[PATCH v3 0/4] Support spread spectrum clocking for stm32f{4,7} platforms

[Dario Binacchi]

The series adds support for spread spectrum clocking for stm32f{4,7}
main PLL.

To achieve this, it was considered necessary to also apply patches to
improve the documentation (conversion of `st,stm32-rcc.txt` according to
the json-schema) and the code (use of FIELD helpers).

The series has been tested on the STM32F469I-DISCO board.

Changes in v3:
- Changes to patch 4/4 "clk: stm32f4: support spread spectrum clock generation"
  according to Stephen Boyd's suggestions.

Changes in v2:
- Fixup patches:
  2/6 dt-bindings: reset: st,stm32-rcc: update reference due to rename
  3/6 dt-bindings: clock: stm32fx: update reference due to rename
  to
  1/6 dt-bindings: clock: convert stm32 rcc bindings to json-schema
- Changes to dt-bindings: clock: convert stm32 rcc bindings to json-schema
- Changes to dt-bindings: clock: st,stm32-rcc: support spread spectrum clocking

Dario Binacchi (4):
  dt-bindings: clock: convert stm32 rcc bindings to json-schema
  dt-bindings: clock: st,stm32-rcc: support spread spectrum clocking
  clk: stm32f4: use FIELD helpers to access the PLLCFGR fields
  clk: stm32f4: support spread spectrum clock generation

 .../bindings/clock/st,stm32-rcc.txt           | 138 ----------------
 .../bindings/clock/st,stm32-rcc.yaml          | 147 +++++++++++++++++
 .../bindings/reset/st,stm32-rcc.txt           |   2 +-
 drivers/clk/clk-stm32f4.c                     | 155 +++++++++++++++++-
 include/dt-bindings/clock/stm32fx-clock.h     |   2 +-
 5 files changed, 298 insertions(+), 146 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/clock/st,stm32-rcc.txt
 create mode 100644 Documentation/devicetree/bindings/clock/st,stm32-rcc.yaml

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2.43.0