| Message ID | 20240611161958.469209-2-valentin.caron@foss.st.com |
|---|---|
| State | New |
| Headers | show |
| Series | rtc: stm32: introduce new st,stm32mp25-rtc compatible | expand |
On Tue, Jun 11, 2024 at 06:19:57PM +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(-) > > diff --git a/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml > index 4703083d1f11f..65a8a93ef5753 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 > + anyOf: > + - const: st,stm32mp1-rtc anyOf: - const: foo - const: bar is just the same as using enum: - foo - bar Thanks, Conor. > + - const: st,stm32mp25-rtc > > then: > properties: > -- > 2.25.1 >
diff --git a/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml index 4703083d1f11f..65a8a93ef5753 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 + anyOf: + - const: st,stm32mp1-rtc + - const: 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(-)