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[v5,0/6] clockevent: add low power STM32 timer

Message ID 20200331083146.10462-1-benjamin.gaignard@st.com
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Series clockevent: add low power STM32 timer | expand

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Benjamin Gaignard March 31, 2020, 8:31 a.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 5:
- document interrupts and interrupt-names bindings
- use a different wake up interrupt
- add device-tree patch
- make STM32MP157 select low power timer configuration flag
- enable fast_io in regmap configuration

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 (6):
  dt-bindings: mfd: Document STM32 low power timer bindings
  ARM: dts: stm32: Add timer subnodes on stm32mp15 SoCs
  mfd: stm32: Add defines to be used for clkevent purpose
  mfd: stm32: enable regmap fast_io for stm32-lptimer
  clocksource: Add Low Power STM32 timers driver
  ARM: mach-stm32: select low power timer for STM32MP157

 .../devicetree/bindings/mfd/st,stm32-lptimer.yaml  |  34 +++
 arch/arm/boot/dts/stm32mp151.dtsi                  |  45 ++++
 arch/arm/mach-stm32/Kconfig                        |   1 +
 drivers/clocksource/Kconfig                        |   4 +
 drivers/clocksource/Makefile                       |   1 +
 drivers/clocksource/timer-stm32-lp.c               | 231 +++++++++++++++++++++
 drivers/mfd/stm32-lptimer.c                        |   1 +
 include/linux/mfd/stm32-lptimer.h                  |   5 +
 8 files changed, 322 insertions(+)
 create mode 100644 drivers/clocksource/timer-stm32-lp.c