24 Sep, 2020
1 commit
-
Since commit 7484c727b636 ("ARM: realview: delete the RealView board
files") and commit 16956fed35fe ("ARM: versatile: switch to DT only
booting and remove legacy code"), there's no one to use the functions
defined or declared in include/clocksource/timer-sp804.h. Delete it.Signed-off-by: Zhen Lei
Signed-off-by: Daniel Lezcano
Link: https://lore.kernel.org/r/20200918132237.3552-3-thunder.leizhen@huawei.com
13 Aug, 2020
1 commit
-
Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.Signed-off-by: Alexander A. Klimov
Signed-off-by: Andrew Morton
Reviewed-by: Kees Cook
Link: http://lkml.kernel.org/r/20200726110117.16346-1-grandmaster@al2klimov.de
Signed-off-by: Linus Torvalds
31 Mar, 2020
1 commit
-
pwm_omap_dmtimer.h is used only:
- to typedef struct omap_dm_timer to pwm_omap_dmtimer
- for macro PWM_OMAP_DMTIMER_TRIGGER_OVERFLOW_AND_COMPARE
Rest of the file is pretty mush unsed. So reuse omap_dm_timer
and OMAP_TIMER_TRIGGER_OVERFLOW_AND_COMPARE in pwm-omap-dmtimer.c
and delete the header file.Acked-by: Tony Lindgren
Signed-off-by: Lokesh Vutla
Acked-by: Uwe Kleine-König
Signed-off-by: Thierry Reding
16 Mar, 2020
2 commits
-
omap_dm_timer_enable() restores the entire context(including counter)
based on 2 conditions:
- If get_context_loss_count is populated and context is lost.
- If get_context_loss_count is not populated update unconditionally.Case2 has a side effect of updating the counter register even though
context is not lost. When timer is configured in pwm mode, this is
causing undesired behaviour in the pwm period.Instead of using get_context_loss_count call back, implement cpu_pm
notifier with context save and restore support. And delete the
get_context_loss_count callback all together.Suggested-by: Tony Lindgren
Signed-off-by: Lokesh Vutla
[tony@atomide.com: removed pm_runtime calls from cpuidle calls]
Signed-off-by: Tony Lindgren
Signed-off-by: Daniel Lezcano
Link: https://lore.kernel.org/r/20200316111453.15441-1-lokeshvutla@ti.com -
Let's add runtime_suspend and resume functions and atomic enabled
flag. This way we can use these when converting to use cpuidle
for saving and restoring device context.And we need to maintain the driver state in the driver as documented
in "9. Autosuspend, or automatically-delayed suspends" in the
Documentation/power/runtime_pm.rst document related to using driver
private lock and races with runtime_suspend().Signed-off-by: Tony Lindgren
Signed-off-by: Lokesh Vutla
Signed-off-by: Daniel Lezcano
Link: https://lore.kernel.org/r/20200305082715.15861-3-lokeshvutla@ti.com
17 Jan, 2020
1 commit
-
hyperv_timer.c exports hyperv_cs, which is used by stimers and the
timesync mechanism. However, the clocksource dependency is not
needed: these mechanisms only depend on the partition reference
counter (which can be read via a MSR or via the TSC Reference Page).Introduce the (function) pointer hv_read_reference_counter, as an
embodiment of the partition reference counter read, and export it
in place of the hyperv_cs pointer. The latter can be removed.This should clarify that there's no relationship between Hyper-V
stimers & timesync and the Linux clocksource abstractions. No
functional or semantic change.Suggested-by: Michael Kelley
Signed-off-by: Andrea Parri
Reviewed-by: Michael Kelley
Signed-off-by: Daniel Lezcano
Link: https://lore.kernel.org/r/20200109160650.16150-2-parri.andrea@gmail.com
15 Nov, 2019
1 commit
-
Hyper-V has historically initialized stimer-based clockevents late in the
process of onlining a CPU because clockevents depend on stimer
interrupts. In the original Hyper-V design, stimer interrupts generate a
VMbus message, so the VMbus machinery must be running first, and VMbus
can't be initialized until relatively late. On x86/64, LAPIC timer based
clockevents are used during early initialization before VMbus and
stimer-based clockevents are ready, and again during CPU offlining after
the stimer clockevents have been shut down.Unfortunately, this design creates problems when offlining CPUs for
hibernation or other purposes. stimer-based clockevents are shut down
relatively early in the offlining process, so clockevents_unbind_device()
must be used to fallback to the LAPIC-based clockevents for the remainder
of the offlining process. Furthermore, the late initialization and early
shutdown of stimer-based clockevents doesn't work well on ARM64 since there
is no other timer like the LAPIC to fallback to. So CPU onlining and
offlining doesn't work properly.Fix this by recognizing that stimer Direct Mode is the normal path for
newer versions of Hyper-V on x86/64, and the only path on other
architectures. With stimer Direct Mode, stimer interrupts don't require any
VMbus machinery. stimer clockevents can be initialized and shut down
consistent with how it is done for other clockevent devices. While the old
VMbus-based stimer interrupts must still be supported for backward
compatibility on x86, that mode of operation can be treated as legacy.So add a new Hyper-V stimer entry in the CPU hotplug state list, and use
that new state when in Direct Mode. Update the Hyper-V clocksource driver
to allocate and initialize stimer clockevents earlier during boot. Update
Hyper-V initialization and the VMbus driver to use this new design. As a
result, the LAPIC timer is no longer used during boot or CPU
onlining/offlining and clockevents_unbind_device() is not called. But
retain the old design as a legacy implementation for older versions of
Hyper-V that don't support Direct Mode.Signed-off-by: Michael Kelley
Signed-off-by: Thomas Gleixner
Tested-by: Dexuan Cui
Reviewed-by: Dexuan Cui
Link: https://lkml.kernel.org/r/1573607467-9456-1-git-send-email-mikelley@microsoft.com
23 Aug, 2019
1 commit
-
There is no particular reason to not enable TSC page clocksource on
32-bit. mul_u64_u64_shr() is available and despite the increased
computational complexity (compared to 64bit) TSC page is still a huge win
compared to MSR-based clocksource.In-kernel reads:
MSR based clocksource: 3361 cycles
TSC page clocksource: 49 cyclesReads from userspace (utilizing vDSO in case of TSC page):
MSR based clocksource: 5664 cycles
TSC page clocksource: 131 cyclesEnabling TSC page on 32bits allows to get rid of CONFIG_HYPERV_TSCPAGE as
it is now not any different from CONFIG_HYPERV_TIMER.Signed-off-by: Vitaly Kuznetsov
Signed-off-by: Thomas Gleixner
Reviewed-by: Michael Kelley
Link: https://lkml.kernel.org/r/20190822083630.17059-1-vkuznets@redhat.com
03 Jul, 2019
3 commits
-
Continue consolidating Hyper-V clock and timer code into an ISA
independent Hyper-V clocksource driver.Move the existing clocksource code under drivers/hv and arch/x86 to the new
clocksource driver while separating out the ISA dependencies. Update
Hyper-V initialization to call initialization and cleanup routines since
the Hyper-V synthetic clock is not independently enumerated in ACPI.Update Hyper-V clocksource users in KVM and VDSO to get definitions from
the new include file.No behavior is changed and no new functionality is added.
