- 18 Dec, 2018 27 commits
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Thomas Gleixner authored
Merge branch 'clockevents/4.21' of http://git.linaro.org/people/daniel.lezcano/linux into timers/core Pull clocksource/event changes from Daniel Lezcano: - Add the sched_clock for the arc timer (Alexey Brodkin) - Change the file timer names for riscv, rockchip, tegra20, sun4i and meson6 (Daniel Lezcano) - Add the DT bindings for r8a7796, r8a77470 and r8a774a1 (Biju Das) - Remove the early platform driver registration for timer-ti-dm (Bartosz Golaszewski) - Provide the sched_clock for the riscv timer (Anup Patel) - Add support for ARM64 for the imx-gpt and convert the imx-tpm to the timer-of API (Anson Huang) - Remove useless irq protection for the imx-gpt (Clément Péron) - Remove a duplicate function name for the vt8500 (Dan Carpenter) - Remove obsolete inclusion of <asm/smp_twd.h> for the tegra20 (Geert Uytterhoeven) - Demote the prcmu and the custom sched_clock for the dbx500 and the ux500 (Linus Walleij) - Add a new timer clock for the RDA8810PL (Manivannan Sadhasivam) - Rename the macro to stick to the register name and add the delay timer (Martin Blumenstingl) - Switch the bcm2835 to the SPDX identifier (Stefan Wahren) - Fix the interrupt register access on the fttmr010 (Tao Ren) - Add missing of_node_put in the initialization path on the integrator-ap (Yangtao Li)
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Manivannan Sadhasivam authored
Add clock driver for RDA Micro RDA8810PL SoC supporting OSTIMER and HWTIMER. RDA8810PL has two independent timers: OSTIMER (56 bit) and HWTIMER (64 bit). Each timer provides optional interrupt support. In this driver, OSTIMER is used for clockevents and HWTIMER is used for clocksource. Signed-off-by:
Andreas Färber <afaerber@suse.de> Signed-off-by:
Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by:
Daniel Lezcano <daniel.lezcano@linaro.org>
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Daniel Lezcano authored
In order to unify the names in this directory, let's rename the driver to be prefixed with timer-* Signed-off-by: -
Daniel Lezcano authored
In order to unify the names in this directory, let's rename the driver to be prefixed with timer-* Signed-off-by: -
Daniel Lezcano authored
In order to unify the names in this directory, let's rename the driver to be prefixed with timer-* Signed-off-by: -
Daniel Lezcano authored
In order to unify the names in this directory, let's rename the driver to be prefixed with timer-* Signed-off-by: -
Daniel Lezcano authored
In order to unify the names in this directory, let's rename the driver to be prefixed with timer-* Reviewed-by:
Palmer Dabbelt <palmer@sifive.com> Signed-off-by:
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Anup Patel authored
Currently, we don't have a sched_clock registered for RISC-V systems. This means Linux time keeping will use jiffies (running at HZ) as the default sched_clock. To avoid this, we explicity provide sched_clock using RISC-V rdtime instruction (similar to riscv_timer clocksource). Signed-off-by:
Anup Patel <anup@brainfault.org> Reviewed-by:
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Anson Huang authored
i.MX TPM needs "ipg" clock for register access and "per" clock for timer function, the driver gets "ipg" clock by searching the clock name, but timer-of initialization will get first clock in device tree TPM node since no clock name specified in of_clk, that means the "per" clock MUST be the first clock entry in device tree TPM node, this patch specifies clock name for of_clk to avoid this restriction, it makes TPM driver work properly with different sequence of clock entries in device tree TPM node. Signed-off-by:
Anson Huang <Anson.Huang@nxp.com> Signed-off-by:
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Tao Ren authored
TIMER_INTR_MASK register (Base Address of Timer + 0x38) is not designed for masking interrupts on ast2500 chips, and it's not even listed in ast2400 datasheet, so it's not safe to access TIMER_INTR_MASK on aspeed chips. Similarly, TIMER_INTR_STATE register (Base Address of Timer + 0x34) is not interrupt status register on ast2400 and ast2500 chips. Although there is no side effect to reset the register in fttmr010_common_init(), it's just misleading to do so. Besides, "count_down" is renamed to "is_aspeed" in "fttmr010" structure, and more comments are added so the code is more readble. Signed-off-by:
Tao Ren <taoren@fb.com> Reviewed-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Yangtao Li authored
