Commit 1746a61a authored by Valentin Caron's avatar Valentin Caron Committed by Alexandre Belloni
Browse files

dt-bindings: rtc: stm32: introduce new st,stm32mp25-rtc compatible 

Introduce new st,stm32mp25-rtc compatible. It is based on st,stm32mp1-rtc.

Difference is that stm32mp25 soc implements a triple protection on RTC
registers:
- Secure bit based protection
- Privileged context based protection
- Compartment ID filtering based protection
This driver will now check theses configurations before probing to avoid
exceptions and fake reads on register.

Link: https://www.st.com/resource/en/reference_manual/rm0457-stm32mp25xx-advanced-armbased-3264bit-mpus-stmicroelectronics.pdf#page=4081


Signed-off-by: default avatarValentin Caron <valentin.caron@foss.st.com>
Reviewed-by: default avatarRob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20240708153434.416287-2-valentin.caron@foss.st.com


Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent a47d377e

Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml

+4 −1
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ properties: 
      - st,stm32-rtc

      - st,stm32h7-rtc

      - st,stm32mp1-rtc

      - st,stm32mp25-rtc



  reg:

    maxItems: 1
@@ -90,7 +91,9 @@ allOf: 
      properties:

        compatible:

          contains:

            const: st,stm32mp1-rtc

            enum:

              - st,stm32mp1-rtc

              - st,stm32mp25-rtc



    then:

      properties: