STM32 RTC is capable to handle 3 specific pins of the soc (out1, out2,
out2_rmp) and to outputs 2 signals (LSCO, alarm-a).
This feature is configured thanks to pinmux nodes and pinctrl framework.
This feature is available with compatible st,stm32mp1-rtc and
st,stm32mp25-rtc only.
Signed-off-by: Valentin Caron <valentin.caron@xxxxxxxxxxx>
---
.../devicetree/bindings/rtc/st,stm32-rtc.yaml | 28 +++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml
index 7a0fab721cf1..09221c2f8a0c 100644
--- a/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml
@@ -53,6 +53,28 @@ properties:
override default rtc_ck parent clock phandle of the new parent clock of rtc_ck
maxItems: 1
+patternProperties:
+ "^rtc-[a-z]*-[0-9]+$":
+ type: object
+ $ref: /schemas/pinctrl/pinmux-node.yaml
+ description: |
+ Configuration of STM32 RTC pins description. STM32 RTC is able to output
+ some signals on specific pins:
+ - LSCO (Low Speed Clock Output) that allow to output LSE clock on a pin.
+ - Alarm out that allow to send a pulse on a pin when alarm A of the RTC
+ expires.
+ additionalProperties: false
+ properties:
+ function:
+ enum:
+ - lsco
+ - alarm-a
+ pins:
+ enum:
+ - out1
+ - out2
+ - out2_rmp
+
allOf:
- if:
properties:
@@ -68,6 +90,9 @@ allOf:
clock-names: false
+ patternProperties:
+ "^rtc-[a-z]*-[0-9]+$": false
+
required:
- st,syscfg
@@ -83,6 +108,9 @@ allOf:
minItems: 2
maxItems: 2
+ patternProperties:
+ "^rtc-[a-z]*-[0-9]+$": false
+
required:
- clock-names
- st,syscfg
--
2.25.1
