15 Jul, 2013
1 commit
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The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications. For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out. Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.This removes all the drivers/clocksource and drivers/irqchip uses of
the __cpuinit macros from all C files.[1] https://lkml.org/lkml/2013/5/20/589
Cc: John Stultz
Cc: Thomas Gleixner
Acked-by: Thomas Gleixner
Signed-off-by: Paul Gortmaker
12 Jul, 2013
1 commit
-
…vents into timers/urgent
* New clocksource drivers for ARM SoCs to share
07 Jul, 2013
2 commits
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Pull timer core updates from Thomas Gleixner:
"The timer changes contain:- posix timer code consolidation and fixes for odd corner cases
- sched_clock implementation moved from ARM to core code to avoid
duplication by other architectures- alarm timer updates
- clocksource and clockevents unregistration facilities
- clocksource/events support for new hardware
- precise nanoseconds RTC readout (Xen feature)
- generic support for Xen suspend/resume oddities
- the usual lot of fixes and cleanups all over the place
The parts which touch other areas (ARM/XEN) have been coordinated with
the relevant maintainers. Though this results in an handful of
trivial to solve merge conflicts, which we preferred over nasty cross
tree merge dependencies.The patches which have been committed in the last few days are bug
fixes plus the posix timer lot. The latter was in akpms queue and
next for quite some time; they just got forgotten and Frederic
collected them last minute."* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (59 commits)
hrtimer: Remove unused variable
hrtimers: Move SMP function call to thread context
clocksource: Reselect clocksource when watchdog validated high-res capability
posix-cpu-timers: don't account cpu timer after stopped thread runtime accounting
posix_timers: fix racy timer delta caching on task exit
posix-timers: correctly get dying task time sample in posix_cpu_timer_schedule()
selftests: add basic posix timers selftests
posix_cpu_timers: consolidate expired timers check
posix_cpu_timers: consolidate timer list cleanups
posix_cpu_timer: consolidate expiry time type
tick: Sanitize broadcast control logic
tick: Prevent uncontrolled switch to oneshot mode
tick: Make oneshot broadcast robust vs. CPU offlining
x86: xen: Sync the CMOS RTC as well as the Xen wallclock
x86: xen: Sync the wallclock when the system time is set
timekeeping: Indicate that clock was set in the pvclock gtod notifier
timekeeping: Pass flags instead of multiple bools to timekeeping_update()
xen: Remove clock_was_set() call in the resume path
hrtimers: Support resuming with two or more CPUs online (but stopped)
timer: Fix jiffies wrap behavior of round_jiffies_common()
... -
Pull Metag architecture changes from James Hogan:
- Infrastructure and DT files for TZ1090 SoC (pin control drivers
already merged via pinctrl tree).
- Panic on boot instead of just warning if cache aliasing possible.
- Various SMP/hotplug fixes.
- Various other randconfig/sparse fixes.* tag 'metag-for-v3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag: (24 commits)
metag: move EXPORT_SYMBOL(csum_partial) to metag_ksyms.c
metag: cpu hotplug: route_irq: preserve irq mask
metag: kick: add missing irq_enter/exit to kick_handler()
metag: smp: don't spin waiting for CPU to start
metag: smp: enable irqs after set_cpu_online
metag: use clear_tasks_mm_cpumask()
metag: tz1090: select and instantiate pinctrl-tz1090-pdc
metag: tz1090: select and instantiate pinctrl-tz1090
metag: don't check for cache aliasing on smp cpu boot
metag: panic if cache aliasing possible
metag: *.dts: include using preprocessor
metag: add symlink
metag/.gitignore: Extend the *.dtb pattern to match the dtb.S files
metag/traps: include setup.h for the per_cpu_trap_init declaration
metag/traps: Mark die() as __noreturn to match the declaration.
metag/processor.h: Add missing cpuinfo_op declaration.
metag/setup: Restrict scope for the capabilities variable
metag/mm/cache: Restrict scope for metag_lnkget_probe
metag/asm/irq.h: Declare init_IRQ
metag/kernel/irq.c: Declare root_domain as static
...
