Some RTCs, e.g. the pcf2127, can be used as a hardware watchdog. But
if the reset pin is not actually wired up, the driver exposes a
watchdog device that doesn't actually work.
Provide a standard binding that can be used to indicate that a given
RTC can perform a reset of the machine, similar to wakeup-source.
Suggested-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201218101054.25416-2-rasmus.villemoes@prevas.dk
Since the rtc_register_device, removing an RTC device will end with a
refcount_t: underflow; use-after-free warning since put_device is called
twice in the device tear down path.
Fixes: fdcfd85433 ("rtc: rework rtc_register_device() resource management")
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20201205231449.610980-1-alexandre.belloni@bootlin.com
Support for periodic tick interrupts has been moved from the RTC class to
the HR-timers long time ago. Then it has been removed from this driver by
commits 80d4bb515b ("RTC: Cleanup rtc_class_ops->irq_set_state") and
696160fec1 ("RTC: Cleanup rtc_class_ops->irq_set_freq()"). They however
did not remove all the code related to the tick handling. Do it now then.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201202111318.5353-2-m.szyprowski@samsung.com
Bootloader might use RTC hardware and leave it in the enabled state. Ensure
that the potentially enabled periodic tick interrupts are disabled before
enabling the driver, because they might cause lockup if tick interrupt
happens after disabling RTC gate clock.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201202111318.5353-1-m.szyprowski@samsung.com
There's no real reason it should be disabled, and at least we can
use it for development & testing with the RTC test driver.
However, two devices are missing a HAS_IOMEM dependency, so add
that to avoid build failures from e.g. allyesconfig.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201120211103.6895ac740d11.Ic19a9926e8e4c70c03329e55f9e5b1d45095b904@changeid
Not destroying mutexes doesn't lead to resource leak but it's the correct
thing to do for mutex debugging accounting.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201110094205.8972-1-brgl@bgdev.pl
We don't need to use devres_alloc() & devres_add() manually if all we
want to manage is a single pointer. We can shrink the code by using
devm_add_action_or_reset() instead. The number of allocations stays
the same.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201109163409.24301-9-brgl@bgdev.pl
rtc_register_device() is a managed interface but it doesn't use devres
by itself - instead it marks an rtc_device as "registered" and the devres
callback for devm_rtc_allocate_device() takes care of resource release.
This doesn't correspond with the design behind devres where managed
structures should not be aware of being managed. The correct solution
here is to register a separate devres callback for unregistering the
device.
While at it: rename rtc_register_device() to devm_rtc_register_device()
and add it to the list of managed interfaces in devres.rst. This way we
can avoid any potential confusion of driver developers who may expect
there to exist a corresponding unregister function.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201109163409.24301-8-brgl@bgdev.pl
Some users check the return value of devm_rtc_nvmem_register() only in
order to emit an error message and then continue probing. This is fine
as an rtc can function without exposing nvmem but let's generalize it:
let's make the registration function emit the error message so that
users don't have to.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201109163409.24301-7-brgl@bgdev.pl
rtc_nvmem_register() is a managed interface. It doesn't require any
release function to be called at driver detach. To avoid confusing
driver authors, let's rename it to devm_rtc_nvmem_register() and add it
to the list of managed interfaces in Documentation/.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201109163409.24301-6-brgl@bgdev.pl
The nvram sysfs attributes have been deprecated at least since v4.13, more
than 3 years ago and nobody ever complained about the deprecation warning.
Remove the sysfs attributes now.
[Bartosz: remove the declaration of rtc_nvmem_unregister()]
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20201109163409.24301-5-brgl@bgdev.pl
Use a managed variant of pinctrl_register(). This way we can shorten
the remove() callback as well as drop a goto label from probe().
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201109163409.24301-2-brgl@bgdev.pl
The RTC core only reads the alarm from the hardware at boot time, to know
whether an alarm was already set before booting. It keeps track of all the
alarms after that so there is no need to ever read the auxiliary alarm.