The function of_find_node_by_path() acquires a reference to the node returned by it and that reference needs to be dropped by its caller. integrator_ap_timer_init_of() doesn't do that. The pri_node and the sec_node are used as an identifier to compare against the current node, so we can directly drop the refcount after getting the node from the path as it is not used as pointer. By dropping the refcount right after getting it, a single variable is needed instead of two. Fix this by use a single variable and drop the refcount right after of_find_node_by_path(). Signed-off-by:
Yangtao Li <tiny.windzz@gmail.com> Signed-off-by:
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Stefan Wahren authored
Adopt the SPDX license identifier headers to ease license compliance management. Also drop the FSF address. Cc: Simon Arlott <simon@arlott.org> Signed-off-by:
Stefan Wahren <stefan.wahren@i2se.com> Reviewed-by:
Eric Anholt <eric@anholt.net> Acked-by:
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Biju Das authored
Document SoC specific bindings for RZ/G2M (r8a774a1) SoC. Signed-off-by:
Biju Das <biju.das@bp.renesas.com> Reviewed-by:
Simon Horman <horms+renesas@verge.net.au> Signed-off-by:
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Anson Huang authored
Convert the driver to use the timer_of helpers. This allows to handle timer base, clock and irq using common timer_of driver and it simplifies the code. Signed-off-by:
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Alexey Brodkin authored
It turned out we used to use default implementation of sched_clock() from kernel/sched/clock.c which was as precise as 1/HZ, i.e. by default we had 10 msec granularity of time measurement. Now given ARC built-in timers are clocked with the same frequency as CPU cores we may get much higher precision of time tracking. Thus we switch to generic sched_clock which really reads ARC hardware counters. This is especially helpful for measuring short events. That's what we used to have: ------------------------------>8------------------------ $ perf stat /bin/sh -c /root/lmbench-master/bin/arc/hello > /dev/null Performance counter stats for '/bin/sh -c /root/lmbench-master/bin/arc/hello': 10.000000 task-clock (msec) # 2.832 CPUs utilized 1 context-switches # 0.100 K/sec 1 cpu-migrations # 0.100 K/sec 63 page-faults # 0.006 M/sec 3049480 cycles # 0.305 GHz 1091259 instructions # 0.36 insn per cycle 256828 branches # 25.683 M/sec 27026 branch-misses # 10.52% of all branches 0.003530687 seconds time elapsed 0.000000000 seconds user 0.010000000 seconds sys ------------------------------>8------------------------ And now we'll see: ------------------------------>8------------------------ $ perf stat /bin/sh -c /root/lmbench-master/bin/arc/hello > /dev/null Performance counter stats for '/bin/sh -c /root/lmbench-master/bin/arc/hello': 3.004322 task-clock (msec) # 0.865 CPUs utilized 1 context-switches # 0.333 K/sec 1 cpu-migrations # 0.333 K/sec 63 page-faults # 0.021 M/sec 2986734 cycles # 0.994 GHz 1087466 instructions # 0.36 insn per cycle 255209 branches # 84.947 M/sec 26002 branch-misses # 10.19% of all branches 0.003474829 seconds time elapsed 0.003519000 seconds user 0.000000000 seconds sys ------------------------------>8------------------------ Note how much more meaningful is the second output - time spent for execution pretty much matches number of cycles spent (we're runnign @ 1GHz here). Signed-off-by:Alexey Brodkin <abrodkin@synopsys.com> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Acked-by:
Vineet Gupta <vgupta@synopsys.com> Signed-off-by:
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Biju Das authored
Document SoC specific compatible strings for r8a77470. No driver change is needed as the fallback strings will activate the right code. Signed-off-by:
Fabrizio Castro <fabrizio.castro@bp.renesas.com> Reviewed-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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Biju Das authored
Document SoC specific bindings for R-Car M3-W (r8a7796) SoC. Signed-off-by:
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Clément Péron authored
shutdown and oneshot are already protected against irq interruptions Signed-off-by:
Clément Péron <peron.clem@gmail.com> Signed-off-by:
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Anson Huang authored
This patch allows building and compile-testing the i.MX GPT driver also for ARM64. The delay_timer is only supported on ARMv7. Signed-off-by:
