RTC for 4.19

Subsystem:
 - new helpers to add custom sysfs attributes
 - struct rtc_task removal along with rtc_irq_register/rtc_irq_unregister
 - rtc_irq_set_state and rtc_irq_set_freq are not exported anymore

Drivers:
 - armada38x: reset after rtc power loss
 - ds1307: now supports m41t11
 - isl1208: now supports isl1219 and tamper detection
 - pcf2127: internal SRAM support
rtc: ds1307: simplify hwmon config

We don't have to define an extra config symbol, IS_REACHABLE does
what we need. And having this config symbol just to save the few
bytes of hwmon support on non-DS3231 chips isn't worth it IMO
(especially as the symbol is set per default).

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2 files changed