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path: root/drivers/rtc/rtc-s35390a.c
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2019-10-19rtc: s35390a: set rangeAlexandre Belloni
This is a standard BCD RTC that will fail in 2100. Link: https://lore.kernel.org/r/20191016200848.30246-2-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-10-19rtc: s35390a: convert to devm_rtc_allocate_deviceAlexandre Belloni
This allows further improvement of the driver and removes the need to forward declare s35390a_driver. Link: https://lore.kernel.org/r/20191016200848.30246-1-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-09-01rtc: s35390a: convert to devm_i2c_new_dummy_device()Wolfram Sang
I was about to simplify the call to i2c_unregister_device() when I realized that converting to devm_i2c_new_dummy_device() will simplify the driver a lot. So I took this approach. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Link: https://lore.kernel.org/r/20190830133124.21633-3-wsa+renesas@sang-engineering.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-07-23rtc: s35390a: convert to i2c_new_dummy_deviceWolfram Sang
Move from i2c_new_dummy() to i2c_new_dummy_device(), so we now get an ERRPTR which we use in error handling. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Link: https://lore.kernel.org/r/20190722172618.4061-4-wsa+renesas@sang-engineering.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-07-17Merge tag 'rtc-5.3' of ↵Linus Torvalds
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 ...
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner
Based on 1 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 as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-23rtc: s35390a: change FLAG defines to use BIT macroRichard Leitner
To be consistent change the S35390A_FLAG defines to use the BIT macro (like the S35390A_INT2_MODE defines). Signed-off-by: Richard Leitner <richard.leitner@skidata.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-05-23rtc: s35390a: introduce struct device in probeRichard Leitner
To simplify access and shorten code introduce a struct device pointer in the s35390a probe function. Signed-off-by: Richard Leitner <richard.leitner@skidata.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-05-23rtc: s35390a: set uie_unsupportedRichard Leitner
Alarms are only supported on a per minute basis. This is why uie_unsupported is set. Furthermore issue a warning when a second based alarm is requested. Signed-off-by: Richard Leitner <richard.leitner@skidata.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-05-23rtc: s35390a: clarify INT2 pin output modesRichard Leitner
Fix the INT2 mode mask to not include the "TEST" flag. Furthermore remove the not needed reversion of bits when parsing the INT2 modes. Instead reverse the INT2_MODE defines to match the bit order from the datasheet. Additionally mention the flag names from the datasheet for the different modes in the comments. Signed-off-by: Richard Leitner <richard.leitner@skidata.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-10-22rtc: s35390a: Change buf's type to u8 in s35390a_initNathan Chancellor
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>
2018-03-17rtc: s35390a: remove useless indirectionAlexandre Belloni
s35390a_set_datetime, s35390a_get_datetime, s35390a_set_alarm and s35390a_read_alarm are only used after casting dev to an i2c_client. Remove that useless indirection. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-03-17rtc: s35390a: stop validating rtc_time in .read_timeAlexandre Belloni
The RTC core is always calling rtc_valid_tm after the read_time callback. It is not necessary to call it before returning from the callback. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-03-17rtc: s35390a: remove useless messageAlexandre Belloni
It is not necessary to print a message when the time is invalid as userspace will already get an error (and an optional dev_dbg message). Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2017-07-31rtc: s35390a: implement ioctlsFabien Lahoudere
Implements RTC_VL_READ and RTC_VL_CLR ioctls. Signed-off-by: Fabien Lahoudere <fabien.lahoudere@collabora.co.uk> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-07-31rtc: s35390a: handle invalid RTC timeFabien Lahoudere
If RTC time have been altered by low voltage, we notify users that RTC time is invalid by returning -EINVAL. The RTC time needs to be set correctly to clear the invalid flag. Signed-off-by: Fabien Lahoudere <fabien.lahoudere@collabora.co.uk> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-03-09rtc: s35390a: Add OF device ID tableJavier Martinez Canillas
The driver doesn't have a struct of_device_id table but supported devices are registered via Device Trees. This is working on the assumption that a I2C device registered via OF will always match a legacy I2C device ID and that the MODALIAS reported will always be of the form i2c:<device>. But this could change in the future so the correct approach is to have an OF device ID table if the devices are registered via OF. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-07-11rtc: s35390a: improve two comments in .set_alarmUwe Kleine-König
Be more explicit in some comments. Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-07-11rtc: s35390a: improve irq handlingUwe Kleine-König
On some QNAP NAS devices the rtc can wake the machine. Several people noticed that once the machine was woken this way it fails to shut down. That's because the driver fails to acknowledge the interrupt and so it keeps active and restarts the machine immediatly after shutdown. See https://bugs.debian.org/794266 for a bug report. Doing this correctly requires to interpret the INT2 flag of the first read of the STATUS1 register because this bit is cleared by read. Note this is not maximally robust though because a pending irq isn't detected when the STATUS1 register was already read (and so INT2 is not set) but the irq was not disabled. But that is a hardware imposed problem that cannot easily be fixed by software. Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-07-11rtc: s35390a: implement reset routine as suggested by the referenceUwe Kleine-König