Suggested-by: Marc Zyngier
Signed-off-by: Michael Kelley
Signed-off-by: Thomas Gleixner
Reviewed-by: Vitaly Kuznetsov
Cc: "bp@alien8.de"
Cc: "will.deacon@arm.com"
Cc: "catalin.marinas@arm.com"
Cc: "mark.rutland@arm.com"
Cc: "linux-arm-kernel@lists.infradead.org"
Cc: "gregkh@linuxfoundation.org"
Cc: "linux-hyperv@vger.kernel.org"
Cc: "olaf@aepfle.de"
Cc: "apw@canonical.com"
Cc: "jasowang@redhat.com"
Cc: "marcelo.cerri@canonical.com"
Cc: Sunil Muthuswamy
Cc: KY Srinivasan
Cc: "sashal@kernel.org"
Cc: "vincenzo.frascino@arm.com"
Cc: "linux-arch@vger.kernel.org"
Cc: "linux-mips@vger.kernel.org"
Cc: "linux-kselftest@vger.kernel.org"
Cc: "arnd@arndb.de"
Cc: "linux@armlinux.org.uk"
Cc: "ralf@linux-mips.org"
Cc: "paul.burton@mips.com"
Cc: "daniel.lezcano@linaro.org"
Cc: "salyzyn@android.com"
Cc: "pcc@google.com"
Cc: "shuah@kernel.org"
Cc: "0x7f454c46@gmail.com"
Cc: "linux@rasmusvillemoes.dk"
Cc: "huw@codeweavers.com"
Cc: "sfr@canb.auug.org.au"
Cc: "pbonzini@redhat.com"
Cc: "rkrcmar@redhat.com"
Cc: "kvm@vger.kernel.org"
Link: https://lkml.kernel.org/r/1561955054-1838-3-git-send-email-mikelley@microsoft.com -
Hyper-V clock/timer code and data structures are currently mixed
in with other code in the ISA independent drivers/hv directory as
well as the ISA dependent Hyper-V code under arch/x86.Consolidate this code and data structures into a Hyper-V clocksource driver
to better follow the Linux model. In doing so, separate out the ISA
dependent portions so the new clocksource driver works for x86 and for the
in-process Hyper-V on ARM64 code.To start, move the existing clockevents code to create the new clocksource
driver. Update the VMbus driver to call initialization and cleanup routines
since the Hyper-V synthetic timers are not independently enumerated in
ACPI.No behavior is changed and no new functionality is added.
Suggested-by: Marc Zyngier
Signed-off-by: Michael Kelley
Signed-off-by: Thomas Gleixner
Reviewed-by: Vitaly Kuznetsov
Cc: "bp@alien8.de"
Cc: "will.deacon@arm.com"
Cc: "catalin.marinas@arm.com"
Cc: "mark.rutland@arm.com"
Cc: "linux-arm-kernel@lists.infradead.org"
Cc: "gregkh@linuxfoundation.org"
Cc: "linux-hyperv@vger.kernel.org"
Cc: "olaf@aepfle.de"
Cc: "apw@canonical.com"
Cc: "jasowang@redhat.com"
Cc: "marcelo.cerri@canonical.com"
Cc: Sunil Muthuswamy
Cc: KY Srinivasan
Cc: "sashal@kernel.org"
Cc: "vincenzo.frascino@arm.com"
Cc: "linux-arch@vger.kernel.org"
Cc: "linux-mips@vger.kernel.org"
Cc: "linux-kselftest@vger.kernel.org"
Cc: "arnd@arndb.de"
Cc: "linux@armlinux.org.uk"
Cc: "ralf@linux-mips.org"
Cc: "paul.burton@mips.com"
Cc: "daniel.lezcano@linaro.org"
Cc: "salyzyn@android.com"
Cc: "pcc@google.com"
Cc: "shuah@kernel.org"
Cc: "0x7f454c46@gmail.com"
Cc: "linux@rasmusvillemoes.dk"
Cc: "huw@codeweavers.com"
Cc: "sfr@canb.auug.org.au"
Cc: "pbonzini@redhat.com"
Cc: "rkrcmar@redhat.com"
Cc: "kvm@vger.kernel.org"
Link: https://lkml.kernel.org/r/1561955054-1838-2-git-send-email-mikelley@microsoft.com -
so the hyper-v clocksource update can be applied.
