[PATCH 0/3] ARM/arm64: dts: stm32: align watchdog DT support accross STM32MP15 platforms

Antonio Borneo antonio.borneo at foss.st.com
Wed Oct 7 08:13:55 PDT 2026


This series updates STM32MP watchdog DT descriptions to keep them aligned
with the actual secure/non-secure watchdog integration used on each
platform family.

Two watchdog access models are used:
- On ST STM32MP15 non-SCMI boards, IWDG1 is exposed as a non-secure
  watchdog. In that case Linux must register the watchdog device and keep
  it pinged once it has been started by the boot chain.
- On ST SCMI-based STM32MP15 boards, the watchdog is handled through
  secure world services and exposed to Linux through the ARM SMC watchdog
  interface.


Amelie Delaunay (2):
  ARM: dts: stm32: enable iwdg1 on STM32MP15 ST boards
  ARM: dts: stm32: enable ARM SMC watchdog on STM32MP15 SCMI boards

Antonio Borneo (1):
  ARM: dts: stm32: move ARM SMC watchdog to STM32MP151 SoC

 arch/arm/boot/dts/st/stm32mp15-scmi.dtsi       |  4 ++++
 arch/arm/boot/dts/st/stm32mp151.dtsi           | 15 +++++++++++++++
 arch/arm/boot/dts/st/stm32mp157a-dk1-scmi.dts  |  5 +++++
 arch/arm/boot/dts/st/stm32mp157c-dk2-scmi.dts  |  5 +++++
 arch/arm/boot/dts/st/stm32mp157c-ed1-scmi.dts  |  5 +++++
 arch/arm/boot/dts/st/stm32mp157c-ed1.dts       |  5 +++++
 arch/arm/boot/dts/st/stm32mp157c-ev1-scmi.dts  |  5 +++++
 arch/arm/boot/dts/st/stm32mp157f-dk2-scmi.dtsi |  7 -------
 arch/arm/boot/dts/st/stm32mp15xx-dkx.dtsi      |  5 +++++
 9 files changed, 49 insertions(+), 7 deletions(-)


base-commit: f831584128ac2a36fb4fa62fe106793d08c2dbf1
-- 
2.34.1




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