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Martin Blumenstingl authored
Implement an ARM delay timer to be used for udelay(). This allows us to skip the delay loop calibration at boot. With this patch udelay() is now independent of CPU frequency changes. This is a good thing on Meson8, Meson8b and Meson8m2 because changing the CPU frequency requires running the CPU clock off the XTAL while changing the PLL or it's dividers. After changing the CPU clocks we need to wait a few usecs for the clock to become stable. So having an udelay() implementation that doesn't depend on the CPU frequency is beneficial. Suggested-by:
Jianxin Pan <jianxin.pan@amlogic.com> Signed-off-by:
Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by:
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Martin Blumenstingl authored
This makes the driver use the names from S805 datasheet for the preprocessor #defines. This makes it easier to spot that the driver currently only supports Timer A (as clockevent with interrupt support) and Timer E (as clocksource without interrupts). Timer B, C and D (which are similar to Timer A) are currently not supported by the driver. While here, this also removes the internal "CED_ID" and "CSD_ID" defines which are used to identify the timer. These IDs are not described in the datasheet and thus make it harder to compare the code to what's written in the datasheet. Signed-off-by:
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Geert Uytterhoeven authored
As of commit da4a686a ("ARM: smp_twd: convert to use CLKSRC_OF init"), this header file is no longer used. Signed-off-by:
Geert Uytterhoeven <geert+renesas@glider.be> Acked-by:
Thierry Reding <treding@nvidia.com> Signed-off-by:
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Bartosz Golaszewski authored
This driver is no longer used as an early platform driver. Remove the registration macro. Signed-off-by:
Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by:
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Linus Walleij authored
The two drivers used for Ux500 sched_clock use two Kconfig symbols to select which of the two gets used as sched_clock. This isn't right: the workaround is trying to make sure that the NONSTOP timer is used for sched_clock in order to keep that clock ticking consistently over a suspend/resume cycle. (Otherwise sched_clock simply stops during suspend and continues after resume). This will notably affect any timetstamped debug prints, so that they show the absolute number of seconds since the system was booted and does not loose wall-clock time during suspend and resume as if time stood still. The real way to fix this problem is to make sched_clock take advantage of any NONSTOP clock source on the system and adjust accordingly, not to try to work around this by using a different sched_clock depending on what system we are compiling for. This can solve the problem for everyone instead of providing a local solution. Cc: Baolin Wang <baolin.wang@linaro.org> Signed-off-by:
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Linus Walleij authored
Demote the DBx500 PRCMU clocksource to quality 100 and mark it as NONSTOP so it will still be used for timekeeping across suspend/resume. The Nomadik MTU timer which has higher precision will be used when the system is up and running, thanks to the recent changes properly utilizing the suspend clocksources. This was discussed back in 2011 when the driver was written, but the infrastructure was not available upstream to use this timer properly. Now the infrastructure is there, so let's finalize the work. Cc: Baolin Wang <baolin.wang@linaro.org> Signed-off-by:
Baolin Wang <baolin.wang@linaro.org> Signed-off-by:
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Dan Carpenter authored
We print the function name twice in a row in the error message so I've removed one. Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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YueHaibing authored
Signed-off-by:
YueHaibing <yuehaibing@huawei.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: <john.stultz@linaro.org> Cc: <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20181209062225.4344-1-yuehaibing@huawei.com
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- 12 Dec, 2018 1 commit
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Yangtao Li authored
Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code. Signed-off-by:
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- 05 Dec, 2018 1 commit