04 Jul, 2013
1 commit
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Pull ARM updates from Russell King:
"This contains the usual updates from other people (listed below) and
the usual random muddle of miscellaneous ARM updates which cover some
low priority bug fixes and performance improvements.I've started to put the pull request wording into the merge commits,
which are:- NoMMU stuff:
This includes the following series sent earlier to the list:
- nommu-fixes
- R7 Support
- MPU supportI've left out the ARCH_MULTIPLATFORM/!MMU stuff that Arnd and I
were discussing today until we've reached a conclusion/that's had
some more review.This is rebased (and re-tested) on your devel-stable branch because
otherwise there were going to be conflicts with Uwe's V7M work now
that you've merged that. I've included the fix for limiting MPU to
CPU_V7.- Huge page support
These changes bring both HugeTLB support and Transparent HugePage
(THP) support to ARM. Only long descriptors (LPAE) are supported
in this series.The code has been tested on an Arndale board (Exynos 5250).
- LPAE updates
Please pull these miscellaneous LPAE fixes I've been collecting for
a while now for 3.11. They've been tested and reviewed by quite a
few people, and most of the patches are pretty trivial. -- Will Deacon.- arch_timer cleanups
Please pull these arch_timer cleanups I've been holding onto for a
while. They're the same as my last posting, but have been rebased
to v3.10-rc3.- mpidr linearisation (multiprocessor id register - identifies which
CPU number we are in the system)This patch series that implements MPIDR linearization through a
simple hashing algorithm and updates current cpu_{suspend}/{resume}
code to use the newly created hash structures to retrieve context
pointers. It represents a stepping stone for the implementation of
power management code on forthcoming multi-cluster ARM systems.It has been tested on TC2 (dual cluster A15xA7 system), iMX6q,
OMAP4 and Tegra, with processors hitting low-power states requiring
warm-boot resume through the cpu_resume code path"* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (77 commits)
ARM: 7775/1: mm: Remove do_sect_fault from LPAE code
ARM: 7777/1: Avoid extra calls to the C compiler
ARM: 7774/1: Fix dtb dependency to use order-only prerequisites
ARM: 7770/1: remove residual ARMv2 support from decompressor
ARM: 7769/1: Cortex-A15: fix erratum 798181 implementation
ARM: 7768/1: prevent risks of out-of-bound access in ASID allocator
ARM: 7767/1: let the ASID allocator handle suspended animation
ARM: 7766/1: versatile: don't mark pen as __INIT
ARM: 7765/1: perf: Record the user-mode PC in the call chain.
ARM: 7735/2: Preserve the user r/w register TPIDRURW on context switch and fork
ARM: kernel: implement stack pointer save array through MPIDR hashing
ARM: kernel: build MPIDR hash function data structure
ARM: mpu: Ensure that MPU depends on CPU_V7
ARM: mpu: protect the vectors page with an MPU region
ARM: mpu: Allow enabling of the MPU via kconfig
ARM: 7758/1: introduce config HAS_BANDGAP
ARM: 7757/1: mm: don't flush icache in switch_mm with hardware broadcasting
ARM: 7751/1: zImage: don't overwrite ourself with a page table
ARM: 7749/1: spinlock: retry trylock operation if strex fails on free lock
ARM: 7748/1: oabi: handle faults when loading swi instruction from userspace
...
03 Jul, 2013
5 commits
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This is a simple driver for the global timer module found in the Cortex
A9-MP cores from revision r1p0 onwards. This should be able to perform
the functions of the system timer and the local timer in an SMP system.The global timer has the following features:
The global timer is a 64-bit incrementing counter with an
auto-incrementing feature. It continues incrementing after sending
interrupts. The global timer is memory mapped in the private memory
region.
The global timer is accessible to all Cortex-A9 processors in the
cluster. Each Cortex-A9 processor has a private 64-bit comparator that
is used to assert a private interrupt when the global timer has reached
the comparator value. All the Cortex-A9 processors in a design use the
banked ID, ID27, for this interrupt. ID27 is sent to the Interrupt
Controller as a Private Peripheral Interrupt. The global timer is
clocked by PERIPHCLK.Signed-off-by: Stuart Menefy
Signed-off-by: Srinivas Kandagatla
CC: Arnd Bergmann
CC: Rob Herring
CC: Linus Walleij
CC: Will Deacon
CC: Thomas Gleixner
Signed-off-by: Daniel Lezcano -
Pull ARM SoC late changes from Arnd Bergmann:
"These are changes that arrived a little late before the merge window
or that have multiple dependencies on previous branches so they did
not fit into one of the earlier ones. There are 10 branches merged
here, a total of 39 non-merge commits. Contents are a mixed bag for
the above reasons:* Two new SoC platforms: ST microelectronics stixxxx and the TI
'Nspire' graphing calculator. These should have been in the 'soc'
branch but were a little late
* Support for the Exynos 5420 variant in mach-exynos, which is based
on the other exynos branches to avoid conflicts.
* Various small changes for sh-mobile, ux500 and davinci
* Common clk support for MSM"* tag 'late-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (39 commits)
ARM: ux500: bail out on alien cpus
ARM: davinci: da850: adopt to pinctrl-single change for configuring multiple pins
serial: sh-sci: Initialise variables before access in sci_set_termios()
ARM: stih41x: Add B2020 board support
ARM: stih41x: Add B2000 board support
ARM: sti: Add DEBUG_LL console support
ARM: sti: Add STiH416 SOC support
ARM: sti: Add STiH415 SOC support
ARM: msm: Migrate to common clock framework
ARM: msm: Make proc_comm clock control into a platform driver
ARM: msm: Prepare clk_get() users in mach-msm for clock-pcom driver
ARM: msm: Remove clock-7x30.h include file
ARM: msm: Remove custom clk_set_{max,min}_rate() API
ARM: msm: Remove custom clk_set_flags() API
msm: iommu: Use clk_set_rate() instead of clk_set_min_rate()
msm: iommu: Convert to clk_prepare/unprepare
msm_sdcc: Convert to clk_prepare/unprepare
usb: otg: msm: Convert to clk_prepare/unprepare
msm_serial: Use devm_clk_get() and properly return errors
msm_serial: Convert to clk_prepare/unprepare
... -
Pull ARM SoC driver specific changes from Arnd Bergmann:
"These changes are all driver specific and cross over between arm-soc
contents and some other subsystem, in these cases cpufreq, crypto,
dma, pinctrl, mailbox and usb, and the subsystem owners agreed to have
these changes merged through arm-soc.As we proceed to untangle the dependencies between platform code and
driver code, the amount of changes in this category is fortunately
shrinking, for 3.11 we have 16 branches here and 101 non-merge
changesets, the majority of which are for the stedma40 dma engine
driver used in the ux500 platform. Cleaning up that code touches
multiple subsystems, but gets rid of the dependency in the end.The mailbox code moved out from mach-omap2 to drivers/mailbox is an
intermediate step and is still omap specific at the moment. Patches
exist to generalize the subsystem and add other drivers with the same
API, but those did not make it for 3.11."* tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (101 commits)
crypto: ux500: use dmaengine_submit API
crypto: ux500: use dmaengine_prep_slave_sg API
crypto: ux500: use dmaengine_device_control API
crypto: ux500/crypt: add missing __iomem qualifiers
crypto: ux500/hash: add missing static qualifiers
crypto: ux500/hash: use readl on iomem addresses
dmaengine: ste_dma40: Declare memcpy config as static
ARM: ux500: Remove mop500_snowball_ethernet_clock_enable()
ARM: ux500: Correct the EN_3v3 regulator's on/off GPIO
ARM: ux500: Provide a AB8500 GPIO Device Tree node
gpio: rcar: fix gpio_rcar_of_table
gpio-rcar: Remove #ifdef CONFIG_OF around OF-specific sections
gpio-rcar: Reference core gpio documentation in the DT bindings
clk: exynos5250: Add enum entries for divider clock of i2s1 and i2s2
ARM: dts: Update Samsung I2S documentation
