linux-stable.git/Documentation/devicetree/bindings/rtc, branch v5.0

Merge tag 'rtc-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux

2019-01-01T21:24:31+00:00

Pull RTC updates from Alexandre Belloni:
 "Subsystem:
   - new %ptR printk format
   - rename core files
   - allow registration of multiple nvmem devices

  New driver:
   - i.MX system controller RTC

  Driver updates:
   - abx80x: handle voltage ioctls, correct binding doc
   - m41t80: correct month in alarm reads
   - pcf85363: add pcf85263 support
   - pcf8523: properly handle battery low flag
   - s3c: limit alarm to one year in the future as ALMYEAR is broken
   - sun6i: rework clock output binding"

* tag 'rtc-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (54 commits)
  rtc: rename core files
  rtc: nvmem: fix possible use after free
  rtc: add i.MX system controller RTC support
  dt-bindings: fsl: scu: add rtc binding
  rtc: pcf2123: Add Microcrystal rv2123
  rtc: class: reimplement devm_rtc_device_register
  rtc: enforce rtc_timer_init private_data type
  rtc: abx80x: Implement RTC_VL_READ,CLR ioctls
  rtc: pcf85363: Add support for NXP pcf85263 rtc
  dt-bindings: rtc: pcf85363: Document pcf85263 real-time clock
  rtc: pcf8523: don't return invalid date when battery is low
  dt-bindings: rtc: use a generic node name for ds1307
  PM: Switch to use %ptR
  m68k/mac: Switch to use %ptR
  Input: hp_sdc_rtc - Switch to use %ptR
  rtc: tegra: Switch to use %ptR
  rtc: s5m: Switch to use %ptR
  rtc: s3c: Switch to use %ptR
  rtc: rx8025: Switch to use %ptR
  rtc: rx6110: Switch to use %ptR
  ...

rtc: pcf2123: Add Microcrystal rv2123

2018-12-18T21:53:35+00:00

Add a compatible string for Microcrystal rv2123 as the reset procedure seem
to be differing. However, the current driver works just fine.

Signed-off-by: Alexandre Belloni

dt-bindings: rtc: pcf85363: Document pcf85263 real-time clock

2018-12-10T23:48:16+00:00

The pcf85263 RTC is compatible with the pcf85363 RTC.

The difference between the pcf85263 and pcf85363 RTC is that the latter has
64 bytes more RAM. This renders them incompatible from a DT point of view.

Signed-off-by: Biju Das 
Reviewed-by: Geert Uytterhoeven 
Reviewed-by: Rob Herring 
Reviewed-by: Simon Horman 
Signed-off-by: Alexandre Belloni

dt-bindings: rtc: use a generic node name for ds1307

2018-12-10T23:35:10+00:00

The example should follow the practice or using a generic node name
instead of the precise programming model, as recommended by the DTSpec.

Signed-off-by: Lubomir Rintel 
Signed-off-by: Alexandre Belloni

dt-bindings: rtc: sun6i-rtc: Fix register range in example

2018-12-07T08:55:08+00:00

The register range for the RTC extends beyond 0x54.
Use the size from the user manual's memory map instead.

Fixes: 9765d2d94309 ("rtc: sun6i: Add sun6i RTC driver")
Signed-off-by: Chen-Yu Tsai 
Signed-off-by: Alexandre Belloni

dt-bindings: rtc: sun6i-rtc: Export internal RC oscillator

2018-12-06T17:13:38+00:00

Experiments showed that on at least the H3/H5/A64 the RTC's internal
oscillator also feeds the CPUS mux in the PRCM.

Export this clock through the device tree, instead of having to use
a dummy fixed-clock device node, for the PRCM to consume. This will
properly describe the relationship between the clocks.

Tested-by: Corentin Labbe 
Signed-off-by: Chen-Yu Tsai 
Acked-by: Maxime Ripard 
Signed-off-by: Alexandre Belloni

dt-bindings: rtc: sun6i-rtc: Deprecate external clock output for A31

2018-12-06T17:13:05+00:00

The A31 does not have an external clock output directly from the RTC.
Instead, it has four muxable clock outputs: three (A, B, C) are
controlled from the CCU, and the last (D) is controlled from the PRCM.

Deprecate the usage of the external clock output for the A31 compatible.

Acked-by: Maxime Ripard 
Tested-by: Corentin Labbe 
Signed-off-by: Chen-Yu Tsai 
Signed-off-by: Alexandre Belloni

dt-bindings: rtc: sun6i-rtc: Add compatible strings for pre-H6 variants

2018-12-06T17:12:09+00:00

While doing Bluetooth enablement for various boards based on various
Allwinner SoCs, minor differences in the RTC modules were found. These
include a lack of an external clock output (A31), different internal
oscillator frequencies (H3/H5/A64/V3/V3s), different regulator voltage
settings (H5/H6), and the presence of miscellaneous registers unrelated
to the RTC (A64/R40/H5/H6). The datasheet also describes different number
of registers for non-volatile storage, though based on actual experiments
the actual number is the same across the board.

This patch adds a list of all pre-H6 variants, grouped by the internal
oscillator's clock rate, regulator settings, and the presence of the
external clock output. Combinations are introduced for the variants that
have miscellaneous registers.

The RTC block in the H6 also handles the 24 MHz DCXO. This will require
more device tree binding changes and will be done later.

Acked-by: Maxime Ripard 
Tested-by: Corentin Labbe 
Signed-off-by: Chen-Yu Tsai 
Signed-off-by: Alexandre Belloni

dt-bindings: rtc: sun6i-rtc: Rewrite clock outputs as a list

2018-12-06T17:12:07+00:00

The clock output section for this binding describes the two outputs in
the descriptions for both the #clock-cells and clock-output-names
properties.

Instead of overlapping information that is hard to read, rewrite the
clock outputs as a list of indices and descriptions. The properies
can reference this list instead. This will also make it easier to
add notes or conditions to the clocks, and also for adding new outputs.

Acked-by: Maxime Ripard 
Tested-by: Corentin Labbe 
Signed-off-by: Chen-Yu Tsai 
Signed-off-by: Alexandre Belloni

dt-bindings: rtc: Move trivial RTCs to rtc.txt

2018-12-04T19:31:12+00:00

Move trivial RTCs to the rtc generic binding documentation as they all also
support at least 'start-year'.

Signed-off-by: Alexandre Belloni 
Signed-off-by: Rob Herring