[v4,0/3] clockevent: add low power STM32 timer

Message

Benjamin GAIGNARD Feb. 17, 2020, 1:45 p.m. UTC

This series add low power timer as boadcast clockevent device.
Low power timer could runs even when CPUs are in idle mode and 
could wakeup them.

version 4:
- move defines in mfd/stm32-lptimer.h
- change compatible and subnode names
- document wakeup-source property
- reword commit message
- make driver Kconfig depends of MFD_STM32_LPTIMER
- remove useless include
- remove rate and clk fields from the private structure
- to add comments about the registers sequence in stm32_clkevent_lp_set_timer
- rework probe function and use devm_request_irq()
- do not allow module to be removed

version 3:
- fix timer set sequence
- don't forget to free irq on remove function
- use devm_kzalloc to simplify errors handling in probe function

version 2:
- stm32 clkevent driver is now a child of the stm32 lp timer node
- add a probe function and adpat the driver to use regmap provide
  by it parent
- stop using timer_of helpers


Benjamin Gaignard (3):
  dt-bindings: mfd: Document STM32 low power timer bindings
  mfd: stm32: Add defines to be used for clkevent purpose
  clocksource: Add Low Power STM32 timers driver

 .../devicetree/bindings/mfd/st,stm32-lptimer.yaml  |  16 ++
 drivers/clocksource/Kconfig                        |   7 +
 drivers/clocksource/Makefile                       |   1 +
 drivers/clocksource/timer-stm32-lp.c               | 213 +++++++++++++++++++++
 include/linux/mfd/stm32-lptimer.h                  |   5 +
 5 files changed, 242 insertions(+)
 create mode 100644 drivers/clocksource/timer-stm32-lp.c