Commit 1d7aff77 authored by Dave Gerlach's avatar Dave Gerlach Committed by Rob Herring
Browse files

dt-bindings: wkup-m3-ipc: Add firmware-name property 



Document that the firmware-name property can be used to indicate a file
contains I2C sequences for PMIC voltage scaling during deep sleep.

Based on previous work by Russ Dill.

Signed-off-by: default avatarDave Gerlach <d-gerlach@ti.com>
Signed-off-by: default avatarKeerthy <j-keerthy@ti.com>
[dfustini: split from driver patch and convert to json-schema]
Signed-off-by: default avatarDrew Fustini <dfustini@baylibre.com>
Signed-off-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220426200741.712842-2-dfustini@baylibre.com
parent 8274c8ea

Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml

+12 −0
Original line number Diff line number Diff line
@@ -40,6 +40,12 @@ description: |+ 
  override the pin's existing bias (pull-up/pull-down) and value (high/low) when

  IO isolation is active.



  Support for I2C PMIC Voltage Scaling

  ====================================

  It is possible to pass the name of a binary file to load into the CM3 memory.

  The binary data is the I2C sequences for the CM3 to send out to the PMIC

  during low power mode entry.



properties:

  compatible:

    enum:
@@ -67,6 +73,10 @@ properties: 
      mbox_wkupm3 child node.

    maxItems: 1



  firmware-name:

    description:

      Name of binary file with I2C sequences for PMIC voltage scaling



  ti,vtt-gpio-pin:

    $ref: /schemas/types.yaml#/definitions/uint32

    description: GPIO pin connected to enable pin on VTT regulator
@@ -117,6 +127,7 @@ examples: 
           ti,rproc = <&wkup_m3>;

           mboxes = <&am335x_mailbox &mbox_wkupm3>;

           ti,vtt-gpio-pin = <7>;

           firmware-name = "am335x-evm-scale-data.bin";

        };

    };
@@ -157,6 +168,7 @@ examples: 
           ti,rproc = <&wkup_m3>;

           mboxes = <&am437x_mailbox &mbox_wkupm3>;

           ti,set-io-isolation;

           firmware-name = "am43x-evm-scale-data.bin";

        };

    };