linux-kernel - [RFC PATCH 2/4] dt-bindings: firmware: thead,th1520-aon: add a mailbox name for SBI

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Message-ID: <20250814070757.2267325-3-uwu@icenowy.me>
Date: Thu, 14 Aug 2025 15:07:55 +0800
From: Icenowy Zheng <uwu@...nowy.me>
To: Drew Fustini <fustini@...nel.org>,
	Guo Ren <guoren@...nel.org>,
	Fu Wei <wefu@...hat.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Jassi Brar <jassisinghbrar@...il.com>,
	Michal Wilczynski <m.wilczynski@...sung.com>
Cc: Han Gao <rabenda.cn@...il.com>,
	Inochi Amaoto <inochiama@...il.com>,
	Yao Zi <ziyao@...root.org>,
	linux-riscv@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Icenowy Zheng <uwu@...nowy.me>
Subject: [RFC PATCH 2/4] dt-bindings: firmware: thead,th1520-aon: add a mailbox name for SBI

The SBI firmware might want to communicate to the AON firmware too.

Add a mbox-name item to allow to allocate a mailbox for SBI.

Signed-off-by: Icenowy Zheng <uwu@...nowy.me>
---
 .../devicetree/bindings/firmware/thead,th1520-aon.yaml     | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml b/Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml
index 3365124c7fd47..555465f4aab4e 100644
--- a/Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml
+++ b/Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml
@@ -26,11 +26,12 @@ properties:
     const: thead,th1520-aon
 
   mboxes:
-    maxItems: 1
+    maxItems: 2
 
   mbox-names:
     items:
       - const: aon
+      - const: aon-for-sbi
 
   resets:
     maxItems: 1
@@ -54,7 +55,7 @@ examples:
   - |
     aon: aon {
         compatible = "thead,th1520-aon";
-        mboxes = <&mbox_910t 1>;
-        mbox-names = "aon";
+        mboxes = <&mbox_910t 1>, <&mbox_910r 1>;
+        mbox-names = "aon", "aon-for-sbi";
         #power-domain-cells = <1>;
     };
-- 
2.50.1