summaryrefslogtreecommitdiffstats
path: root/drivers/rtc/rtc-pcf2123.c
Commit message (Collapse)AuthorAgeFilesLines
* Merge tag 'rtc-5.3' of ↵Linus Torvalds2019-07-171-179/+175
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux Pull RTC updates from Alexandre Belloni: "A quiet cycle this time. - ds1307: properly handle oscillator failure flags - imx-sc: alarm support - pcf2123: alarm support, correct offset handling - sun6i: add R40 support - simplify getting the adapter of an i2c client" * tag 'rtc-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (37 commits) rtc: wm831x: Add IRQF_ONESHOT flag rtc: stm32: remove one condition check in stm32_rtc_set_alarm() rtc: pcf2123: Fix build error rtc: interface: Change type of 'count' from int to u64 rtc: pcf8563: Clear event flags and disable interrupts before requesting irq rtc: pcf8563: Fix interrupt trigger method rtc: pcf2123: fix negative offset rounding rtc: pcf2123: add alarm support rtc: pcf2123: use %ptR rtc: pcf2123: port to regmap rtc: pcf2123: remove sysfs register view rtc: rx8025: simplify getting the adapter of a client rtc: rx8010: simplify getting the adapter of a client rtc: rv8803: simplify getting the adapter of a client rtc: m41t80: simplify getting the adapter of a client rtc: fm3130: simplify getting the adapter of a client rtc: tegra: Drop MODULE_ALIAS rtc: sun6i: Add R40 compatible dt-bindings: rtc: sun6i: Add the R40 RTC compatible dt-bindings: rtc: Convert Allwinner A31 RTC to a schema ...
| * rtc: pcf2123: fix negative offset roundingAlexandre Belloni2019-06-191-1/+1
| | | | | | | | | | | | | | | | Using result = (value + divisor/2) / divisor is rounding values up and only works well for positive values. Instead use DIV_ROUND_CLOSEST which does the correct thing. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
| * rtc: pcf2123: add alarm supportDylan Howey2019-06-191-2/+114
| | | | | | | | | | | | | | Allows alarm to be controlled using, e.g., the RTC_WKALM_SET ioctl. Signed-off-by: Dylan Howey <Dylan.Howey@tennantco.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
| * rtc: pcf2123: use %ptRDylan Howey2019-06-191-10/+2
| | | | | | | | | | | | | | Use %ptR to print date in human readable format. Signed-off-by: Dylan Howey <Dylan.Howey@tennantco.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
| * rtc: pcf2123: port to regmapDylan Howey2019-06-191-81/+61
| | | | | | | | | | | | | | | | | | | | | | | | Also remove pcf2123_delay_trec. This claimed to add a 30ns delay to SPI writes, but I could not see any reference to this requirement in the datasheet. Closest thing I could find to a requirement are timings for the SPI chip enable line, which cannot be controlled by this driver (the ndelay came after the call to spi_write_then_read, which means it would sleep after CE has already gone inactive). Things seem to work fine without it. Signed-off-by: Dylan Howey <Dylan.Howey@tennantco.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
| * rtc: pcf2123: remove sysfs register viewDylan Howey2019-06-191-89/+1
| | | | | | | | | | | | | | Use regmap debugfs register view instead. Signed-off-by: Dylan Howey <Dylan.Howey@tennantco.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
* | treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner2019-06-191-5/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | Based on 2 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* rtc: pcf2123: Add Microcrystal rv2123Alexandre Belloni2018-12-181-0/+1
| | | | | | | Add a compatible string for Microcrystal rv2123 as the reset procedure seem to be differing. However, the current driver works just fine. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
* rtc: stop validating rtc_time in .read_timeAlexandre Belloni2018-03-021-1/+1
| | | | | | | The RTC core is always calling rtc_valid_tm after the read_time callback. It is not necessary to call it just before returning from the callback. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
* rtc: pcf2123: Add missing error code assignment before testChristophe JAILLET2016-08-311-2/+3
| | | | | | | | | | | | It is likely that checking the result of 'pcf2123_write_reg' is expected here. Also fix a small style issue. The '{' at the beginning of the function is misplaced. Fixes: 809b453b76e15 ("rtc: pcf2123: clean up writes to the rtc chip") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: pcf2123: use sign_extend32() for sign extensionMartin Kepplinger2016-06-041-2/+2