26 Jun, 2019
1 commit
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Currently the clocksource and clockevent support for davinci platforms
lives in mach-davinci. It hard-codes many things, uses global variables,
implements functionalities unused by any platform and has code fragments
scattered across many (often unrelated) files.Implement a new, modern and simplified timer driver and put it into
drivers/clocksource. We still need to support legacy board files so
export a config structure and a function that allows machine code to
register the timer.The timer we're using is 64-bit but can be programmed in dual 32-bit
mode (both chained and unchained).On all davinci SoCs except for da830 we're using both halves. Lower half
for clockevents and upper half for clocksource. On da830 we're using the
lower half for both with the help of a compare register.This patch contains the core code and support for clockevent. The
clocksource code will be included in a subsequent patch.Signed-off-by: Bartosz Golaszewski
Signed-off-by: Daniel Lezcano
19 Jun, 2019
1 commit
-
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation this program is
distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details you should have received a copy of the gnu general
public license along with this program if not see http www gnu org
licensesextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 503 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Alexios Zavras
Reviewed-by: Allison Randal
Reviewed-by: Enrico Weigelt
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190602204653.811534538@linutronix.de
Signed-off-by: Greg Kroah-Hartman
05 Jun, 2019
1 commit
-
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation version 2 of the licenseextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 315 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Allison Randal
Reviewed-by: Armijn Hemel
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190531190115.503150771@linutronix.de
Signed-off-by: Greg Kroah-Hartman
20 Feb, 2019
1 commit
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A host running in VHE mode gets the EL2 physical timer as its time
source (accessed using the EL1 sysreg accessors, which get re-directed
to the EL2 sysregs by VHE).The EL1 physical timer remains unused by the host kernel, allowing us to
pass that on directly to a KVM guest and saves us from emulating this
timer for the guest on VHE systems.Store the EL1 Physical Timer's IRQ number in
struct arch_timer_kvm_info on VHE systems to allow KVM to use it.Acked-by: Daniel Lezcano
Signed-off-by: Andre Przywara
Signed-off-by: Marc Zyngier
Signed-off-by: Christoffer Dall
06 Apr, 2018
1 commit
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Pull ARM SoC platform updates from Arnd Bergmann:
"This release brings up a new platform based on the old ARM9 core: the
Nuvoton NPCM is used as a baseboard management controller, competing
with the better known ASpeed AST2xx series.Another important change is the addition of ARMv7-A based chips in
mach-stm32. The older parts in this platform are ARMv7-M based
microcontrollers, now they are expanding to general-purpose workloads.The other changes are the usual defconfig updates to enable additional
drivers, lesser bugfixes. The largest updates as often are the ongoing
OMAP cleanups, but we also have a number of changes for the older PXA
and davinci platforms this time.For the Renesas shmobile/r-car platform, some new infrastructure is
needed to make the watchdog work correctly.Supporting Multiprocessing on Allwinner A80 required a significant
amount of new code, but is not doing anything unexpected"* tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (179 commits)
arm: npcm: modify configuration for the NPCM7xx BMC.
MAINTAINERS: update entry for ARM/berlin
ARM: omap2: fix am43xx build without L2X0
ARM: davinci: da8xx: simplify CFGCHIP regmap_config
ARM: davinci: da8xx: fix oops in USB PHY driver due to stack allocated platform_data
ARM: multi_v7_defconfig: add NXP FlexCAN IP support
ARM: multi_v7_defconfig: enable thermal driver for i.MX devices
ARM: multi_v7_defconfig: add RN5T618 PMIC family support
ARM: multi_v7_defconfig: add NXP graphics drivers
ARM: multi_v7_defconfig: add GPMI NAND controller support
ARM: multi_v7_defconfig: add OCOTP driver for NXP SoCs
ARM: multi_v7_defconfig: configure I2C driver built-in
arm64: defconfig: add CONFIG_UNIPHIER_THERMAL and CONFIG_SNI_AVE
ARM: imx: fix imx6sll-only build
ARM: imx: select ARM_CPU_SUSPEND for CPU_IDLE as well
ARM: mxs_defconfig: Re-sync defconfig
ARM: imx_v4_v5_defconfig: Use the generic fsl-asoc-card driver
ARM: imx_v4_v5_defconfig: Re-sync defconfig
arm64: defconfig: enable stmmac ethernet to defconfig
ARM: EXYNOS: Simplify code in coupled CPU idle hot path
...
01 Mar, 2018
1 commit
-
As dmtimer no longer exports functions, make those previously
exported static (this requires few functions to be moved around
as their prototypes were deleted).Signed-off-by: Ladislav Michl
Signed-off-by: Tony Lindgren
23 Feb, 2018
3 commits
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Now that arch/metag/ has been removed, remove the metag generic
per-thread timer driver. It is of no value without the architecture
code.Signed-off-by: James Hogan
Acked-by: Daniel Lezcano
Cc: Thomas Gleixner
Cc: linux-metag@vger.kernel.org -
Replace architecture specific guard with clocksource guard.
Signed-off-by: Keerthy
Signed-off-by: Tony Lindgren -
The header file is currently under plat-omap directory
under arch/omap. Move this out to an accessible place.No Code changes done to the header file and renamed to timer-ti-dm.h.
Signed-off-by: Keerthy
Reviewed-by: Sebastian Reichel
Tested-by: Ladislav Michl
Signed-off-by: Tony Lindgren
16 Nov, 2017
1 commit
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Pull arm64 updates from Will Deacon:
"The big highlight is support for the Scalable Vector Extension (SVE)
which required extensive ABI work to ensure we don't break existing
applications by blowing away their signal stack with the rather large
new vector context ( of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (97 commits)
arm64: Make ARMV8_DEPRECATED depend on SYSCTL
arm64: Implement __lshrti3 library function
arm64: support __int128 on gcc 5+
arm64/sve: Add documentation
arm64/sve: Detect SVE and activate runtime support
arm64/sve: KVM: Hide SVE from CPU features exposed to guests
arm64/sve: KVM: Treat guest SVE use as undefined instruction execution
arm64/sve: KVM: Prevent guests from using SVE
arm64/sve: Add sysctl to set the default vector length for new processes
arm64/sve: Add prctl controls for userspace vector length management
arm64/sve: ptrace and ELF coredump support
arm64/sve: Preserve SVE registers around EFI runtime service calls
arm64/sve: Preserve SVE registers around kernel-mode NEON use
arm64/sve: Probe SVE capabilities and usable vector lengths
arm64: cpufeature: Move sys_caps_initialised declarations
arm64/sve: Backend logic for setting the vector length
arm64/sve: Signal handling support
arm64/sve: Support vector length resetting for new processes
arm64/sve: Core task context handling
arm64/sve: Low-level CPU setup
...
02 Nov, 2017
1 commit
-
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.By default all files without license information are under the default
license of the kernel, which is GPL version 2.Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if
Reviewed-by: Philippe Ombredanne
Reviewed-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman
14 Oct, 2017
2 commits
-
The current delay implementation uses the yield instruction, which is a
hint that it is beneficial to schedule another thread. As this is a hint,
it may be implemented as a NOP, causing all delays to be busy loops. This
is the case for many existing CPUs.Taking advantage of the generic timer sending periodic events to all
cores, we can use WFE during delays to reduce power consumption. This is
beneficial only for delays longer than the period of the timer event
stream.If timer event stream is not enabled, delays will behave as yield/busy
loops.Signed-off-by: Julien Thierry
Cc: Catalin Marinas
Cc: Will Deacon
Cc: Mark Rutland
Signed-off-by: Will Deacon -
The arch timer configuration for a CPU might get reset after suspending
said CPU.In order to reliably use the event stream in the kernel (e.g. for delays),
we keep track of the state where we can safely consider the event stream as
properly configured. After writing to cntkctl, we issue an ISB to ensure
that subsequent delay loops can rely on the event stream being enabled.Signed-off-by: Julien Thierry
Acked-by: Mark Rutland
Cc: Marc Zyngier
Cc: Russell King
Cc: Catalin Marinas
Cc: Will Deacon
Signed-off-by: Will Deacon
19 Apr, 2017
1 commit
-
In preparation for ACPI GTDT support, this patch adds structs to
describe the MMIO timers indepedent of the firmware interface.Subsequent patches will use these to split the FW/HW probing logic, so
that the HW probing logic can be shared by ACPI and DT.Signed-off-by: Fu Wei
Reviewed-by: Hanjun Guo
Signed-off-by: Mark Rutland
10 Apr, 2017
2 commits
-
This patch add a new enum "arch_timer_spi_nr" and use it in the driver.
