Commit 5b19519d authored by Valentin Caron's avatar Valentin Caron Committed by Alexandre Belloni
Browse files

dt-bindings: rtc: stm32: describe pinmux nodes 



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: default avatarValentin Caron <valentin.caron@foss.st.com>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240722160022.454226-2-valentin.caron@foss.st.com


Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent 8400291e

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

+28 −0
Original line number Diff line number Diff line
@@ -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