ARM: dts: add clock provider information for i2s controllers in Exynos5250
ARM: dts: add Exynos audio subsystem clock controller node
clk: samsung: register audio subsystem clocks using common clock framework
ARM: dts: use #include for all device trees for Samsung
pinctrl: s3c24xx: use correct header for chained_irq functions
... -
Pull ARM SoC device tree changes from Arnd Bergmann:
"These changes from 30 individual branches for the most part update
device tree files, but there are also a few source code changes that
have crept in this time, usually in order to atomically move over a
driver from using hardcoded data to DT probing.A number of platforms change their DT files to use the C preprocessor,
which is causing a bit of churn, but that is hopefully only this once"* tag 'dt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (372 commits)
ARM: at91: dt: rm9200ek: add spi support
ARM: at91: dt: rm9200: add spi support
ARM: at91/DT: at91sam9n12: add SPI DMA client infos
ARM: at91/DT: sama5d3: add SPI DMA client infos
ARM: at91/DT: fix SPI compatibility string
ARM: Kirkwood: Fix the internal register ranges translation
ARM: dts: bcm281xx: change comment to C89 style
ARM: mmc: bcm281xx SDHCI driver (dt mods)
ARM: nomadik: add the new clocks to the device tree
clk: nomadik: implement the Nomadik clocks properly
ARM: dts: omap5-uevm: Provide USB Host PHY clock frequency
ARM: dts: omap4-panda: Fix DVI EDID reads
ARM: dts: omap4-panda: Add USB Host support
arm: mvebu: enable mini-PCIe connectors on Armada 370 RD
ARM: shmobile: irqpin: add a DT property to enable masking on parent
ARM: dts: AM43x EPOS EVM support
ARM: dts: OMAP5: Add bandgap DT entry
ARM: dts: AM33XX: Add pinmux configuration for CPSW to am335x EVM
ARM: dts: AM33XX: Add pinmux configuration for CPSW to EVMsk
ARM: dts: AM33XX: Add pinmux configuration for CPSW to beaglebone
... -
Pull ARM SoC specific changes from Arnd Bergmann:
"These changes are all to SoC-specific code, a total of 33 branches on
17 platforms were pulled into this. Like last time, Renesas sh-mobile
is now the platform with the most changes, followed by OMAP and
EXYNOS.Two new platforms, TI Keystone and Rockchips RK3xxx are added in this
branch, both containing almost no platform specific code at all, since
they are using generic subsystem interfaces for clocks, pinctrl,
interrupts etc. The device drivers are getting merged through the
respective subsystem maintainer trees.One more SoC (u300) is now multiplatform capable and several others
(shmobile, exynos, msm, integrator, kirkwood, clps711x) are moving
towards that goal with this series but need more work.Also noteworthy is the work on PCI here, which is traditionally part
of the SoC specific code. With the changes done by Thomas Petazzoni,
we can now more easily have PCI host controller drivers as loadable
modules and keep them separate from the platform code in
drivers/pci/host. This has already led to the discovery that three
platforms (exynos, spear and imx) are actually using an identical PCIe
host controller and will be able to share a driver once support for
spear and imx is added."* tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (480 commits)
ARM: integrator: let pciv3 use mem/premem from device tree
ARM: integrator: set local side PCI addresses right
ARM: dts: Add pcie controller node for exynos5440-ssdk5440
ARM: dts: Add pcie controller node for Samsung EXYNOS5440 SoC
ARM: EXYNOS: Enable PCIe support for Exynos5440
pci: Add PCIe driver for Samsung Exynos
ARM: OMAP5: voltagedomain data: remove temporary OMAP4 voltage data
ARM: keystone: Move CPU bringup code to dedicated asm file
ARM: multiplatform: always pick one CPU type
ARM: imx: select syscon for IMX6SL
ARM: keystone: select ARM_ERRATA_798181 only for SMP
ARM: imx: Synertronixx scb9328 needs to select SOC_IMX1
ARM: OMAP2+: AM43x: resolve SMP related build error
dmaengine: edma: enable build for AM33XX
ARM: edma: Add EDMA crossbar event mux support
ARM: edma: Add DT and runtime PM support to the private EDMA API
dmaengine: edma: Add TI EDMA device tree binding
arm: add basic support for Rockchip RK3066a boards
arm: add debug uarts for rockchip rk29xx and rk3xxx series
arm: Add basic clocks for Rockchip rk3066a SoCs
...
02 Jul, 2013
1 commit
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This patch add a DT enabled driver for timers found on Marvell Orion SoCs
(Kirkwood, Dove, Orion5x, and Discovery Innovation). It installs a free-
running clocksource on timer0 and a clockevent source on timer1.
Corresponding device tree documentation is also added.Signed-off-by: Sebastian Hesselbarth
Signed-off-by: Daniel Lezcano
Tested-by: Ezequiel Garcia
Tested-by: Andrew Lunn
25 Jun, 2013
2 commits
-
Commit 38ff87f7 (sched_clock: Make ARM's sched_clock generic for all
architectures) changed the header to , so adapt
it in order to fix the following build error:drivers/clocksource/vf_pit_timer.c:15:29: fatal error: asm/sched_clock.h: No such file or directory
Signed-off-by: Fabio Estevam
Cc: shawn.guo@linaro.org
Cc: sboyd@codeaurora.org
Cc: john.stultz@linaro.org
Link: http://lkml.kernel.org/r/1372116008-2323-1-git-send-email-festevam@gmail.com
Signed-off-by: Thomas Gleixner -
Several architectures have a dummy timer driver tightly coupled with
their broadcast code to support machines without cpu-local timers (or
where there is a lack of driver support).Since 12ad100046: "clockevents: Add generic timer broadcast function"
it's been possible to write broadcast-capable timer drivers decoupled
from the broadcast mechanism. We can use this functionality to implement
a generic dummy timer driver that can be shared by all architectures
with generic tick broadcast (ARCH_HAS_TICK_BROADCAST).This patch implements a generic dummy timer using this facility.
[sboyd: Make percpu data static, use __this_cpu_ptr(), move to
early_initcall to properly register on each CPU, only
register if more than one CPU possible]Signed-off-by: Mark Rutland
Signed-off-by: Stephen Boyd
Acked-by: Marc Zyngier ,
Cc: John Stultz
Cc: Daniel Lezcano
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1370291642-13259-3-git-send-email-sboyd@codeaurora.org
Signed-off-by: Thomas Gleixner
21 Jun, 2013
1 commit
-
…it/mmind/linux-rockchip into next/soc
From Heiko Stuebner:
Adds basic support for Rockchip Cortex-A9 SoCs.
* tag 'v3.11-rockchip-basics' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
arm: add basic support for Rockchip RK3066a boards
arm: add debug uarts for rockchip rk29xx and rk3xxx series
arm: Add basic clocks for Rockchip rk3066a SoCs
clocksource: dw_apb_timer_of: use clocksource_of_init
clocksource: dw_apb_timer_of: select DW_APB_TIMER
clocksource: dw_apb_timer_of: add clock-handling
clocksource: dw_apb_timer_of: enable the use the clocksource as sched clockSigned-off-by: Arnd Bergmann <arnd@arndb.de>
20 Jun, 2013
1 commit
-
From Michal Simek:
arm: Xilinx Zynq dt changes for v3.11
The branch contains:
- DT uart handling cleanup
- Support for zc706 and zed board
- Removal of board compatible string* tag 'zynq-dt-for-3.11' of git://git.xilinx.com/linux-xlnx:
arm: dt: zynq: Add support for the zed platform
arm: dt: zynq: Add support for the zc706 platform
arm: dt: zynq: Use 'status' property for UART nodes
arm: zynq: Remove board specific compatibility string
clk: zynq: Remove deprecated clock code
arm: zynq: Migrate platform to clock controller
clk: zynq: Add clock controller driver
clk: zynq: Factor out PLL driverSigned-off-by: Arnd Bergmann
19 Jun, 2013
3 commits
-
The CLOCKSOURCE_OF_DECLARE functions now take a device_node pointer
as their argument, as of the clksrc/cleanup branch in arm-soc.
This patch adapts the bcm_kona_timer driver to the new interface.Signed-off-by: Arnd Bergmann
Acked-by: Christian Daudt
Cc: John Stultz -
This reverts commit 55a68c23e0a675b2b8ac2656fd6edbf98b78e4c6.