Just for code's readability, no functional change.Signed-off-by: Fu Wei
Acked-by: Mark Rutland
Signed-off-by: Mark Rutland -
To support the arm_arch_timer via ACPI we need to share defines and enums
between the driver and the ACPI parser code.
So we split out the relevant defines and enums into arm_arch_timer.h.No functional change.
Signed-off-by: Fu Wei
Acked-by: Mark Rutland
Tested-by: Xiongfeng Wang
Signed-off-by: Mark Rutland
18 Oct, 2016
1 commit
-
As both pxa and sa1100 provide a clock to the timer, the rate can be
inferred from the clock rather than hard encoded in a functional call.This patch changes the pxa timer to have a mandatory clock which is used
as the timer rate.Signed-off-by: Robert Jarzmik
Acked-by: Daniel Lezcano
Acked-by: Russell King
28 Jun, 2016
1 commit
-
The init functions do not return any error. They behave as the following:
- panic, thus leading to a kernel crash while another timer may work and
make the system boot up correctlyor
- print an error and let the caller unaware if the state of the system
Change that by converting the init functions to return an error conforming
to the CLOCKSOURCE_OF_RET prototype.Proper error handling (rollback, errno value) will be changed later case
by case, thus this change just return back an error or success in the init
function.Signed-off-by: Daniel Lezcano
03 May, 2016
3 commits
-
The only call of arch_timer_get_timecounter (in KVM) has been removed.
Signed-off-by: Julien Grall
Acked-by: Christoffer Dall
Signed-off-by: Christoffer Dall -
Currently, the firmware table is parsed by the virtual timer code in
order to retrieve the virtual timer interrupt. However, this is already
done by the arch timer driver.To avoid code duplication, extend arch_timer_kvm_info to get the virtual
IRQ.Note that the KVM code will be modified in a subsequent patch.
Signed-off-by: Julien Grall
Acked-by: Christoffer Dall
Signed-off-by: Christoffer Dall -
Introduce a structure which are filled up by the arch timer driver and
used by the virtual timer in KVM.The first member of this structure will be the timecounter. More members
will be added later.A stub for the new helper isn't introduced because KVM requires the arch
timer for both ARM64 and ARM32.The function arch_timer_get_timecounter is kept for the time being and
will be dropped in a subsequent patch.Signed-off-by: Julien Grall
Acked-by: Christoffer Dall
Signed-off-by: Christoffer Dall
14 Dec, 2015
1 commit
-
Implement the timer save restore as a direct translation of
the assembly code version.Signed-off-by: Marc Zyngier
02 Jun, 2015
1 commit
-
The ARM Dual-Timer SP804 module is peripheral found not only on ARM32
platforms but also on ARM64 platforms.This patch moves the driver out of arch/arm to driver/clocksource
so that it can be used on ARM64 platforms also.Cc: Daniel Lezcano
Cc: Rob Herring
Cc: Arnd Bergmann
Cc: Catalin Marinas
Cc: Olof Johansson
Acked-by: Thomas Gleixner
Signed-off-by: Sudeep Holla
Signed-off-by: Russell King
31 Dec, 2014
1 commit
-
The timecounter code has almost nothing to do with the clocksource
code. Let it live in its own file. This will help isolate the
timecounter users from the clocksource users in the source tree.Signed-off-by: Richard Cochran
Acked-by: Jeff Kirsher
Signed-off-by: David S. Miller
23 Jul, 2014
1 commit
-
As clocksource pxa_timer was moved to clocksource framework, the
pxa_timer initialization needs to be a bit amended, to pass the
necessary informations to clocksource, ie :
- the timer interrupt (mach specific)
- the timer registers base (ditto)
- the timer clockrateSigned-off-by: Robert Jarzmik
Signed-off-by: Daniel Lezcano
26 Sep, 2013
2 commits
-
The ARM architected timer can generate events (used for waking up
CPUs executing the wfe instruction) at a frequency represented as a
power-of-2 divisor of the clock rate.An event stream might be used:
- To implement wfe-based timeouts for userspace locking implementations.
