kernel/drivers/rtc/rtc-abx80x.c, branch linux-4.16.y

rtc: abx80x: solve race condition

2017-10-12T22:10:12Z

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

rtc: abx80x: switch to rtc_register_device

2017-10-12T22:10:11Z

This allows for future improvement of the driver. Signed-off-by: Alexandre Belloni

rtc: abx80x: use devm_add_action_or_reset()

2016-07-19T15:27:42Z

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 Signed-off-by: Alexandre Belloni

rtc: abx80x: handle the oscillator failure bit

2016-03-25T01:41:13Z

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 Signed-off-by: Alexandre Belloni

rtc: abx80x: handle autocalibration

2016-03-25T01:41:13Z

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 Signed-off-by: Alexandre Belloni

rtc: abx80x: add alarm support

2016-01-11T19:20:01Z

Add alarm support to the abx80x driver. Signed-off-by: Alexandre Belloni

rtc: abx80x: Add Microcrystal rv1805 support

2016-01-11T19:20:01Z

Microcrystal RV-1805 is compatible with Abracon 1805. Signed-off-by: Alexandre Belloni

rtc: abx80x: fix RTC write bit

2015-09-05T17:37:31Z

Fix RTC write bit as per application manual Cc: stable@vger.kernel.org # 4.1+ Signed-off-by: Mitja Spes Signed-off-by: Alexandre Belloni

rtc: add rtc-abx80x, a driver for the Abracon AB x80x i2c rtc

2015-05-06T00:10:10Z

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 Cc: Alessandro Zummo Signed-off-by: Alexandre Belloni Signed-off-by: Arnd Bergmann Cc: Paul Bolle Cc: Arnd Bergmann Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds