linux-kernel - [PATCH v2 2/4] dt-bindings: arm: scmi property mboxes is not mandatory

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Date:   Fri, 21 May 2021 15:40:52 +0200
From:   Etienne Carriere <etienne.carriere@...aro.org>
To:     linux-kernel@...r.kernel.org
Cc:     linux-arm-kernel@...ts.infradead.org,
        Sudeep Holla <sudeep.holla@....com>,
        Cristian Marussi <cristian.marussi@....com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Etienne Carriere <etienne.carriere@...aro.org>,
        Rob Herring <robh@...nel.org>, devicetree@...r.kernel.org
Subject: [PATCH v2 2/4] dt-bindings: arm: scmi property mboxes is not mandatory

Since "arm,scmi-smc" compatible support, mboxes property is not mandated.
This change fixes the DT bindings description accordingly.

Cc: Rob Herring <robh@...nel.org>
Cc: devicetree@...r.kernel.org
Signed-off-by: Etienne Carriere <etienne.carriere@...aro.org>
---
Changes since v1:
 - New patch is the series. Addresses mboxes propery description.
---
 Documentation/devicetree/bindings/arm/arm,scmi.txt | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/arm,scmi.txt b/Documentation/devicetree/bindings/arm/arm,scmi.txt
index 667d58e0a659..856d041b397e 100644
--- a/Documentation/devicetree/bindings/arm/arm,scmi.txt
+++ b/Documentation/devicetree/bindings/arm/arm,scmi.txt
@@ -15,10 +15,10 @@ Required properties:
 The scmi node with the following properties shall be under the /firmware/ node.
 
 - compatible : shall be "arm,scmi" or "arm,scmi-smc" for smc/hvc transports
-- mboxes: List of phandle and mailbox channel specifiers. It should contain
-	  exactly one or two mailboxes, one for transmitting messages("tx")
-	  and another optional for receiving the notifications("rx") if
-	  supported.
+- mboxes: List of phandle and mailbox channel specifiers. When used, it should
+	  contain exactly one or two mailboxes, one for transmitting messages
+	  ("tx") and another optional for receiving the notifications("rx") if
+	  supported. Mandated by compatible "arm,scmi".
 - shmem : List of phandle pointing to the shared memory(SHM) area as per
 	  generic mailbox client binding.
 - #address-cells : should be '1' if the device has sub-nodes, maps to
-- 
2.17.1