diff options
| author | Peng Fan <peng.fan@nxp.com> | 2024-05-10 11:19:47 +0800 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2024-06-14 09:48:35 +0100 |
| commit | d0398f51ffb3f706f38b235c7bb17da8658e3392 (patch) | |
| tree | db84fe2770dc66ed107a987163a2b3c860c9cbfa /Documentation/devicetree/bindings/firmware/arm,scmi.yaml | |
| parent | dd22cc907a749ff34526e5b22a664d674f71c3de (diff) | |
dt-bindings: firmware: arm,scmi: Add support for notification completion channel
Per System Control Management Interface specification:
"Completion interrupts: This transport supports polling or interrupt driven
modes of communication. In interrupt mode, when the callee completes
processing a message, it raises an interrupt to the caller. Hardware
support for completion interrupts is optional."
So, add an optional mailbox channel for notification completion interrupts.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20240510-scmi-notify-v2-1-e994cf14ef86@nxp.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'Documentation/devicetree/bindings/firmware/arm,scmi.yaml')
| -rw-r--r-- | Documentation/devicetree/bindings/firmware/arm,scmi.yaml | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml index 7de2c29606e5..308af58180d1 100644 --- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml +++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml @@ -72,14 +72,17 @@ properties: - const: tx - const: tx_reply - const: rx + - const: rx_reply minItems: 2 mboxes: description: List of phandle and mailbox channel specifiers. It should contain - exactly one, two or three mailboxes; the first one or two for transmitting - messages ("tx") and another optional ("rx") for receiving notifications - and delayed responses, if supported by the platform. + exactly one, two, three or four mailboxes; the first one or two for + transmitting messages ("tx") and another optional ("rx") for receiving + notifications and delayed responses, if supported by the platform. + The optional ("rx_reply") is for notifications completion interrupt, + if supported by the platform. The number of mailboxes needed for transmitting messages depends on the type of channels exposed by the specific underlying mailbox controller; one single channel descriptor is enough if such channel is bidirectional, @@ -92,9 +95,10 @@ properties: 2 mbox / 2 shmem => SCMI TX and RX over 2 mailbox bidirectional channels 2 mbox / 1 shmem => SCMI TX over 2 mailbox unidirectional channels 3 mbox / 2 shmem => SCMI TX and RX over 3 mailbox unidirectional channels + 4 mbox / 2 shmem => SCMI TX and RX over 4 mailbox unidirectional channels Any other combination of mboxes and shmem is invalid. minItems: 1 - maxItems: 3 + maxItems: 4 shmem: description: |