- To impose a timeout on a wfe for safeguarding against any programming
error in case an expected event is not generated.This patch computes the event stream frequency aiming for a period
of 100us between events. It uses ARM/ARM64 specific backends to configure
and enable the event stream.Cc: Lorenzo Pieralisi
Reviewed-by: Catalin Marinas
Acked-by: Olof Johansson
Signed-off-by: Will Deacon
[sudeep: moving ARM/ARM64 changes into separate patches
and adding Kconfig option]
Signed-off-by: Sudeep KarkadaNagesha -
Add macros to describe the bitfields in the ARM architected timer
control register to make code easy to understand.Reviewed-by: Lorenzo Pieralisi
Reviewed-by: Will Deacon
Acked-by: Catalin Marinas
Acked-by: Olof Johansson
Signed-off-by: Sudeep KarkadaNagesha
07 Sep, 2013
1 commit
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Pull ARM SoC cleanups from Olof Johansson:
"This branch contains code cleanups, moves and removals for 3.12.There's a large number of various cleanups, and a nice net removal of
13500 lines of code.Highlights worth mentioning are:
- A series of patches from Stephen Boyd removing the ARM local timer
API.
- Move of Qualcomm MSM IOMMU code to drivers/iommu.
- Samsung PWM driver cleanups from Tomasz Figa, removing legacy PWM
driver and switching over to the drivers/pwm one.
- Removal of some unusued auto-generated headers for OMAP2+ (PRM/CM).There's also a move of a header file out of include/linux/i2c/ to
platform_data, where it really belongs. It touches mostly ARM
platform code for include changes so we took it through our tree"* tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (83 commits)
ARM: OMAP2+: Add back the define for AM33XX_RST_GLOBAL_WARM_SW_MASK
gpio: (gpio-pca953x) move header to linux/platform_data/
arm: zynq: hotplug: Remove unreachable code
ARM: SAMSUNG: Remove unnecessary exynos4_default_sdhci*()
tegra: simplify use of devm_ioremap_resource
ARM: SAMSUNG: Remove plat/regs-timer.h header
ARM: SAMSUNG: Remove remaining uses of plat/regs-timer.h header
ARM: SAMSUNG: Remove pwm-clock infrastructure
ARM: SAMSUNG: Remove old PWM timer platform devices
pwm: Remove superseded pwm-samsung-legacy driver
ARM: SAMSUNG: Modify board files to use new PWM platform device
ARM: SAMSUNG: Rework private data handling in dev-backlight
pwm: Add new pwm-samsung driver
ARM: mach-mvebu: remove redundant DT parsing and validation
ARM: msm: Only compile io.c on platforms that use it
iommu/msm: Move mach includes to iommu directory
ARM: msm: Remove devices-iommu.c
ARM: msm: Move mach/board.h contents to common.h
ARM: msm: Migrate msm_timer to CLOCKSOURCE_OF_DECLARE
ARM: msm: Remove TMR and TMR0 static mappings
...
13 Aug, 2013
1 commit
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This patch introduces new Samsung PWM driver, which is completely
rewritten to be multiplatform- and DeviceTree-aware.In addition, remaining problems of old driver are fixed, such as:
- proper handling of hardware variants,
- synchronization on SMP systems,
- handling of boundary parameter values,
- hardware sharing with PWM clocksource driver,
- undefined state of PWM output after stopping PWM channel.Signed-off-by: Tomasz Figa
Reviewed-by: Sylwester Nawrocki
Tested-by: Heiko Stuebner
Tested-by: Mark Brown
Tested-by: Sylwester Nawrocki
Acked-by: Arnd Bergmann
Acked-by: Thierry Reding
