1
Commit Graph

176 Commits

Author SHA1 Message Date
Linus Walleij
fe67dfc874 mach-ux500: configure board for the TPS61052 regulator v2
This registers the TPS61052 regulator to the ux500 MOP/HREF boards.

Cc: Samuel Ortiz <samuel.ortiz@intel.com>
Cc: Liam Girdwood <lrg@slimlogic.co.uk>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Ola Lilja <ola.o.lilja@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-28 08:54:23 +02:00
Bengt Jonsson
dfa3a824de mach-ux500: provide ab8500 init vector
This adds an ab8500 regulator initialization vector for the
HREF/MOP500 series of boards. This also sets the display
regulator to be on at boot so we don't loose our splash
screen when the board comes up.

Signed-off-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-28 08:47:19 +02:00
Bibek Basu
3ef374a22b mach-ux500: board support for AB8500 GPIO driver
This is the board support patch for ab8500 gpio driver
on mach-ux500.Patch implements 16 virtual
IRQ mapped to 16 interrupt capable AB8500 GPIOs.

Signed-off-by: Bibek Basu <bibek.basu@stericsson.com>
[Modify for header file placement]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-28 08:47:18 +02:00
Bengt Jonsson
79568b9412 regulator: initialization for ab8500 regulators
The regulators on the AB8500 have a lot of custom
hardware control settings pertaining to 8 external
signals, settings which are board-specific and need
be provided from the platform at startup.

Initialization added for regulators Vana, VextSupply1,
VextSupply2, VextSupply3, Vaux1, Vaux2, Vaux3, VTVout,
Vintcore12, Vaudio, Vdmic, Vamic1, Vamic2, VrefDDR.

Signed-off-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Reviewed-by: Rickard Andersson <rickard.andersson@stericsson.com>
Reviewed-by: Jonas Aberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-03-26 14:15:05 +00:00
Linus Torvalds
2f284c8463 Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (35 commits)
  ARM: Update (and cut down) mach-types
  ARM: 6771/1: vexpress: add support for multiple core tiles
  ARM: 6797/1: hw_breakpoint: Fix newlines in WARNings
  ARM: 6751/1: vexpress: select applicable errata workarounds in Kconfig
  ARM: 6753/1: omap4: Enable ARM local timers with OMAP4430 es1.0 exception
  ARM: 6759/1: smp: Select local timers vs broadcast timer support runtime
  ARM: pgtable: add pud-level code
  ARM: 6673/1: LPAE: use phys_addr_t instead of unsigned long for start of membanks
  ARM: Use long long format when printing meminfo physical addresses
  ARM: integrator: add Integrator/CP sched_clock support
  ARM: realview/vexpress: consolidate SMP bringup code
  ARM: realview/vexpress: consolidate localtimer support
  ARM: integrator/versatile: consolidate FPGA IRQ handling code
  ARM: rationalize versatile family Kconfig/Makefile
  ARM: realview: remove old AMBA device DMA definitions
  ARM: versatile: remove old AMBA device DMA definitions
  ARM: vexpress: use new init_early for clock tree and sched_clock init
  ARM: realview: use new init_early for clock tree and sched_clock init
  ARM: versatile: use new init_early for clock tree and sched_clock init
  ARM: integrator: use new init_early for clock tree init
  ...
2011-03-23 20:37:26 -07:00
Russell King
196f020fbb Merge branches 'fixes', 'pgt-next' and 'versatile' into devel 2011-03-20 09:32:12 +00:00
Linus Torvalds
e16b396ce3 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (47 commits)
  doc: CONFIG_UNEVICTABLE_LRU doesn't exist anymore
  Update cpuset info & webiste for cgroups
  dcdbas: force SMI to happen when expected
  arch/arm/Kconfig: remove one to many l's in the word.
  asm-generic/user.h: Fix spelling in comment
  drm: fix printk typo 'sracth'
  Remove one to many n's in a word
  Documentation/filesystems/romfs.txt: fixing link to genromfs
  drivers:scsi Change printk typo initate -> initiate
  serial, pch uart: Remove duplicate inclusion of linux/pci.h header
  fs/eventpoll.c: fix spelling
  mm: Fix out-of-date comments which refers non-existent functions
  drm: Fix printk typo 'failled'
  coh901318.c: Change initate to initiate.
  mbox-db5500.c Change initate to initiate.
  edac: correct i82975x error-info reported
  edac: correct i82975x mci initialisation
  edac: correct commented info
  fs: update comments to point correct document
  target: remove duplicate include of target/target_core_device.h from drivers/target/target_core_hba.c
  ...

Trivial conflict in fs/eventpoll.c (spelling vs addition)
2011-03-18 10:37:40 -07:00
Linus Torvalds
411f5c7a50 Merge branch 'devel-stable' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel-stable' of master.kernel.org:/home/rmk/linux-2.6-arm: (289 commits)
  davinci: DM644x EVM: register MUSB device earlier
  davinci: add spi devices on tnetv107x evm
  davinci: add ssp config for tnetv107x evm board
  davinci: add tnetv107x ssp platform device
  spi: add ti-ssp spi master driver
  mfd: add driver for sequencer serial port
  ARM: EXYNOS4: Implement Clock gating for System MMU
  ARM: EXYNOS4: Enhancement of System MMU driver
  ARM: EXYNOS4: Add support for gpio interrupts
  ARM: S5P: Add function to register gpio interrupt bank data
  ARM: S5P: Cleanup S5P gpio interrupt code
  ARM: EXYNOS4: Add missing GPYx banks
  ARM: S3C64XX: Fix section mismatch from cpufreq init
  ARM: EXYNOS4: Add keypad device to the SMDKV310
  ARM: EXYNOS4: Update clocks for keypad
  ARM: EXYNOS4: Update keypad base address
  ARM: EXYNOS4: Add keypad device helpers
  ARM: EXYNOS4: Add support for SATA on ARMLEX4210
  plat-nomadik: make GPIO interrupts work with cpuidle ApSleep
  mach-u300: define a dummy filter function for coh901318
  ...

Fix up various conflicts in
 - arch/arm/mach-exynos4/cpufreq.c
 - arch/arm/mach-mxs/gpio.c
 - drivers/net/Kconfig
 - drivers/tty/serial/Kconfig
 - drivers/tty/serial/Makefile
 - drivers/usb/gadget/fsl_mxc_udc.c
 - drivers/video/Kconfig
2011-03-17 19:08:06 -07:00
Russell King
05e3475451 Merge branch 'p2v' into devel
Conflicts:
	arch/arm/kernel/module.c
	arch/arm/mach-s5pv210/sleep.S
2011-03-16 23:35:27 +00:00
Linus Walleij
4b4f757c80 mach-ux500: basic HREFv60 support v2
The HREFv60 variant of the MOP500 family of boards remove the
external GPIO expander and route these pins back to some of the
readily available internal GPIO pins instead.

Based on a patch by Bibek Basu <bibek.basu@stericsson.com> for
an internal kernel version.

Cc: Bibek Basu <bibek.basu@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:16 +01:00
Bibek Basu
4bc3a698c3 mach-ux500: add hrefv60 GPIO pins
This will centralize all GPIO pin muxing for the different boards
in the MOP500 family to a single file. It also kills off the
deprecated support for the ED (Early Drop) ASIC, this should
never be spotted in the open and ST-Ericsson have internally
deprecated this hardware.

Signed-off-by: Bibek Basu <bibek.basu@stericsson.com>
[Rebasing and kill old ASIC support]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:16 +01:00
Rabin Vincent
fe05203b0c mach-ux500: move MOP500 pins to separate file
Split off pin definitions for the MOP500 board family to its
own file.

Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:16 +01:00
Rabin Vincent
e493e06fed plat-nomadik: support varying number of GPIOs per block
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
[Added constant 32-pin assignment in platform data]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:14 +01:00
Linus Walleij
5d7b8467e1 mach-ux500: config Ux500 PL011 PL022 PL180 for DMA
This will configure the platform data for the PL011, PL022
and PL180 (derivate) PrimeCells found in the Ux500 to use DMA
with the generic DMA engine for DMA40.

Signed-off-by: Per Forlin <per.forlin@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:14 +01:00
Mian Yousaf Kaukab
741caea4e5 mach-ux500: add MUSB to db5500 devices
- DMA tx and rx maps for usb channels are set to be configured at
  runtime
- MUSB is enabled with soc specific base address, irq and dma
  configurations

Signed-off-by: Mian Yousaf Kaukab <mian-yousaf.kaukab@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:12 +01:00
Mian Yousaf Kaukab
6f3f3c3f0b mach-ux500: add MUSB to db8500 devices
- DMA tx and rx maps for usb channels are set to be configured at
  runtime
- GPIO configurations for usb are added
- MUSB is enabled with soc specific base address, irq and dma
  configurations

Signed-off-by: Mian Yousaf Kaukab <mian-yousaf.kaukab@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:12 +01:00
Mian Yousaf Kaukab
7f0709efe6 mach-ux500: update MUSB clock configurations
MUSB driver has been updated to separate out BSP layer
from its generic parts, as separate driver. This patch
configures the clock with the new platform driver name.

Signed-off-by: Mian Yousaf Kaukab <mian-yousaf.kaukab@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:12 +01:00
Mian Yousaf Kaukab
07f201d8a3 mach-ux500: add platform data for musb
USB resources and DMA40 configurations are dynamically with
the data provided in ux500_add_usb() call. Though only DMA40
configurations differ between U8500 and U5500 (USB resource
are common between them).

Signed-off-by: Mian Yousaf Kaukab <mian-yousaf.kaukab@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:11 +01:00
Philippe Langlais
7863513efc mach-ux500: fix inverted SD-card GPIO pin
The levelshifter pins were set to inverted values, fix this up.

Signed-off-by: Philippe Langlais <philippe.langlais@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:11 +01:00
Philippe Langlais
fbdc6d11ae mach-ux500: set sd/mmc clock rate to 100MHz
The clock speed for the SD/MMC clock was incorrect, rectify it.

Signed-off-by: Philippe Langlais <philippe.langlais@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:11 +01:00
Lee Jones
bb3b218756 mach-ux500: Add Rohm BH1780GLI Light Sensor to i2c_board_info
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:11 +01:00
Philippe Langlais
dd7b2a0556 mach-ux500: platform data for LP5521 leds driver
Signed-off-by: Philippe Langlais <philippe.langlais@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:11 +01:00
Philippe Langlais
a71b819b6e mach-ux500: platform data for SFH7741 proximity sensor driver
Proximity sensor is managed as an input event (SW_PROXIMITY).

Signed-off-by: Philippe Langlais <philippe.langlais@linaro.org>
[Named GPIO pin]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:11 +01:00
Linus Walleij
b3f1f73d35 mach-ux500: delete old keypad board file
We register keypads per-UIB now, remove this.

Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:11 +01:00
Sundar Iyer
71f933f4ef mach-ux500: add U8500 UIB platform data
The U8500 UIB contains a Synaptics RMI touchpanel and
a matrix keyboard via the TC35893 port expander device.

Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:10 +01:00
Sundar Iyer
0c24352ead mach-ux500: add ST-UIB platform data
The ST-UIB contains a matrix keypad interfaced with the
STMPE1601 port expander and a ROHM BU2101 touch panel.

Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:10 +01:00
Rabin Vincent
705e098444 mach-ux500: dynamic UIB (user interface boards) detection
Add support for dynamic detection of the UIB used (at the cost of one i2c error
on the lesser-used UIB) and also provide an override via a command line
parameter if needed.

Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:10 +01:00
Sundar Iyer
871056e7df mach-ux500: fix ux500 build error
Include ab8500 regulators for DB8500 SoC by default
and fix build issues

Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
[Small fixup for changed boardfiles]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:09 +01:00
Linus Walleij
d1de85a231 mach-ux500: add a few AB8500 regulator consumers v3
Try to make the regulators a little bit more useful by adding some
of the most basic consumers we're going to have in the end.

Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Rabin Vincent <rabin@rab.in>
Cc: Naveen Kumar Gaddipati <naveen.gaddipati@stericsson.com>
Cc: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:08 +01:00
Linus Walleij
df93f1f4ee mach-ux500: add DB5500 PMU resources
This adds the PMU resources necessary to get perf working with
the DB5500 ASIC.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-03-14 14:05:06 +01:00
Linus Walleij
6e266b204b ARM: 6776/1: mach-ux500: activate fix for errata 753970
This applies errata fix 753970 for all ux500 platforms. All
current ASICs suffer from this. If the problem is resolved in
later ASICs, the errata selection can be pushed down to other
Kconfig options.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-03-09 21:38:03 +00:00
Santosh Shilimkar
af90f10d38 ARM: 6759/1: smp: Select local timers vs broadcast timer support runtime
The current code support of dummy timers in absence of local
timer is compile time. This is an attempt to convert it to runtime
so that on few SOC version if the local timers aren't supported
kernel can switch to dummy timers. OMAP4430 ES1.0 does suffer from
this limitation.

This patch should not have any functional impact on affected
files.

Cc: Daniel Walker <dwalker@codeaurora.org>
Cc: Bryan Huntsman <bryanh@codeaurora.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Colin Cross <ccross@android.com>
Cc: Erik Gilling <konkers@android.com>
Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-23 17:54:27 +00:00
Russell King
f4117ac9e2 ARM: P2V: separate PHYS_OFFSET from platform definitions
This uncouple PHYS_OFFSET from the platform definitions, thereby
facilitating run-time computation of the physical memory offset.

Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Magnus Damm <damm@opensource.se>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Wan ZongShun <mcuos.com@gmail.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Acked-by: Jiandong Zheng <jdzheng@broadcom.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-17 23:26:55 +00:00
Justin P. Mattock
74ab0030b5 mbox-db5500.c Change initate to initiate.
Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-02-17 16:49:54 +01:00
Rabin Vincent
aa90eb9d9d mach-ux500: DB8500 PMU support
DB8500 has irqs from two cores ORed into one. Implement a
workaround to handle this by bouncing the interrupt by setting
the affinity to the other core when the interrupt appears to
be spurious on the current core.

Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-02-17 13:56:12 +01:00
Bengt Jonsson
a1e516e3a5 mach-ux500: Updated and connected ab8500 regulator board configuration
The ab8500 regulator board configuration is updated and put in an
array which can easily be used in the MFD board configuration. The
regulator board configuration is also added to the MFD
configuration in this patch.

Signed-off-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-01-12 14:33:03 +00:00
Rabin Vincent
d2a40972ec ux500: allow 5500 and 8500 to be built together
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
2011-01-10 18:34:54 +01:00
Rabin Vincent
5ec65521c9 ux500: modem_irq is only for 5500
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
[Modified to hit the right file]
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
2011-01-10 18:34:53 +01:00
Rabin Vincent
abf12d719a ux500: dynamic SOC detection
Dynamically detect the DBx500 SOC an revision based on the ASIC ID.

Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
2011-01-10 18:34:53 +01:00
Rabin Vincent
5dc55e0a39 ux500: rename MOP board Kconfig
Rename the MOP board Kconfig entries to the same name as the machine
type, so that the machine_is_*() macros work correctly.

Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
[Updated to match changes in the tree]
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
2011-01-10 18:34:53 +01:00
Rabin Vincent
92389ca836 ux500: remove build-time changing macros
To allow the possiblity of building U8500 and U5500 support in the same
image.

Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
[Rebased to latest changes in Russells tree]
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
2011-01-10 18:34:52 +01:00
Russell King
404a02cbd2 Merge branch 'devel-stable' into devel
Conflicts:
	arch/arm/mach-pxa/clock.c
	arch/arm/mach-pxa/clock.h
2011-01-06 22:33:32 +00:00
Russell King
4073723acb Merge branch 'misc' into devel
Conflicts:
	arch/arm/Kconfig
	arch/arm/common/Makefile
	arch/arm/kernel/Makefile
	arch/arm/kernel/smp.c
2011-01-06 22:32:52 +00:00
Russell King
4ec3eb1363 Merge branch 'smp' into misc
Conflicts:
	arch/arm/kernel/entry-armv.S
	arch/arm/mm/ioremap.c
2011-01-06 22:32:03 +00:00
Sundar Iyer
60ebe1568f ux500: add TC35893 keypad platform data
Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
2010-12-29 22:07:05 +01:00
Srinidhi Kasagar
78368c7994 ARM: 6539/1: ux500: remove unnecessary barrier from the secondary startup
Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-24 09:50:26 +00:00
Linus Walleij
11c8ea81cc ux500: rename modem IRQ and MBOX files
Suffix the U5500 modem IRQ and MBOX files with *-db5500* so that
we clearly know the SoC they belong to, in line with the rest of
the files in mach-ux500.

Cc: Stefan Nilsson <stefan.xk.nilsson@stericsson.com>
Cc: Martin Persson <martin.persson@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
2010-12-22 09:26:49 +01:00
Russell King
3705ff6da5 ARM: Fix subtle race in CPU pen_release hotplug code
There is a subtle race in the CPU hotplug code, where a CPU which has
been offlined can online itself before being requested, which results
in things going astray on the next online/offline cycle.

What happens in the normal online/offline/online cycle is:

	CPU0			CPU3
	requests boot of CPU3
	pen_release = 3
	flush cache line
				checks pen_release, reads 3
				starts boot
				pen_release = -1
	... requests CPU3 offline ...
				... dies ...
				checks pen_release, reads -1
	requests boot of CPU3
	pen_release = 3
	flush cache line
				checks pen_release, reads 3
				starts boot
				pen_release = -1

However, as the write of -1 of pen_release is not fully flushed back to
memory, and the checking of pen_release is done with caches disabled,
this allows CPU3 the opportunity to read the old value of pen_release:

	CPU0			CPU3
	requests boot of CPU3
	pen_release = 3
	flush cache line
				checks pen_release, reads 3
				starts boot
				pen_release = -1
	... requests CPU3 offline ...
				... dies ...
				checks pen_release, reads 3
				starts boot
				pen_release = -1
	requests boot of CPU3
	pen_release = 3
	flush cache line

Fix this by grouping the write of pen_release along with its cache line
flushing code to ensure that any update to pen_release is always pushed
out to physical memory.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-20 15:09:13 +00:00
Russell King
86e62b9336 ARM: SMP: remove smp_mpidr.h
With "ARM: CPU hotplug: remove bug checks in platform_cpu_die()", we
now do not use hard_smp_processor_id(), we no longer need to read the
hardware processor ID.  Remove the include providing this function.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-20 15:09:11 +00:00
Russell King
bbc81fd432 ARM: CPU hotplug: remove bug checks in platform_cpu_die()
platform_cpu_die() is entered from the CPU's own idle thread, which
can not be migrated to other CPUs.  Moreover, the 'cpu' argument
comes from the thread info, which will always be the 'current'
CPU.  So remove this useless bug check.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-20 15:09:10 +00:00