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path: root/drivers/rtc/rtc-abx80x.c
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2019-03-18rtc: abx80x: remove useless .removeAlexandre Belloni1-6/+0
.remove is empty, remove it. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-03-18rtc: abx80x: use rtc_add_groupAlexandre Belloni1-26/+6
Use rtc_add_group to add the sysfs group in a race free manner. This has the side effect of moving the files to their proper location. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-03-18rtc: abx80x: convert to SPDX identifierAlexandre Belloni1-4/+1
Use SPDX-License-Identifier instead of a verbose license text. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-03-04rtc: update my email addressAlexandre Belloni1-2/+2
Use my current email address. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-01-30rtc: abx80x: Configure reserved bits in RV1805Marek Vasut1-2/+65
The RV1805 uses smaller package than the AB1805, discern those two chips based on the compatible value and configure reserved bits in the RV1805 to prevent current leakage and accidental test mode entry. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com> To: linux-rtc@vger.kernel.org Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-12-18rtc: abx80x: Implement RTC_VL_READ,CLR ioctlsMarek Vasut1-0/+38
Implement standard ioctls for polling the battery status and clearing the battery low indication from userspace. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-12rtc: abx80x: add basic watchdog supportJeremy Gebben1-4/+112
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>
2018-03-02rtc: abx80x: remove useless messageAlexandre Belloni1-5/+1
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>
2017-10-13rtc: abx80x: solve race conditionAlexandre Belloni1-5/+5
There is a race condition that can happen if abx80x_probe() fails after the rtc registration succeeded. Solve that by moving the registration at the end of the probe function. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-10-13rtc: abx80x: switch to rtc_register_deviceAlexandre Belloni1-3/+7
This allows for future improvement of the driver. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-07-19rtc: abx80x: use devm_add_action_or_reset()Sudip Mukherjee1-7/+5
If devm_add_action() fails we are explicitly calling the cleanup to free the resources allocated. Lets use the helper devm_add_action_or_reset() and return directly in case of error, as we know that the cleanup function has been already called by the helper if there was any error. Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-03-25rtc: abx80x: handle the oscillator failure bitMylène Josserand1-2/+31
Handle the Oscillator Failure ('OF') bit from Oscillator Status register (0x1D). This bit is cleared on set_time function and is read each time the date/time is read, but only in case of XT Oscillator selection. In RC mode, this bit is always set. Signed-off-by: Mylène Josserand <mylene.josserand@free-electrons.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-03-25rtc: abx80x: handle autocalibrationMylène Josserand1-0/+219
The autocalibration is separated in two bits to set in Oscillator Control register (0x1c) : - OSEL bit to select the oscillator type (XT or RC). - ACAL bit to select the autocalibration type. These functionnalities are exported in sysfs entries : "oscillator" and "autocalibration". Respectively, the values are "xtal" for XT oscillator and "rc" for RC oscillator and 0 to disable the autocalibration cycle, 512 for a 512 seconds autocalibration cycle and 1024 for a cycle of 1024 seconds. Examples : Set to XT Oscillator echo xtal > /sys/class/rtc/rtc0/device/oscillator Activate an autocalibration every 512 seconds echo 512 > /sys/class/rtc/rtc0/device/autocalibration Signed-off-by: Mylène Josserand <mylene.josserand@free-electrons.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-01-11rtc: abx80x: add alarm supportAlexandre Belloni1-4/+141
Add alarm support to the abx80x driver. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-01-11rtc: abx80x: Add Microcrystal rv1805 supportAlexandre Belloni1-0/+1
Microcrystal RV-1805 is compatible with Abracon 1805. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2015-09-05rtc: abx80x: fix RTC write bitMitja Spes1-1/+1
Fix RTC write bit as per application manual Cc: stable@vger.kernel.org # 4.1+ Signed-off-by: Mitja Spes <mitja@lxnav.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2015-05-05rtc: add rtc-abx80x, a driver for the Abracon AB x80x i2c rtcPhilippe De Muyter1-0/+307
This is a basic driver for the ultra-low-power Abracon AB x80x series of RTC chips. It supports in particular, the supersets AB0805 and AB1805. It allows reading and writing the time, and enables the supercapacitor/ battery charger. [arnd@arndb.de: abx805 depends on i2c] [alexandre.belloni@free-electrons.com: renam buffer from date to buf in abx80x_rtc_read_time()] Signed-off-by: Philippe De Muyter <phdm@macqel.be> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Paul Bolle <pebolle@tiscali.nl> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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