linux-toradex.git/include/linux/rtc.h, branch v4.14-rc7

rtc: remove .open() and .release()

2017-08-24T14:34:51+00:00

There are no driver left using .open and .release. There is no good use
case for them as there is nothing the character device interface does that
should not be done in the sysfs interface or in-kernel interface.

Remove those callbacks now to avoid future confusion.

Signed-off-by: Alexandre Belloni

rtc: Remove wrong deprecation comment

2017-07-12T21:11:23+00:00

rtc_time_to_tm and rtc_tm_to_time are not deprecated and make perfect sense
for RTCs that are simple 32bit counters.

Signed-off-by: Alexandre Belloni

rtc: add generic nvmem support

2017-07-07T11:14:14+00:00

Many RTCs have an on board non volatile storage. It can be battery backed
RAM or an EEPROM. Use the nvmem subsystem to export it to both userspace
and in-kernel consumers.

This stays compatible with the previous (non documented) ABI that was using
/sys/class/rtc/rtcx/device/nvram to export that memory. But will warn about
the deprecation.

Signed-off-by: Alexandre Belloni

rtc: introduce new registration method

2017-07-07T11:14:10+00:00

Introduce rtc_register_device() to register an already allocated and
initialized struct rtc_device. It automatically sets up the owner and the
two steps allocation/registration will allow to remove race conditions in
the IRQ handling of some driver. It also allows to properly extend the core
without adding more arguments to rtc_device_register().

Signed-off-by: Alexandre Belloni

rtc: remove rtc_device.name

2017-06-03T08:55:36+00:00

rtc->name is only used in messages were it is superfluous. Remove it
completely from the structure.

Signed-off-by: Alexandre Belloni

rtc: Add functions to set and read rtc offset

2016-03-14T16:08:15+00:00

A number of rtc devices, such as the NXP pcf2123 include a facility
to adjust the clock in order to compensate for temperature or a
crystal, capacitor, etc, that results in the rtc clock not running
at exactly 32.768 kHz.

Data sheets I have seen refer to this as a clock offset, and measure it
in parts per million, however they often reference ppm to 2 digits of
precision, which makes integer ppm less than ideal.

We use parts per billion, which more than covers the precision needed
and works nicely within 32 bits

Signed-off-by: Joshua Clayton 
Signed-off-by: Alexandre Belloni

rtc: interface: Remove rtc_set_mmss()

2015-06-24T23:13:43+00:00

Now rtc_set_mmss() has no users, just remove it.

We still have rtc_set_time() doing similar things.

Signed-off-by: Xunlei Pang 
Signed-off-by: Alexandre Belloni

rtc: Introduce rtc_tm_sub() helper function

2015-06-24T23:13:41+00:00

There're many sites need comparing the two rtc_time variants for many
rtc drivers, especially in the instances of rtc_class_ops::set_alarm().

So add this common helper function to make things easy.

Suggested-by: Arnd Bergmann 
Signed-off-by: Xunlei Pang 
Signed-off-by: Alexandre Belloni

rtc: interface: Remove unused return value from rtc_timer_cancel()

2015-06-19T18:03:20+00:00

The rtc_timer_cancel() always returns 0 and cannot fail (calls only
other void-returning functions).

Signed-off-by: Krzysztof Kozlowski 
Signed-off-by: Alexandre Belloni

rtc: interface: Fix coding style violations

2015-06-19T18:03:20+00:00

Fix issues reported by checkpatch:
  ERROR: open brace '{' following struct go on the same line
  ERROR: "foo* bar" should be "foo *bar"
Additionally adjust alignment of wrapped function arguments.

Signed-off-by: Krzysztof Kozlowski 
Signed-off-by: Alexandre Belloni