[PATCH v2 1/2] dt-bindings: arm: keystone: add missing items to mboxes

[Anshul Dalal]

The mailboxes for the ti,sci node were not documented, this patch adds
the description for the two channel entries as per TI-SCI spec[1].

[1]:
https://software-dl.ti.com/tisci/esd/latest/5_soc_doc/am65x/sec_proxy.html

Signed-off-by: Anshul Dalal <anshuld at ti.com>
---
 Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml b/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml
index 25a2b42105e541cb3c8ad12a0dfec1af038fa907..182915c34fc1429fb627ac44c99c0c76fdf28e0f 100644
--- a/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml
+++ b/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml
@@ -60,6 +60,12 @@ properties:
 
   mboxes:
     minItems: 2
+    description: |
+      List of phandles to mailbox channels used for receiving and transmitting
+      data from and to the TI-SCI Controller.
+    items:
+      - description: RX thread
+      - description: TX thread
 
   ti,host-id:
     $ref: /schemas/types.yaml#/definitions/uint32

-- 
2.51.0