| | | | | | | Use sign_extend32() instead of open coding sign extension. Signed-off-by: Martin Kepplinger <martink@posteo.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: remove useless DRV_VERSIONAlexandre Belloni2016-05-201-4/+0
| | | | | | | | | Many drivers are defining a DRV_VERSION. This is often only used for MODULE_VERSION and sometimes to print an info message at probe time. This is kind of pointless as they are all versionned with the kernel anyway. Also the core will print a message when a new rtc is found. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: pcf2123: implement read_offset and set_offsetJoshua Clayton2016-03-141-0/+57
| | | | | | | | | pcf2123 has an offset register, which can be used to make minor adjustments to the clock rate to compensate for temperature or a crystal that is not exactly right. Signed-off-by: Joshua Clayton <stillcompiling@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: pcf2123: avoid resetting the clock if possibleJoshua Clayton2016-03-141-3/+12
| | | | | | | | | | | | | | | | | | | | | | pcf2123 data sheet recommends a software reset when the chip is first powered on. This change avoids resetting the chip every time the driver is loaded, which has some negative effects. There are several registers including a clock rate adjustment that really should survive a reload of the driver (or reboot). In addition, stopping and restarting the clock to verify the chip is there is not a good thing once the time is set. According to the data sheet, the seconds register has a 1 in the high bit when the voltage has gotten low. We check for this condition, as well as whether the time retrieved from the chip is valid. We reset the rtc only if the time is not reliable and valid. This is sufficient for checking for the presence of the chip, as either all zeros or all 0xff will result in an invalid time/date Signed-off-by: Joshua Clayton <stillcompiling@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: pcf2123: refactor chip reset into a functionJoshua Clayton2016-03-141-28/+36
| | | | | | | | | Refactor chip reset items into its own function, isolating it from the rest of the device probe. Subsequent commits will avoid calling this code. Signed-off-by: Joshua Clayton <stillcompiling@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: pcf2123: clean up writes to the rtc chipJoshua Clayton2016-03-141-35/+32
| | | | | | | | | | Add new functions pcf2123_write(), and pcf2123_write_reg(). Use named defines for the values being written. This improves modularity and readability, and reduces lines of code. Signed-off-by: Joshua Clayton <stillcompiling@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: pcf2123: clean up reads from the chipJoshua Clayton2016-03-141-17/+19
| | | | | | | | Put read operations into a function. This improves modularity and readability. Signed-off-by: Joshua Clayton <stillcompiling@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: pcf2123: define registers and bit macrosJoshua Clayton2016-03-141-3/+47
| | | | | | | | | | | | Add defines for all 16 registers in the pcf2123. Add defines for useful bits from several registers I've tried to document all the registers, and as best as possible, all the special bits they employ Use BIT() wherever possible in the bit definitions Signed-off-by: Joshua Clayton <stillcompiling@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* spi: Drop owner assignment from spi_driversAndrew F. Davis2015-10-281-1/+0
| | | | | | | | | An spi_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Andrew F. Davis <afd@ti.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
* rtc: use rtc_valid_tm() error code when reading date/timeAndrea Scian2015-09-051-7/+1
| | | | | | | | | There's a wrong comment in some RTC drivers that say it's better to ignore rtc_valid_tm() when reading RTC timestamp. However this is wrong and is better to return to the userspace the error if timestamp is not valid. Signed-off-by: Andrea Scian <andrea.scian@dave.eu> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* drivers/rtc/rtc-pcf2123.c: add support for devicetreeJoshua Clayton2015-02-131-0/+10
| | | | | | | | | | | | Add compatible string "nxp,rtc-pcf2123" Document the binding Signed-off-by: Joshua Clayton <stillcompiling@gmail.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Grant Likely <grant.likely@linaro.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-pcf2123.c: use dev_get_platdata()Jingoo Han2013-11-131-1/+1
| | | | | | | | | | Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. This is a cosmetic change to make the code simpler and enhance the readability. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-pcf2123.c: replace strict_strtoul() with kstrtoul()Jingoo Han2013-07-031-5/+10
| | | | | | | | | | The usage of strict_strtoul() is not preferred, because strict_strtoul() is obsolete. Thus, kstrtoul() should be used. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-pcf2123.c: remove space before tabsSachin Kamat2013-07-031-5/+5
| | | | | | | | | | | Silences the following checkpatch warning: WARNING: please, no space before tabs Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Cc: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-pcf2123.c: fix error return code in pcf2123_probe()Wei Yongjun2013-04-291-0/+1
| | | | | | | | | | Fix to return -ENODEV in the chip not found error handling case instead of 0, as done elsewhere in this function. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: rtc-pcf2123: use devm_*() functionsJingoo Han2013-04-291-8/+3
| | | | | | | | Use devm_*() functions to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Drivers: rtc: remove __dev* attributes.Greg Kroah-Hartman2013-01-031-3/+3
| | | | | | | | | | | | | | | | | | | | | CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Mike Frysinger <vapier.adi@gmail.com> Cc: Wan ZongShun <mcuos.com@gmail.com> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers/rtc/rtc-pcf2123.c: initialize dynamic sysfs attributesIlya Shchepetkov2012-08-211-0/+2
| | | | | | | | | | | | | | | Dynamically allocated sysfs attributes must be initialized using sysfs_attr_init(), otherwise lockdep complains: BUG: key <address> not in .data! Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Ilya Shchepetkov <shchepetkov@ispras.ru> Cc: Chris Verges <chrisv@cyberswitching.com> Cc: Christian Pellegrin <chripell@fsfe.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: convert rtc spi drivers to module_spi_driverAxel Lin2012-03-231-12/+1
| | | | | | | | | | | | | | | | | | Factor out some boilerplate code for spi driver registration into module_spi_driver. Signed-off-by: Axel Lin <axel.lin@gmail.com> Cc: Mark Jackson <mpfj@mimc.co.uk> Cc: Dennis Aberilla <denzzzhome@yahoo.com> Cc: Nikolaus Voss <n.voss@weinmann.de> Cc: "Kim B. Heino" <Kim.Heino@bluegiga.com> Cc: Raphael Assenat <raph@raphnet.net> Cc: Chris Verges <chrisv@cyberswitching.com> Cc: Magnus Damm <damm@opensource.se> Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/: remove redundant spi driver bus initializationLars-Peter Clausen2012-01-101-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | In ancient times it was necessary to manually initialize the bus field of an spi_driver to spi_bus_type. These days this is done in spi_driver_register(), so we can drop the manual assignment. The patch was generated using the following coccinelle semantic patch: // <smpl> @@ identifier _driver; @@ struct spi_driver _driver = { .driver = { - .bus = &spi_bus_type, }, }; // </smpl> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: Add module.h to implicit users in drivers/rtcPaul Gortmaker2011-10-311-0/+1
| | | | | | | | The module.h was implicitly everywhere, but when we clean that up, the implicit users will compile fail; fix them up in advance. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* rtc-pcf2123: move pcf2123_remove to .devexit.textUwe Kleine-König2010-03-061-1/+1
| | | | | | | | | | | | | The function pcf2123_remove is used only wrapped by __devexit_p so define it using __devexit. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Cc: Christian Pellegrin <chripell@fsfe.org> Cc: Chris Verges <chrisv@cyberswitching.com> Cc: Paul Gortmaker <p_gortmaker@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc-philips-pcf2123-rtc-spi-driver-updatesChris Verges2009-09-231-12/+32
| | | | | | | | | Signed-off: Chris Verges <chrisv@cyberswitching.com> Cc: Christian Pellegrin <chripell@fsfe.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: Philips PCF2123 RTC SPI driverChris Verges2009-09-231-0/+344
Add support for the Philips/NXP PCF2123 RTC. Signed-off: Chris Verges <chrisv@cyberswitching.com> Tested-by: Chris Verges <chrisv@cyberswitching.com> Signed-off: Christian Pellegrin <chripell@fsfe.org> Tested-by: Christian Pellegrin <chripell@fsfe.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 01:34:07 +0000