There were two deviations from the reference manual: you have to wait half a second when POC is active and you might have to repeat initialization when POC or BLD are still set after the sequence. Note however that as POC and BLD are cleared by read the driver might not be able to detect that a reset is necessary. I don't have a good idea how to fix this. Additionally report the value read from STATUS1 to the caller. This prepares the next patch. Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-07-11rtc: s35390a: fix reading out alarmUwe Kleine-König
There are several issues fixed in this patch: - When alarm isn't enabled, set .enabled to zero instead of returning -EINVAL. - Ignore how IRQ1 is configured when determining if IRQ2 is on. - The three alarm registers have an enable flag which must be evaluated. - The chip always triggers when the seconds register gets 0. Note that the rtc framework however doesn't handle the result correctly because it doesn't check wday being initialized and so interprets an alarm being set for 10:00 AM in three days as 10:00 AM tomorrow (or today if that's not over yet). Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2013-04-29rtc: rtc-s35390a: use devm_*() functionsJingoo Han
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>
2012-10-06drivers/rtc/rtc-s35390a.c: add wakealarm support for rtc-s35390A rtc chipMichael Langer
Add basic get/set alarm support for the Seiko Instruments S-35390A. The chip is used on the QNAP TS-219P+ NAS device. Signed-off-by: Michael Langer <michael.brainbug.langer@googlemail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-06drivers/rtc/rtc-s35390a.c: convert struct i2c_msg initialization to C99 formatShubhrajyoti D
Convert the struct i2c_msg initialization to C99 format. This makes maintaining and editing the code simpler. Also helps once other fields like transferred are added in future. Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com> Reviewed-by: Felipe Balbi <balbi@ti.com> 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>
2012-03-23rtc: convert rtc i2c drivers to module_i2c_driverAxel Lin
Factor out some boilerplate code for i2c driver registration into module_i2c_driver. Signed-off-by: Axel Lin <axel.lin@gmail.com> Cc: Piotr Ziecik <kosmo@semihalf.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Scott Wood <scottwood@freescale.com> Cc: Srikanth Srinivasan <srikanth.srinivasan@freescale.com> Cc: Mike Rapoport <mike@compulab.co.il> Cc: Sergey Lapin <slapin@ossfans.org> Cc: Roman Fietze <roman.fietze@telemotive.de> Cc: Herbert Valerio Riedel <hvr@gnu.org> Cc: Alexander Bigga <ab@mycable.de> Cc: Dale Farnsworth <dale@farnsworth.org> Cc: Gregory Hermant <gregory.hermant@calao-systems.com> Cc: Wolfgang Grandegger <wg@grandegger.com> Cc: Martyn Welch <martyn.welch@ge.com> Cc: Byron Bradley <byron.bbradley@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-06-03i2c: Remove all i2c_set_clientdata(client, NULL) in driversWolfram Sang
I2C drivers can use the clientdata-pointer to point to private data. As I2C devices are not really unregistered, but merely detached from their driver, it used to be the drivers obligation to clear this pointer during remove() or a failed probe(). As a couple of drivers forgot to do this, it was agreed that it was cleaner if the i2c-core does this clearance when appropriate, as there is no guarantee for the lifetime of the clientdata-pointer after remove() anyhow. This feature was added to the core with commit e4a7b9b04de15f6b63da5ccdd373ffa3057a3681 to fix the faulty drivers. As there is no need anymore to clear the clientdata-pointer, remove all current occurrences in the drivers to simplify the code and prevent confusion. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: Richard Purdie <rpurdie@linux.intel.com> Acked-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-10-20drivers/rtc/: use bcd2bin/bin2bcdAdrian Bunk
Change drivers/rtc/ to use the new bcd2bin/bin2bcd functions instead of the obsolete BCD_TO_BIN/BIN_TO_BCD/BCD2BIN/BIN2BCD macros. Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: 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>
2008-05-11i2c: Match dummy devices by typeJean Delvare
As the old driver_name/type matching scheme is going away soon, change the dummy device mechanism to use the new matching scheme. This has the downside that dummy i2c clients can no longer choose their name, they'll all appear as "dummy" in sysfs and in log messages. I don't think it is a problem in practice though, as there is little reason to use these i2c clients to log messages. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-04-29i2c: Convert most new-style drivers to use module aliasingJean Delvare
Based on earlier work by Jon Smirl and Jochen Friedrich. Update most new-style i2c drivers to use standard module aliasing instead of the old driver_name/type driver matching scheme. I've left the video drivers apart (except for SoC camera drivers) as they're a bit more diffcult to deal with, they'll have their own patch later. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Jon Smirl <jonsmirl@gmail.com> Cc: Jochen Friedrich <jochen@scram.de>
2008-04-29i2c: Add support for device alias namesJean Delvare
Based on earlier work by Jon Smirl and Jochen Friedrich. This patch allows new-style i2c chip drivers to have alias names using the official kernel aliasing system and MODULE_DEVICE_TABLE(). At this point, the old i2c driver binding scheme (driver_name/type) is still supported. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Jochen Friedrich <jochen@scram.de> Cc: Jon Smirl <jonsmirl@gmail.com> Cc: Kay Sievers <kay.sievers@vrfy.org>
2008-03-04rtc: add support for the S-35390A RTC chipByron Bradley
This adds basic get/set time support for the Seiko Instruments S-35390A. This chip communicates using I2C and is used on the QNAP TS-109/TS-209 NAS devices. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Byron Bradley <byron.bbradley@gmail.com> Acked-by: Jean Delvare <khali@linux-fr.org> Acked-by: David Brownell <david-b@pacbell.net> Tested-by: Tim Ellis <tim@ngndg.com> 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>
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