We should get 'driver_data' from 'struct device' directly. Going via
platform_device is an unneeded step back and forth.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Notice that in this particular case, I replaced "Fall" with a proper
"Fall through" comment.
Addresses-Coverity-ID: 1373875 ("Missing break in switch")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Instead of confusingly returning -EBUSY on failure to obtain an
interrupt, propagate the real error code. While at it, let the user know
why the interrupt could not be acquired.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Fix a problem with commit 311ee9c151 ("rtc: cmos: allow using ACPI for
RTC alarm instead of HPET") defining `use_acpi_alarm' module parameter
even for non-ACPI platforms, which ignore it. Wrap the definition into
#ifdef CONFIG_ACPI and use a static inline wrapper function, hardcoded
to return 0 and consequently optimized away for !ACPI, following the
existing pattern with HPET handling functions.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Fixes: 311ee9c151 ("rtc: cmos: allow using ACPI for RTC alarm instead of HPET")
Cc: stable@vger.kernel.org # 4.18+
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Fix a commit 311ee9c151 ("rtc: cmos: allow using ACPI for RTC alarm
instead of HPET") `rtc-cmos' regression causing a link error:
drivers/rtc/rtc-cmos.o: In function `cmos_platform_probe':
rtc-cmos.c:(.init.text+0x33c): undefined reference to `hpet_rtc_interrupt'
rtc-cmos.c:(.init.text+0x3f4): undefined reference to `hpet_rtc_interrupt'
with non-ACPI platforms using this driver. The cause is the change of
the condition guarding the use of `hpet_rtc_interrupt'.
Previously it was a call to `is_hpet_enabled'. That function is static
inline and has a hardcoded 0 result for non-ACPI platforms, which imply
!HPET_EMULATE_RTC. Consequently the compiler optimized the whole block
away including the reference to `hpet_rtc_interrupt', which never made
it to the link stage.
Now the guarding condition is a call to `use_hpet_alarm', which is not
static inline and therefore the compiler may not be able to prove that
it actually always returns 0 for non-ACPI platforms. Consequently the
build breaks with an unsatisfied reference, because `hpet_rtc_interrupt'
is nowhere defined at link time.
Fix the problem by marking `use_hpet_alarm' inline. As the `inline'
keyword serves as an optimization hint rather than a requirement the
compiler is still free to choose whether inlining will be beneficial or
not for ACPI platforms.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Fixes: 311ee9c151 ("rtc: cmos: allow using ACPI for RTC alarm instead of HPET")
Cc: stable@vger.kernel.org # 4.18+
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Instead of lying to the core when the alarm is invalid, let it handle that
by returning the error.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Tested-by: Gregory CLEMENT <gregory.clement@bootlin.com> (on Armada 375 DB)
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Call the 64bit versions of rtc_time_to_tm now that the range is enforced by
the core.
Also remove the open coded rtc_tm_to_time64.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
rtc_time_to_tm always rturns a valid tm, there is no need to validate it.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Let the core handle offsetting and windowing the RTC range.
The RTC has a 24 bit counter for minutes plus a seconds counter.
Keep the epoch at the beginning of 2000.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Use rtc_add_group to add the sysfs group in a race free manner.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Instead of resetting the RTC to an bogus valid time, let userspace know
that the time is invalid when XSTP is set. Reset XSTP when setting the time
again.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
The name passed to devm_rtc_device_register is now unused. anyway, switch
to devm_rtc_allocate_device to avoid forward declaring rs5c348_driver.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Call the 64bit versions of rtc_time_to_tm and rtc_tm_to_time now that the
range is enforced by the core.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
The IRQ is requested before the struct rtc is allocated and registered, but
this struct is used in the IRQ handler. This may lead to a NULL pointer
dereference.
Switch to devm_rtc_allocate_device/rtc_register_device to allocate the rtc
before requesting the IRQ.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Register frequency test using rtc_add_group to avoid a possible race
condition and simplify the code.
This also moves the attribute to its proper location under the rtc device
instead of the i2c parent device.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Instead of adding a binary sysfs attribute from the driver, use the core to
register an nvmem device.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
/proc is not the correct ABI to display debugging info. Remove
RTC_DS1685_PROC_REGS as the driver hasn't seen any real development since
it was included.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
The license text is specifying GPL v2 only but the MODULE_LICENSE is set to
GPL which means GNU Public License v2 or later. When MODULE_LICENSE and
boiler plate does not match, go for boiler plate license.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
The default word_size and stride of 1 are correct for the tx4939. Also fix
the nvmem folder name.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
The core header file is reserved for the core, stop including it.
Also reorder includes alphabetically.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Move rtc_add_group and rtc_add_groups definition to rtc.h that is available
for all RTC drivers.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
On m41txx you can enable open-drain OUT pin to check if offset is ok.
Enabling OUT pin with frequency_test_enable attribute, OUT pin will tick
512 times faster than 1s tick base.
Enable or Disable FT bit on CONTROL register if freq_test is 1 or 0.
Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
m41txx chips can hold a calibration value to get correct clock bias.
Add offset handling (ranging between -63ppm and 126ppm) via sysfs.
Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Use rtc_add_group to add the common sysfs group to avoid a possible race
condition.
[Denis.Osterland@diehl.com: use to_i2c_client(dev->parent)]
Signed-off-by: Denis Osterland <Denis.Osterland@diehl.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
The move of atrim, dtrim usr sysfs properties from i2c device
to rtc device require to access them via dev->parent.
