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path: root/drivers/rtc
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2018-10-25rtc: sc27xx: Clear SPG value update interrupt statusBaolin Wang1-1/+2
We should clear the SPG value update interrupt status once the SPG value is updated successfully, in case incorrect status validation for next time. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-10-25rtc: sc27xx: Set wakeup capability before registering rtc deviceBaolin Wang1-1/+3
Set wakeup capability before registering rtc device, in case the alarmtimer can find one available rtc device. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-10-22rtc: s35390a: Change buf's type to u8 in s35390a_initNathan Chancellor1-1/+1
Clang warns: drivers/rtc/rtc-s35390a.c:124:27: warning: implicit conversion from 'int' to 'char' changes value from 192 to -64 [-Wconstant-conversion] buf = S35390A_FLAG_RESET | S35390A_FLAG_24H; ~ ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~ 1 warning generated. Update buf to be an unsigned 8-bit integer, which matches the buf member in struct i2c_msg. https://github.com/ClangBuiltLinux/linux/issues/145 Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-10-22rtc: ds1307: fix ds1339 wakealarm supportSoeren Moch1-1/+0
Commit 51ed73eb998a1c79a2b0e9bed68f75a8a2c93b9b ("rtc: ds1340: Add support for trickle charger.") breaks ds1339 wakealarm support by limiting accessible registers. Fix this. Fixes: 51ed73eb998a ("rtc: ds1340: Add support for trickle charger.") Cc: stable@vger.kernel.org Signed-off-by: Soeren Moch <smoch@web.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-10-22rtc: ds1685: simplify getting .driver_dataWolfram Sang1-2/+1
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>
2018-10-16rtc: m41t80: mark expected switch fall-throughGustavo A. R. Silva1-1/+1
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>
2018-10-16rtc: tegra: Propagate errors from platform_get_irq()Thierry Reding1-3/+7
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>
2018-10-04rtc: cmos: Remove the `use_acpi_alarm' module parameter for !ACPIMaciej W. Rozycki1-7/+20
Fix a problem with commit 311ee9c151ad ("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: 311ee9c151ad ("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>
2018-10-04rtc: cmos: Fix non-ACPI undefined reference to `hpet_rtc_interrupt'Maciej W. Rozycki1-1/+1
Fix a commit 311ee9c151ad ("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: 311ee9c151ad ("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>
2018-10-03rtc: mv: let the core handle invalid alarmsAlexandre Belloni1-6/+2
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>
2018-10-03rtc: vr41xx: switch to rtc_time64_to_tm/rtc_tm_to_time64Alexandre Belloni1-6/+3
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>
2018-09-28rtc: ab8500: remove useless checkAlexandre Belloni1-1/+1
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>
2018-09-28rtc: ab8500: let the core handle rangeAlexandre Belloni1-49/+4
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>
2018-09-28rtc: ab8500: use rtc_add_groupAlexandre Belloni1-24/+17
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>
2018-09-28rtc: rs5c348: report error when time is invalidAlexandre Belloni1-22/+21
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>
2018-09-28rtc: rs5c348: remove forward declarationAlexandre Belloni1-6/+4
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>
2018-09-28rtc: rs5c348: remove useless labelAlexandre Belloni1-11/+7
Since commit 8fb1ecb36f7e ("rtc: rtc-rs5c348: use devm_*() functions") the kfree_exit label simply returns ret. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28rtc: armada38x: switch to rtc_time64_to_tm/rtc_tm_to_time64Alexandre Belloni1-16/+6
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>
2018-09-28rtc: armada38x: add rangeAlexandre Belloni1-0/+2
The RTC is a 32bit seconds counter. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Tested-by: Gregory CLEMENT <gregory.clement@bootlin.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28rtc: armada38x: fix possible race conditionAlexandre Belloni1-11/+11
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>
2018-09-28rtc: lib: correct documentation typoAlexandre Belloni1-1/+1
rtc_time64_to_tm has not been called rtc_time_to_tm64 Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28rtc: ds1307: use rtc_add_groupAlexandre Belloni1-39/+14
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>
2018-09-28rtc: ds1685: use rtc_add_groupAlexandre Belloni1-39/+1
Use rtc_add_group to add the sysfs group in a race free manner. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28rtc: ds1685: use generic nvmemAlexandre Belloni1-67/+25
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>
2018-09-28rtc: ds1685: drop RTC_DS1685_PROC_REGSAlexandre Belloni2-72/+0
/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>
2018-09-28rtc: test: Switch to SPDX identifierAlexandre Belloni1-4/+1
Replace the license boilerplate by an SPDX identifier Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28rtc: test: make license text and module license match.Alexandre Belloni1-1/+1
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>
2018-09-28rtc: tx4939: fixup nvmem name and register sizeAlexandre Belloni1-3/+1
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>
2018-09-28rtc: isl1208: don't include core header fileAlexandre Belloni1-4/+3
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>
2018-09-28rtc: move rtc_add_group/s definitionsAlexandre Belloni1-14/+0
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>
2018-09-28rtc: reorder Makefile entriesAlexandre Belloni1-6/+6
A few entries are not placed correctly, reorder them. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28rtc: ds1307: add frequency_test_enable attribute on m41txxGiulio Benetti1-0/+92
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>
2018-09-28rtc: ds1307: add offset sysfs for mt41txx chips.Giulio Benetti1-0/+77
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>
2018-09-28rtc: isl1208: avoid possible sysfs raceAlexandre Belloni1-17/+10
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.
2018-09-13rtc: remove irq_task from kerneldocAlexandre Belloni1-3/+0
Stale mentions of irq_task are left in the kerneldoc after its removal. Remove them. There is still one indirect mention left but commit 3c8bb90efb6e ("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>
2018-09-13rtc: unexport non devm managed registrationAlexandre Belloni1-7/+5
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>
2018-09-12rtc: abx80x: add basic watchdog supportJeremy Gebben2-4/+113
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>
2018-09-12rtc: abx80x: use a 'priv' struct for client dataJeremy Gebben1-8/+19
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>
2018-09-11rtc: pl031: switch to devm_rtc_allocate_device/rtc_register_deviceAlexandre Belloni1-9/+9
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>
2018-09-11rtc: pl030: fix possible race conditionAlexandre Belloni1-6/+9
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>
2018-09-11rtc: mt6397: fix possible race conditionAlexandre Belloni1-5/+8
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>
2018-08-31rtc: mrst: remove set but not used variable 'valid'YueHaibing1-2/+1
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>
2018-08-27rtc: rv8803: add Epson RX8803 supportAlexandre Belloni1-0/+5
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>
2018-08-27rtc: rv8803: fix the rv8803 id in the OF tableAlexandre Belloni1-1/+1
The ID for RV8803 must be rv_8803 Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-08-27rtc: sysfs: fix NULL check in rtc_add_groups()Dan Carpenter1-2/+2
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: a0a1a1ba3032 ("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>
2018-08-27rtc: sun6i: Use struct_size() in kzalloc()Gustavo A. R. Silva1-2/+1
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>
2018-08-27rtc: jz4740: Drop dependency on MACH_INGENICPaul Cercueil1-1/+1
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>
2018-08-27rtc: omap: Cut down the shutdown time from 2 seconds to 1 secKeerthy1-10/+15
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>
2018-08-27rtc: omap: use of_device_is_system_power_controller functionKeerthy1-2/+1
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>
2018-08-27rtc: rtc-mrst: Replace mdelay() with msleep() in mrst_read_time()Jia-Ju Bai1-1/+1
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>
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