linux-kernel - [PATCH v4 1/2] dt-bindings: arm: Add optional interrupt to smc/hvc SCMI transport

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Date:   Tue, 22 Dec 2020 09:56:02 -0500
From:   Jim Quinlan <jim2101024@...il.com>
To:     Sudeep Holla <sudeep.holla@....com>,
        bcm-kernel-feedback-list@...adcom.com, jim2101024@...il.com,
        james.quinlan@...adcom.com
Cc:     Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org (open list:SYSTEM CONTROL &
        POWER/MANAGEMENT INTERFACE Mes...),
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v4 1/2] dt-bindings: arm: Add optional interrupt to smc/hvc SCMI transport

In normal use of smc/hvc transport in SCMI the message completion is
indicated by the return of the SMC call.  This commit provides for an
optional interrupt named "a2p" which is used instead to
indicate the completion of a message.

Signed-off-by: Jim Quinlan <jim2101024@...il.com>
---
 Documentation/devicetree/bindings/arm/arm,scmi.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/arm,scmi.txt b/Documentation/devicetree/bindings/arm/arm,scmi.txt
index b5ce5b39bb9c..667d58e0a659 100644
--- a/Documentation/devicetree/bindings/arm/arm,scmi.txt
+++ b/Documentation/devicetree/bindings/arm/arm,scmi.txt
@@ -31,6 +31,14 @@ Optional properties:
 
 - mbox-names: shall be "tx" or "rx" depending on mboxes entries.
 
+- interrupts : when using smc or hvc transports, this optional
+	 property indicates that msg completion by the platform is indicated
+	 by an interrupt rather than by the return of the smc call. This
+	 should not be used except when the platform requires such behavior.
+
+- interrupt-names : if "interrupts" is present, interrupt-names must also
+	 be present and have the value "a2p".
+
 See Documentation/devicetree/bindings/mailbox/mailbox.txt for more details
 about the generic mailbox controller and client driver bindings.
 
-- 
2.17.1