This patch also aligns timestamp0.
Stale mentions of irq_task are left in the kerneldoc after its removal.
Remove them.
There is still one indirect mention left but commit 3c8bb90efb ("rtc: Fix
hrtimer deadlock") can probably be reverted now.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Ensure the non managed version of the un/registration functions is not used
anymore. No driver is using it anymore and they should not be necessary.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
The abx804 and abx805 chips have support for a simple watchdog
function that can trigger an external reset.
Signed-off-by: Jeremy Gebben <jgebben@sweptlaser.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This will allow additional data to be tracked, for future
improvements.
Signed-off-by: Jeremy Gebben <jgebben@sweptlaser.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Switch to devm_rtc_allocate_device to simplify the erro and driver removal
paths.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
The IRQ is requested before the struct rtc is allocated and registered, but
this struct is used in the IRQ handler. This may lead to a NULL pointer
dereference.
Switch to devm_rtc_allocate_device/rtc_register_device to allocate the rtc
before requesting the IRQ.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
The IRQ is requested before the struct rtc is allocated and registered, but
this struct is used in the IRQ handler. This may lead to a NULL pointer
dereference.
Switch to devm_rtc_allocate_device/rtc_register_device to allocate the rtc
before requesting the IRQ.
Acked-by: Eddie Huang <eddie.huang@mediatek.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Fixes gcc '-Wunused-but-set-variable' warning:
drivers/rtc/rtc-mrst.c: In function 'mrst_procfs':
drivers/rtc/rtc-mrst.c:264:29: warning:
variable 'valid' set but not used [-Wunused-but-set-variable]
unsigned char rtc_control, valid;
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
The Epson rx8803 is mostly similar to the Microcrystal RV8803 but the size
of the offset register is 4 bits vs 6 bits but it has a configurable
temperature compensation.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
devm_kcalloc() returns NULL, it never returns error pointers. In the
current code we would return PTR_ERR(NULL) which is success, instead of
returning the -ENOMEM error code.
Fixes: a0a1a1ba30 ("rtc: sysfs: facilitate attribute add to rtc device")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
One of the more common cases of allocation size calculations is finding
the size of a structure that has a zero-sized array at the end, along
with memory for some number of elements for that array. For example:
struct foo {
int stuff;
void *entry[];
};
instance = kzalloc(sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL);
Instead of leaving these open-coded and prone to type mistakes, we can
now use the new struct_size() helper:
instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL);
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Depending on MACH_INGENIC prevent us from creating a generic kernel that
works on more than one MIPS board. Instead, we just depend on MIPS being
set.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cut down the shutdown time from 2 seconds to 1 sec. In case of roll
over try again.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Use of_device_is_system_power_controller instead of manually reading
the system-power-controller property from the device tree node.
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
mrst_read_time() is never called in atomic context.
It calls mdelay() to busily wait, which is not necessary.
mdelay() can be replaced with msleep().
This is found by a static analysis tool named DCNS written by myself.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Subsystem:
- new helpers to add custom sysfs attributes
- struct rtc_task removal along with rtc_irq_register/rtc_irq_unregister
- rtc_irq_set_state and rtc_irq_set_freq are not exported anymore
Drivers:
- armada38x: reset after rtc power loss
- ds1307: now supports m41t11
- isl1208: now supports isl1219 and tamper detection
- pcf2127: internal SRAM support
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Merge tag 'rtc-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni:
"It is now possible to add custom sysfs attributes while avoiding a
possible race condition. Unused code has been removed resulting in a
nice reduction of the code base. And more drivers have been switched
to SPDX by their maintainers.
Summary:
Subsystem:
- new helpers to add custom sysfs attributes
- struct rtc_task removal along with rtc_irq_[un]register()
- rtc_irq_set_state and rtc_irq_set_freq are not exported anymore
Drivers:
- armada38x: reset after rtc power loss
- ds1307: now supports m41t11
- isl1208: now supports isl1219 and tamper detection
- pcf2127: internal SRAM support"
* tag 'rtc-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (34 commits)
rtc: ds1307: simplify hwmon config
rtc: s5m: Add SPDX license identifier
rtc: maxim: Add SPDX license identifiers
rtc: isl1219: add device tree documentation
rtc: isl1208: set ev-evienb bit from device tree
rtc: isl1208: Add "evdet" interrupt source for isl1219
rtc: isl1208: add support for isl1219 with tamper detection
rtc: sysfs: facilitate attribute add to rtc device
rtc: remove struct rtc_task
char: rtc: remove task handling
rtc: pcf85063: preserve control register value between stop and start
rtc: sh: remove unused variable rtc_dev
rtc: unexport rtc_irq_set_*
rtc: simplify rtc_irq_set_state/rtc_irq_set_freq
rtc: remove irq_task and irq_task_lock
rtc: remove rtc_irq_register/rtc_irq_unregister
rtc: sh: remove dead code
rtc: sa1100: don't set PIE frequency
rtc: ds1307: support m41t11 variant
rtc: ds1307: fix data pointer to m41t0
...
We don't have to define an extra config symbol, IS_REACHABLE does
what we need. And having this config symbol just to save the few
bytes of hwmon support on non-DS3231 chips isn't worth it IMO
(especially as the symbol is set per default).
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
