Commit 0c5453bf authored by Marek Vasut's avatar Marek Vasut Committed by Sudeep Holla
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dt-bindings: firmware: arm,scmi: Document arm,no-completion-irq property 



Document new property arm,no-completion-irq . This optional property
is intended for hardware that does not generate completion interrupts
and can be used to unconditionally enable forced polling mode of
operation.

With this property set, such implementations which do not generate
interrupts can be interacted with, until they are fixed to generate
interrupts properly.

Note that, because the original base protocol exchange also requires
some sort of completion mechanism, it is not possible to query SCMI
itself for this property and it must be described in DT. While this
does look a bit like policy, the SCMI provider is part of the
hardware, hence DT.

Reviewed-by: default avatarRob Herring (Arm) <robh@kernel.org>
Signed-off-by: default avatarMarek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: default avatarCristian Marussi <cristian.marussi@arm.com>
Message-Id: <20260117010241.186685-1-marek.vasut+renesas@mailbox.org>
Signed-off-by: default avatarSudeep Holla <sudeep.holla@kernel.org>
parent 6de23f81

Documentation/devicetree/bindings/firmware/arm,scmi.yaml

+10 −0
Original line number Diff line number Diff line
@@ -146,6 +146,13 @@ properties: 
      this platform. If set, the value should be non-zero.

    minimum: 1



  arm,no-completion-irq:

    type: boolean

    description:

      This optional property is intended for hardware that does not generate

      completion interrupts and can be used to unconditionally enable forced

      polling mode of operation.



  arm,smc-id:

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

    description:
@@ -379,6 +386,9 @@ then: 
    - shmem



else:

  properties:

    arm,no-completion-irq: false



  if:

    properties:

      compatible: