linux-kernel - [PATCH 1/9] dt-bindings: mailbox: apple,mailbox: Add ASC mailboxes on Apple A11 and T2

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Message-Id: <20250811-t8015-nvme-v1-1-ef9c200e74a7@gmail.com>
Date: Mon, 11 Aug 2025 21:50:53 +0800
From: Nick Chan <towinchenmi@...il.com>
To: Sven Peter <sven@...nel.org>, Janne Grunau <j@...nau.net>, 
 Alyssa Rosenzweig <alyssa@...enzweig.io>, Neal Gompa <neal@...pa.dev>, 
 Jassi Brar <jassisinghbrar@...il.com>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Hector Martin <marcan@...can.st>, 
 Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>, 
 Robin Murphy <robin.murphy@....com>, Keith Busch <kbusch@...nel.org>, 
 Jens Axboe <axboe@...nel.dk>, Christoph Hellwig <hch@....de>, 
 Sagi Grimberg <sagi@...mberg.me>
Cc: asahi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 iommu@...ts.linux.dev, linux-nvme@...ts.infradead.org, 
 Nick Chan <towinchenmi@...il.com>
Subject: [PATCH 1/9] dt-bindings: mailbox: apple,mailbox: Add ASC mailboxes
 on Apple A11 and T2

Add bindings for ASC mailboxes as found on Apple A11 and T2 SoCs. These
mailboxes are used for coprocessors including Secure Enclave Processor
(SEP), the NVMe coprocessor and the system management controller.

Signed-off-by: Nick Chan <towinchenmi@...il.com>
---
 Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml b/Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml
index 474c1a0f99f34777e1bed7fc0a34f89320a93b7c..bdf58f03b84833ecd93a34b91f6262d1706a002d 100644
--- a/Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml
+++ b/Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml
@@ -33,6 +33,13 @@ properties:
               - apple,t6000-asc-mailbox
           - const: apple,asc-mailbox-v4
 
+      - description:
+          An older ASC mailbox interface found on T2 and A11 that is also
+          used for the NVMe coprocessor and the system management
+          controller.
+        items:
+          - const: apple,t8015-asc-mailbox
+
       - description:
           M3 mailboxes are an older variant with a slightly different MMIO
           interface still found on the M1. It is used for the Thunderbolt

-- 
2.50.1