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: Valentin Caron <valentin.caron@foss.st.com>
---
 Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml
index 4703083d1f11..7a0fab721cf1 100644
--- a/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml
@@ -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:
-- 
2.25.1

On Mon, 08 Jul 2024 17:34:33 +0200, Valentin Caron wrote:
> 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: Valentin Caron <valentin.caron@foss.st.com>
> ---
>  Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>