap@infradead.org, rjui@broadcom.com, robh+dt@kernel.org, rvaswani@codeaurora.org List-Id: devicetree@vger.kernel.org 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