linux-kernel - [PATCH v2 0/6] This series adds SMP support for the MediaTek MT6580.

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Date:	Fri, 10 Jul 2015 14:04:03 +0800
From:	Scott Shu <scott.shu@...iatek.com>
To:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	Catalin Marinas <catalin.marinas@....com>,
	Heiko Stuebner <heiko@...ech.de>,
	Yingjoe Chen <yingjoe.chen@...iatek.com>,
	Marc Carino <marc.ceeeee@...il.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Radha Mohan Chintakuntla <rchintakuntla@...ium.com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-mediatek@...ts.infradead.org>
CC:	<loda.chou@...iatek.com>, <jades.shih@...iatek.com>,
	<scott.shu@...il.com>, <wsd_upstream@...iatek.com>
Subject: [PATCH v2 0/6] This series adds SMP support for the MediaTek MT6580.

This patchset adds support SMP on MediaTek MT6580 Cortex-A7 quad-core SoC.

This is based on v4.1-rc1 and following patch series:
(1) Yingjoe Chen's "Add SMP bringup support for mt65xx socs" [1]
(2) Mars Cheng's "Add mt6580 basic chip support" [2]
(3) Sascha Hauer's "Mediatek SCPSYS power domain support" [3]

The secondary cores are power off as default on MT6580, this change adds
a new enable-method to turn on power to the cores during booting process.

The System Power Manager (SPM) inside the SCPSYS is for the CPU MTCMOS
power domain control. Please check [3] for more information about SCPSYS.

[1] https://lkml.org/lkml/2015/5/16/33
[2] https://lkml.org/lkml/2015/7/7/122
[3] https://lkml.org/lkml/2015/6/9/172

Change in v2:
1. Rebase to 4.2-rc1
2. Fix using usleep() in atomic context
3. Put a timeout in cpu power on/off sequence
4. Fix some coding style

Scott Shu (6):
  Document: bindings: DT: Add SMP enable method for MT6580     SoC
    platform
  soc: Mediatek: Add SCPSYS CPU power domain driver
  ARM: mediatek: add smp bringup code for MT6580
  ARM: Mediatek: enable GPT6 on boot up to make arch timer     working
    for MT6580
  ARM: dts: mt6580: Add device nodes to the MT6580 dtsi file
  ARM: dts: mt6580: enable basic SMP bringup for MT6580

 Documentation/devicetree/bindings/arm/cpus.txt |   1 +
 arch/arm/boot/dts/mt6580.dtsi                  |  25 +++
 arch/arm/mach-mediatek/Makefile                |   2 +-
 arch/arm/mach-mediatek/generic.h               |  23 +++
 arch/arm/mach-mediatek/hotplug.c               | 267 +++++++++++++++++++++++++
 arch/arm/mach-mediatek/mediatek.c              |   4 +-
 arch/arm/mach-mediatek/platsmp.c               | 139 ++++++++++++-
 7 files changed, 458 insertions(+), 3 deletions(-)
 create mode 100644 arch/arm/mach-mediatek/generic.h
 create mode 100644 arch/arm/mach-mediatek/hotplug.c

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