Commit 3822d1bb0d ("rtc: sc27xx: Always read normal alarm when
registering RTC device") already effectively removed the capability to read
the auxiliary alarm as .read_alarm is always called with rtc->registered set
to false.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Chunyan Zhang <zhang.lyra@gmail.com>
Link: https://lore.kernel.org/r/20201117212201.1288608-1-alexandre.belloni@bootlin.com
Since 5.10-rc1 i.MX is a devicetree-only platform, so simplify the code
by removing the unused non-DT support.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201116180326.5199-1-festevam@gmail.com
The RX6110 also supports I2C, so this patch adds support for it to the
driver.
This also renames the SPI specific functions and variables to include
`_spi_` in their names.
Signed-off-by: Claudius Heine <ch@denx.de>
Signed-off-by: Henning Schild <henning.schild@siemens.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201117121817.953924-3-ch@denx.de
The help message in the Kconfig for the RX-6110 erronously stated
RX-6610.
Signed-off-by: Claudius Heine <ch@denx.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201117121817.953924-2-ch@denx.de
These prevent use of this driver with ACPI via PRP0001.
Drop them to remove this restriction.
Also added mod_devicetable.h include given use of struct of_device_id.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201116142859.31257-3-andriy.shevchenko@linux.intel.com
Device property API allows to gather device resources from different sources,
such as ACPI. Convert the drivers to unleash the power of device property API.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201116142859.31257-2-andriy.shevchenko@linux.intel.com
The commit 9c19b8930d ("rtc: ds1307: Add ACPI support") added invalid
ACPI IDs (all of them are abusing ACPI specification). Moreover there is
not even a single evidence that vendor registered any of such devices.
Remove broken ACPI IDs from the driver. For prototyping one may use PRP0001
with device properties adhering to a DT binding. The following patches
will add support of that to the driver.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Tin Huynh <tnhuynh@apm.com>
Link: https://uefi.org/PNP_ACPI_Registry
Link: https://lore.kernel.org/r/20201116142859.31257-1-andriy.shevchenko@linux.intel.com
Handle the sam9x60 RTC. While it can work with the at91sam9x5 fallback, it
has crystal correction support and doesn't need to shadow IMR.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20201117133920.1229679-1-alexandre.belloni@bootlin.com
Goldfish platform is covered with dust.
However the goldfish-rtc had been used as virtualized RTC
in QEMU for RISC-V virt hw and MIPS loongson3-virt hw, thus
we can drop other parts of goldfish but leave goldfish-rtc here.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201114130921.651882-2-jiaxun.yang@flygoat.com
Because clk_* already checked NULL clock parameter,
so the additional checks are unnecessary, just remove them.
Signed-off-by: Xu Wang <vulab@iscas.ac.cn>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201113080305.65961-1-vulab@iscas.ac.cn
Because clk_disable_unprepare() already checked NULL clock parameter,
so the additional check is unnecessary, just remove it.
Signed-off-by: Xu Wang <vulab@iscas.ac.cn>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20201113074538.65028-1-vulab@iscas.ac.cn
When devm_rtc_allocate_device is failed in pl031_probe, it should release
mem regions with device.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zheng Liang <zhengliang6@huawei.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201112093139.32566-1-zhengliang6@huawei.com
Coccinelle noticed:
drivers/rtc/rtc-cpcap.c:271:7-32: ERROR: Threaded IRQ with no
primary handler requested without IRQF_ONESHOT
drivers/rtc/rtc-cpcap.c:287:7-32: ERROR: Threaded IRQ with no
primary handler requested without IRQF_ONESHOT
Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1605000947-32882-1-git-send-email-tiantao6@hisilicon.com
Enable wakeup in the hym8563 driver if the IRQ was successfully
requested or if wakeup-source is set in the devicetree.
As per the description of device_init_wakeup(), it should be enabled
for "devices that everyone expects to be wakeup sources". One would
expect this to be the case with a real-time clock.
Tested on rk3288-rock2-square, which has an IRQ configured for the
RTC. As a result, wakeup was enabled during driver initialisation.
Fixes: dcaf038493 ("rtc: add hym8563 rtc-driver")
Reported-by: kernelci.org bot <bot@kernelci.org>
Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1ea023e2ba50a4dab6e39be93d7de3146af71a60.1604653374.git.guillaume.tucker@collabora.com
Here we could use the '!=' expression to fix the following coccicheck
warning:
./drivers/rtc/rtc-sc27xx.c:566:50-55: WARNING: conversion to bool not needed here
Reported-by: Tosk Robot <tencent_os_robot@tencent.com>
Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1604647854-876-1-git-send-email-kaixuxia@tencent.com
When clk_hw_register_fixed_rate_with_accuracy() fails,
clk_data should be freed. It's the same for the subsequent
two error paths, but we should also unregister the already
registered clocks in them.
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201020061226.6572-1-dinghao.liu@zju.edu.cn
These functions should return zero on success. Non-zero returns are
treated as error. On some paths, this doesn't matter but in
nvmem_cell_read() a non-zero return would be passed to ERR_PTR() and
lead to an Oops.
Fixes: d6c3029f32 ("rtc: pcf2127: add support for accessing internal static RAM")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201022070451.GA2817669@mwanda
The obvious advantages are:
- The linker can drop the watchdog functions if CONFIG_WATCHDOG is off.
- All watchdog stuff grouped together with only a single function call
left in generic code.
- Watchdog register is only read when it is actually used.
- Less #ifdefery
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20200924105256.18162-2-u.kleine-koenig@pengutronix.de
Use a more generic form for __section that requires quotes to avoid
complications with clang and gcc differences.
Remove the quote operator # from compiler_attributes.h __section macro.
Convert all unquoted __section(foo) uses to quoted __section("foo").
Also convert __attribute__((section("foo"))) uses to __section("foo")
even if the __attribute__ has multiple list entry forms.
Conversion done using the script at:
https://lore.kernel.org/lkml/75393e5ddc272dc7403de74d645e6c6e0f4e70eb.camel@perches.com/2-convert_section.pl
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@gooogle.com>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
tid_addr is not a "pointer to (pointer to int in userspace)"; it is in
fact a "pointer to (pointer to int in userspace) in userspace". So
sparse rightfully complains about passing a kernel pointer to
put_user().
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 453431a549 ("mm, treewide: rename kzfree() to
kfree_sensitive()") renamed kzfree() to kfree_sensitive(),
but it left a compatibility definition of kzfree() to avoid
being too disruptive.
Since then a few more instances of kzfree() have slipped in.
Just get rid of them and remove the compatibility definition
once and for all.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If set, use the environment variable GIT_DIR to change the default .git
location of the kernel git tree.
If GIT_DIR is unset, keep using the current ".git" default.
Link: https://lkml.kernel.org/r/c5e23b45562373d632fccb8bc04e563abba4dd1d.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
which are based on CLOCK_MONOTONIC require time namespace corrected. This
was missed in the original time namesapce support.
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Merge tag 'timers-urgent-2020-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner:
"A time namespace fix and a matching selftest. The futex absolute
timeouts which are based on CLOCK_MONOTONIC require time namespace
corrected. This was missed in the original time namesapce support"
* tag 'timers-urgent-2020-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
selftests/timens: Add a test for futex()
futex: Adjust absolute futex timeouts with per time namespace offset
- A trivial build fix for sched_feat() to compile correctly with
CONFIG_JUMP_LABEL=n
- Replace a zero lenght array with a flexible array.
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Merge tag 'sched-urgent-2020-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Thomas Gleixner:
"Two scheduler fixes:
- A trivial build fix for sched_feat() to compile correctly with
CONFIG_JUMP_LABEL=n
- Replace a zero lenght array with a flexible array"
* tag 'sched-urgent-2020-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/features: Fix !CONFIG_JUMP_LABEL case
sched: Replace zero-length array with flexible-array
source bitmask of perf events correctly.
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Merge tag 'perf-urgent-2020-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fix from Thomas Gleixner:
"A single fix to compute the field offset of the SNOOPX bit in the data
source bitmask of perf events correctly"
* tag 'perf-urgent-2020-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf: correct SNOOPX field offset
Rasmus Villemoes