linux-toradex.git/drivers/rtc/rtc-abx80x.c, branch v4.6-rc5 Linux kernel for Apalis and Colibri modules rtc: abx80x: handle the oscillator failure bit 2016-03-25T01:41:13+00:00 Mylène Josserand mylene.josserand@free-electrons.com 2016-03-21T17:06:10+00:00 ee087744247c421c83abea7f01217bfd39b8f5a9 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> 
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>
rtc: abx80x: handle autocalibration 2016-03-25T01:41:13+00:00 Mylène Josserand mylene.josserand@free-electrons.com 2016-03-21T17:06:09+00:00 59a8383adb75459c9d6766656bccc05950b783ea 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> 
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>
rtc: abx80x: add alarm support 2016-01-11T19:20:01+00:00 Alexandre Belloni alexandre.belloni@free-electrons.com 2015-12-16T23:36:22+00:00 718a820a303ca60645ab703451ecfebf045c896b Add alarm support to the abx80x driver. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> 
Add alarm support to the abx80x driver.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
rtc: abx80x: Add Microcrystal rv1805 support 2016-01-11T19:20:01+00:00 Alexandre Belloni alexandre.belloni@free-electrons.com 2015-12-16T23:36:21+00:00 fca733a14ea549dbc4f759578704c48f5fb0ab45 Microcrystal RV-1805 is compatible with Abracon 1805. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> 
Microcrystal RV-1805 is compatible with Abracon 1805.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
rtc: abx80x: fix RTC write bit 2015-09-05T17:37:31+00:00 Mitja Spes mitja@lxnav.com 2015-09-02T08:02:29+00:00 5f1b2f77646fc0ef2f36fc554f5722a1381d0892 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> 
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>
rtc: add rtc-abx80x, a driver for the Abracon AB x80x i2c rtc 2015-05-06T00:10:10+00:00 Philippe De Muyter phdm@macqel.be 2015-05-05T23:23:44+00:00 4d61ff6b9960cb00cf2c12abd5769aa2dd475415 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> 
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>