| Message ID | 20240708153434.416287-2-valentin.caron@foss.st.com |
|---|---|
| State | Accepted |
| Headers | show |
| Series | rtc: stm32: introduce new st,stm32mp25-rtc compatible | expand |
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>
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:
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(-)