In order to avoid a collision with dw_apb_timer changes in
the arm-soc tree, revert this change.I'm leaving it to the arm-soc folks to sort out if they want
to keep the other side of the collision or if they're just going
to back it all out and try again during the next release cycle.Reported-by: Dinh Nguyen
Signed-off-by: John Stultz -
Replace the (setup/remove)_irq calls for local timer registration with
(request/free)_irq calls. This generalizes the local timer registration API.
Suggested by Mark Rutland.Signed-off-by: Chander Kashyap
Acked-by: Mark Rutland
Reviewed-by: Tomasz Figa
Signed-off-by: Kukjin Kim
15 Jun, 2013
1 commit
-
…l/git/linusw/linux-stericsson into next/drivers
From Linus Walleij:
Ux500 clocksource updates:
- Use relaxed readl() variant
- Fix a single comment* tag 'ux500-clksrc-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson:
clocksource: dbx500-prcmu: comment cleanup
clocksource: dbx500-prcmu: use relaxed readl variantSigned-off-by: Olof Johansson <olof@lixom.net>
13 Jun, 2013
2 commits
-
Log core clock and Meta timer frequencies during init in architecture
generic code, removing the need for equivalent log messages in SoC
specific code.Signed-off-by: James Hogan
Cc: John Stultz
Cc: Thomas Gleixner -
Nothing about the sched_clock implementation in the ARM port is
specific to the architecture. Generalize the code so that other
architectures can use it by selecting GENERIC_SCHED_CLOCK.Signed-off-by: Stephen Boyd
[jstultz: Merge minor collisions with other patches in my tree]
Signed-off-by: John Stultz
12 Jun, 2013
4 commits
-
dw_apb_timer_init used to search the devicetree for matching timer
devices, making calls to it from board files necessary.Change the dw_apb_timer_init to work with CLOCKSOURCE_OF_DECLARE.
With this change the function gets called once for each timer node
and tracks these number of calls to attach clockevent and clocksource
devices to the nodes.Also remove the calls to dw_apb_timer_init from all previous users, as
clocksource_of_init is the default for init_time now.Tested on the upcoming rk3066 code.
Signed-off-by: Heiko Stuebner
Acked-by: Rob Herring
Acked-by: Arnd Bergmann
Acked-by: Jamie Iles
Acked-by: Dinh Nguyen -
dw_apb_timer_of is the driver part facing devicetree platforms and
calls into dw_apb_timer with the data gathered from the dt.Currently the two platforms using the dw_apb_timer_of select both
the options for the core timer and the dt addon.As dw_apb_timer_of always depends on dw_apb_timer let it select
DW_APB_TIMER itself without the need for every platform to do it.Signed-off-by: Heiko Stuebner
Acked-by: Jamie Iles
Acked-by: Dinh Nguyen -
Add the possibility to get the clock-frequency from a timer clock instead
of specifying it as dt property. Additionally also add the possibility
to also define a controlling periphal clock for the timer block.The clock-frequency property is kept to act as fallback if no clocks
are specified.Signed-off-by: Heiko Stuebner
Acked-by: Jamie Iles -
Currently the dw_apb_timer always expects a separate special timer to be
availbable for the sched_clock. Some devices using dw_apb_timers do not
have this sptimer but can use the clocksource as sched_clock instead.Therefore enable the driver to distiguish between devices with and without
sptimer based on the devicetree data and select the correct timer as
sched_clock.Signed-off-by: Heiko Stuebner
Acked-by: Linus Walleij
Acked-by: Jamie Iles
09 Jun, 2013
1 commit
-
…vents into timers/core
07 Jun, 2013
1 commit
-
Switching between reading the virtual or physical counters is
problematic, as some core code wants a view of time before we're fully
set up. Using a function pointer and switching the source after the
first read can make time appear to go backwards, and having a check in
the read function is an unfortunate block on what we want to be a fast
path.Instead, this patch makes us always use the virtual counters. If we're a
guest, or don't have hyp mode, we'll use the virtual timers, and as such
don't care about CNTVOFF as long as it doesn't change in such a way as
to make time appear to travel backwards. As the guest will use the
virtual timers, a (potential) KVM host must use the physical timers
(which can wake up the host even if they fire while a guest is
executing), and hence a host must have CNTVOFF set to zero so as to have
a consistent view of time between the physical timers and virtual
counters.Signed-off-by: Mark Rutland
Acked-by: Catalin Marinas
Acked-by: Marc Zyngier
Acked-by: Santosh Shilimkar
Cc: Rob Herring
06 Jun, 2013
3 commits
-
This patch adds a clocksource/clockevent driver for the timer found on some
models in the TI-Nspire calculator series. The timer has two 16bit subtimers
within its memory mapped I/O interface but only the first can generate
interrupts. The first subtimer is used to generate clockevents but only if an
interrupt number and register is given.The interrupt acknowledgement mechanism is a little strange because the
interrupt mask and acknowledge registers are located in another memory mapped
I/O peripheral. The address of this register is passed to the driver through
device tree bindings.The second subtimer is used as a clocksource because it isn't capable of
generating an interrupt. This subtimer is always added.Reviewed-by: Linus Walleij
Signed-off-by: Daniel Tang
Signed-off-by: Daniel Lezcano -
Add Freescale Vybrid Family period interrupt timer support.
