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dt-bindings: arm: Add virtio transport for SCMI

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Document the properties for arm,scmi-virtio compatible nodes.
The backing virtio SCMI device is described in patch [1].

While doing that, make shmem property required only for pre-existing
mailbox and smc transports, since virtio-scmi does not need it.

[1] https://lists.oasis-open.org/archives/virtio-comment/202102/msg00018.html

Link: https://lore.kernel.org/r/20210803131024.40280-14-cristian.marussi@arm.com
Co-developed-by: Peter Hilber <peter.hilber@opensynergy.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Igor Skalkin <igor.skalkin@opensynergy.com>
[ Peter: Adapted patch for submission to upstream. ]
Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com>
[ Cristian: converted to yaml format, moved shmen required property. ]
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Igor Skalkin 2021-08-03 14:10:22 +01:00 committed by Sudeep Holla
parent 7885281260
commit 60625667c4
1 changed files with 7 additions and 1 deletions
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8
Documentation/devicetree/bindings/firmware/arm,scmi.yaml
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@ -34,6 +34,10 @@ properties:
- description: SCMI compliant firmware with ARM SMC/HVC transport
items:
- const: arm,scmi-smc
- description: SCMI compliant firmware with SCMI Virtio transport.
The virtio transport only supports a single device.
items:
- const: arm,scmi-virtio
interrupts:
description:
@ -172,6 +176,7 @@ patternProperties:
Each sub-node represents a protocol supported. If the platform
supports a dedicated communication channel for a particular protocol,
then the corresponding transport properties must be present.
The virtio transport does not support a dedicated communication channel.
properties:
reg:
@ -195,7 +200,6 @@ patternProperties:
required:
- compatible
- shmem
if:
properties:
@ -209,6 +213,7 @@ then:
required:
- mboxes
- shmem
else:
if:
@ -219,6 +224,7 @@ else:
then:
required:
- arm,smc-id
- shmem
examples:
- |