[PATCH 00/11] RTC: rework registration

From: Alexandre Belloni
Date: Thu Jul 06 2017 - 05:43:24 EST

There are multiple race condition issues in the RTC drivers. It is
especially apparent in the IRQ handling and additionnal sysfs attributes

To solve most of those and allow to extend the framework more easily,
introduce a new registration method that allows to first allocate an
rtc_device and then register it.

Also, introduce a generic way to register nvmem devices so RTCs can
export their non volatile storage.

One of the goal will be to get rid of the IS_ERR_OR_NULL(rtc) check in
rtc_update_irq which makes people assume everything is properly handled
in the core.

Alexandre Belloni (11):
rtc: class separate device allocation from registration
rtc: class separate id allocation from registration
rtc: introduce new registration method
rtc: at91rm9200: remove race condition
rtc: add generic nvmem support
rtc: rv8803: switch to rtc_register_device
rtc: rv8803: use generic nvmem support
rtc: rv8803: remove rv8803_remove
rtc: ds1307: switch to rtc_register_device
rtc: ds1307: use generic nvmem
rtc: ds1307: remove ds1307_remove

Documentation/rtc.txt | 2 +
drivers/rtc/Kconfig | 8 ++
drivers/rtc/Makefile | 1 +
drivers/rtc/class.c | 195 +++++++++++++++++++++++++++++++++----------
drivers/rtc/nvmem.c | 113 +++++++++++++++++++++++++
drivers/rtc/rtc-at91rm9200.c | 14 ++--
drivers/rtc/rtc-core.h | 8 ++
drivers/rtc/rtc-ds1307.c | 103 +++++++----------------
drivers/rtc/rtc-rv8803.c | 72 +++++++---------
include/linux/rtc.h | 14 ++++
10 files changed, 362 insertions(+), 168 deletions(-)
create mode 100644 drivers/rtc/nvmem.c