Signed-off-by: Jingchang Lu
Reviewed-by: Daniel Lezcano
Acked-by: Shawn Guo
Signed-off-by: Daniel Lezcano -
irq_of_parse_and_map() returns 0 on error, while the code checks for NO_IRQ.
This breaks on platforms that have NO_IRQ != 0.Cc:
Signed-off-by: Baruch Siach
Signed-off-by: Daniel Lezcano
01 Jun, 2013
1 commit
-
The clocksource API has changed slightly, which causes a harmless
warning:/git/arm-soc/drivers/clocksource/nomadik-mtu.c:259:28: warning: 'nmdk_timer_match' defined but not used [-Wunused-variable]
static struct of_device_id nmdk_timer_match[] __initconst = {
^Fortunately, the same API change also lets us simplify the code
while removing the warning.Signed-off-by: Arnd Bergmann
Signed-off-by: Olof Johansson
29 May, 2013
2 commits
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The time.h header seems not to be used by current code.
Removing this include allows the driver to build on other
architecture that do not have this header.Cc: Ingo Molnar
Cc: Peter Zijlstra
Cc: John Stultz
Cc: Thomas Gleixner
Cc: Jamie Iles
Cc: Dinh Nguyen
Acked-by: Jamie Iles
Signed-off-by: Baruch Siach
[tweaked commit message and header]
Signed-off-by: John Stultz -
It seems we made a mistake when creating dw_apb_timer_of.c:
picoxcell sched_clock had parts that were not related to
dw_apb_timer, yet we moved them to dw_apb_timer_of, and tried to
use them on socfpga.This results in system where user/system time is not measured
properly, as demonstrated bytime dd if=/dev/urandom of=/dev/zero bs=100000 count=100
So this patch switches sched_clock to hardware that exists on both
platforms, and adds missing of_node_put() in dw_apb_timer_init().Signed-off-by: Pavel Machek
Acked-by: Jamie Iles
Signed-off-by: John Stultz
27 May, 2013
3 commits
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Remove references to the deprecated DB5500 platform.
Acked-by: Linus Walleij
Signed-off-by: Fabio Baltieri
Signed-off-by: Linus Walleij -
Modify clksrc_dbx500_prcmu_read to replace readl() with readl_relaxed().
This speeds up calls to the function by about 40%.Signed-off-by: Rabin Vincent
Acked-by: Linus Walleij
Signed-off-by: Fabio Baltieri
Signed-off-by: Linus Walleij -
Migrate the Zynq platform and its drivers to use the new clock
controller driver.Signed-off-by: Soren Brinkmann
Cc: John Stultz
Cc: Thomas Gleixner
Cc: Greg Kroah-Hartman
Cc: Jiri Slaby
Cc: linux-serial@vger.kernel.org
Signed-off-by: Michal Simek
Acked-by: Mike Turquette
16 May, 2013
1 commit
-
Signed-off-by: Thomas Gleixner
Acked-by: John Stultz
Cc: Magnus Damm
Acked-by: Jamie Iles
Link: http://lkml.kernel.org/r/20130425143435.558006195@linutronix.de
Signed-off-by: Thomas Gleixner
13 May, 2013
1 commit
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Support device tree probe of the nomadik-mtu clocksource.
