[v4,0/8] Add STM32MP25 LPTIM support: MFD, PWM, IIO, counter, clocksource

Message

Fabrice Gasnier March 14, 2025, 5:14 p.m. UTC

This series adds support for STM32MP25 to MFD PWM, IIO, counter and
clocksource low-power timer (LPTIM) drivers.
This new variant is managed by using a new DT compatible string, hardware
configuration and version registers.
It comes with a slightly updated register set, some new features and new
interconnect signals inside the SoC.
Same feature list as on STM32MP1x is supported currently.
The device tree files add all instances in stm32mp251 dtsi file.

Changes in V4
---
- Simplify IIO trigger driver as per Jonathan's comments.
- Rework clocksource driver: encapsulate mp25 changes in separate function
  after Daniel's suggestion.
- Add some definitions to MFD header.

Changes in V3
---
- Yaml indentation issue fixed, reported by Rob's bot

Changes in V2
---
- Review comments from Krzysztof
  - Adopt compatible fallback in dt-bindings and driver
  - drivers: drop "st,stm32mp25-..." compatibles when unused (e.g. no .data)
  - counter driver: no update (patch dropped)
  - defconfig: only enable the necessary config for upstream board
  - add lptimer DT node in stm32mp257f-ev1 board
- Add missing management of IER access for stm32mp25

Fabrice Gasnier (7):
  dt-bindings: mfd: stm32-lptimer: add support for stm32mp25
  mfd: stm32-lptimer: add support for stm32mp25
  clocksource: stm32-lptimer: add support for stm32mp25
  pwm: stm32-lp: add support for stm32mp25
  arm64: defconfig: enable STM32 LP timer clockevent driver
  arm64: dts: st: add low-power timer nodes on stm32mp251
  arm64: dts: st: use lptimer3 as tick broadcast source on
    stm32mp257f-ev1

Olivier Moysan (1):
  iio: trigger: stm32-lptimer: add support for stm32mp25

 .../bindings/mfd/st,stm32-lptimer.yaml        |  40 +++-
 arch/arm64/boot/dts/st/stm32mp251.dtsi        | 177 ++++++++++++++
 arch/arm64/boot/dts/st/stm32mp257f-ev1.dts    |   8 +
 arch/arm64/configs/defconfig                  |   2 +
 drivers/clocksource/timer-stm32-lp.c          |  51 +++-
 drivers/iio/trigger/stm32-lptimer-trigger.c   |  75 ++++--
 drivers/mfd/stm32-lptimer.c                   |  33 ++-
 drivers/pwm/pwm-stm32-lp.c                    | 219 +++++++++++++++---
 include/linux/iio/timer/stm32-lptim-trigger.h |   9 +
 include/linux/mfd/stm32-lptimer.h             |  37 ++-
 10 files changed, 594 insertions(+), 57 deletions(-)