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Bart Van Assche authored
tk_core.seq is initialized open coded, but that misses to initialize the lockdep map when lockdep is enabled. Lockdep splats involving tk_core seq consequently lack a name and are hard to read. Use the proper initializer which takes care of the lockdep map initialization. [ tglx: Massaged changelog ] Signed-off-by:
Bart Van Assche <bvanassche@acm.org> Signed-off-by:
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- 23 Nov, 2018 9 commits
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Thomas Gleixner authored
The SPDX identifier defines the license of the file already. No need for the boilerplate. Remove also the completely outdated Montavista snail mail address. Signed-off-by:
Kees Cook <keescook@chromium.org> Acked-by:
Ingo Molnar <mingo@kernel.org> Acked-by:
John Stultz <john.stultz@linaro.org> Acked-by:
Corey Minyard <cminyard@mvista.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Cc: Peter Anvin <hpa@zytor.com> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Richard Cochran <richardcochran@gmail.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Nicolas Pitre <nicolas.pitre@linaro.org> Cc: David Riley <davidriley@chromium.org> Cc: Colin Cross <ccross@android.com> Cc: Mark Brown <broonie@kernel.org> Link: https://lkml.kernel.org/r/20181031182253.479792883@linutronix.de
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Thomas Gleixner authored
The SPDX identifier defines the license of the file already. No need for the boilerplate. Signed-off-by:
Richard Cochran <richardcochran@gmail.com> Acked-by:
Manfred Rudigier <manfred.rudigier@omicronenergy.com> Acked-by:
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Thomas Gleixner authored
The SPDX identifier defines the license of the file already. No need for the boilerplate. Signed-off-by:
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Thomas Gleixner authored
The SPDX identifier defines the license of the file already. No need for the boilerplate. Signed-off-by:
Nicolas Pitre <nico@linaro.org> Acked-by:
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Thomas Gleixner authored
The SPDX identifier defines the license of the files already. No need for the boilerplates. Signed-off-by:
Paul E. McKenney <paulmck@linux.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Cc: Peter Anvin <hpa@zytor.com> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Nicolas Pitre <nicolas.pitre@linaro.org> Cc: David Riley <davidriley@chromium.org> Cc: Colin Cross <ccross@android.com> Cc: Mark Brown <broonie@kernel.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Link: https://lkml.kernel.org/r/20181031182253.132458951@linutronix.de
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Thomas Gleixner authored
The SPDX identifier is enough. Remove the license boilerplate. Signed-off-by:
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Thomas Gleixner authored
"For licencing details see kernel-base/COPYING" and similar license references have no value over the SPDX identifier. Remove them. Signed-off-by:
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Thomas Gleixner authored
Update the time(r) core files files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Philippe Ombredanne, Kate Stewart and myself. The data has been created with two independent license scanners and manual inspection. The following files do not contain any direct license information and have been omitted from the big initial SPDX changes: timeconst.bc: The .bc files were not touched time.c, timer.c, timekeeping.c: Licence was deduced from EXPORT_SYMBOL_GPL As those files do not contain direct license references they fall under the project license, i.e. GPL V2 only. Signed-off-by:
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Thomas Gleixner authored
Remove the pointless filenames in the top level comments. They have no value at all and just occupy space. While at it tidy up some of the comments and remove a stale one. Signed-off-by:
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- 05 Nov, 2018 1 commit
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Yangtao Li authored
WARN_ON() and WARN_ON_ONCE() already contains an unlikely(), so it's not necessary to use unlikely. Signed-off-by:
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- 04 Nov, 2018 1 commit
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Linus Torvalds authored
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