Signed-off-by: Rabin Vincent
08 May, 2013
2 commits
-
Pull late ARM Exynos multiplatform changes from Arnd Bergmann:
"These continue the multiplatform support for exynos, adding support
for building most of the essential drivers (clocksource, clk, irqchip)
when combined with other platforms. As a result, it should become
really easy to add full multiplatform exynos support in 3.11, although
we don't yet enable it for 3.10.The changes were not included in the earlier multiplatform series in
order to avoid clashes with the other Exynos updates.This also includes work from Tomasz Figa to fix the pwm clocksource
code on Exynos, which is not strictly required for multiplatform, but
related to the other patches in this set and needed as a bug fix for
at least one board."* tag 'multiplatform-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (22 commits)
ARM: dts: exynops4210: really add universal_c210 dts
ARM: dts: exynos4210: Add basic dts file for universal_c210 board
ARM: dts: exynos4: Add node for PWM device
ARM: SAMSUNG: Do not register legacy timer interrupts on Exynos
clocksource: samsung_pwm_timer: Work around rounding errors in clockevents core
clocksource: samsung_pwm_timer: Correct programming of clock events
clocksource: samsung_pwm_timer: Use proper clockevents max_delta
clocksource: samsung_pwm_timer: Add support for non-DT platforms
clocksource: samsung_pwm_timer: Drop unused samsung_pwm struct
clocksource: samsung_pwm_timer: Keep all driver data in a structure
clocksource: samsung_pwm_timer: Make PWM spinlock global
clocksource: samsung_pwm_timer: Let platforms select the driver
Documentation: Add device tree bindings for Samsung PWM timers
clocksource: add samsung pwm timer driver
irqchip: exynos: look up irq using irq_find_mapping
irqchip: exynos: pass irq_base from platform
irqchip: exynos: localize irq lookup for ATAGS
irqchip: exynos: allocate combiner_data dynamically
irqchip: exynos: pass max combiner number to combiner_init
ARM: exynos: add missing properties for combiner IRQs
... -
Pull ARM SoC late cleanups from Arnd Bergmann:
"These are cleanups and smaller changes that either depend on earlier
feature branches or came in late during the development cycle. We
normally try to get all cleanups early, so these are the exceptions:- A follow-up on the clocksource reworks, hopefully the last time we
need to merge clocksource subsystem changes through arm-soc.A first set of patches was part of the original 3.10 arm-soc
cleanup series because of interdependencies with timer drivers now
moved out of arch/arm.- Migrating the SPEAr13xx platform away from using auxdata for DMA
channel descriptions towards using information in device tree,
based on the earlier SPEAr multiplatform series- A few follow-ups on the Atmel SAMA5 support and other changes for
Atmel at91 based on the larger at91 reworks.- Moving the armada irqchip implementation to drivers/irqchip
- Several OMAP cleanups following up on the larger series already
merged in 3.10."* tag 'cleanup-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (50 commits)
ARM: OMAP4: change the device names in usb_bind_phy
ARM: OMAP2+: Fix mismerge for timer.c between ff931c82 and da4a686a
ARM: SPEAr: conditionalize SMP code
ARM: arch_timer: Silence debug preempt warnings
ARM: OMAP: remove unused variable
serial: amba-pl011: fix !CONFIG_DMA_ENGINE case
ata: arasan: remove the need for platform_data
ARM: at91/sama5d34ek.dts: remove not needed compatibility string
ARM: at91: dts: add MCI DMA support
ARM: at91: dts: add i2c dma support
ARM: at91: dts: set #dma-cells to the correct value
ARM: at91: suspend both memory controllers on at91sam9263
irqchip: armada-370-xp: slightly cleanup irq controller driver
irqchip: armada-370-xp: move IRQ handler to avoid forward declaration
irqchip: move IRQ driver for Armada 370/XP
ARM: mvebu: move L2 cache initialization in init_early()
devtree: add binding documentation for sp804
ARM: integrator-cp: convert use CLKSRC_OF for timer init
ARM: versatile: use OF init for sp804 timer
ARM: versatile: add versatile dtbs to dtbs target
...