From: Peng Fan <peng.fan@xxxxxxx>
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@xxxxxxx>
---
Documentation/devicetree/bindings/firmware/arm,scmi.yaml | 12 ++++++++----
1 file 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:
--
2.37.1
