linux-kernel - [PATCH 2/9] dt-bindings: soc: apple: Add ANS NVMe

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Message-Id: <20220321165049.35985-3-sven@svenpeter.dev>
Date:   Mon, 21 Mar 2022 17:50:42 +0100
From:   Sven Peter <sven@...npeter.dev>
To:     Rob Herring <robh+dt@...nel.org>
Cc:     Sven Peter <sven@...npeter.dev>, Hector Martin <marcan@...can.st>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Arnd Bergmann <arnd@...db.de>, Keith Busch <kbusch@...nel.org>,
        Jens Axboe <axboe@...com>, Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        Marc Zyngier <maz@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-nvme@...ts.infradead.org
Subject: [PATCH 2/9] dt-bindings: soc: apple: Add ANS NVMe

Apple SoCs such as the M1 come with an embedded NVMe coprocessor called
ANS2.

Signed-off-by: Sven Peter <sven@...npeter.dev>
---
 .../bindings/soc/apple/apple,nvme-ans.yaml    | 75 +++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/apple/apple,nvme-ans.yaml

diff --git a/Documentation/devicetree/bindings/soc/apple/apple,nvme-ans.yaml b/Documentation/devicetree/bindings/soc/apple/apple,nvme-ans.yaml
new file mode 100644
index 000000000000..e1f4c1c572aa
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/apple/apple,nvme-ans.yaml
@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/apple/apple,nvme-ans.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple ANS NVM Express host controller
+
+maintainers:
+  - Sven Peter <sven@...npeter.dev>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - apple,t8103-nvme-ans2
+          - apple,t6000-nvme-ans2
+      - const: apple,nvme-ans2
+
+  reg:
+    items:
+      - description: NVMe and NVMMU registers
+      - description: ANS2 co-processor control registers
+
+  reg-names:
+    items:
+      - const: nvme
+      - const: ans
+
+  resets:
+    maxItems: 1
+
+  power-domains: true
+
+  mboxes:
+    maxItems: 1
+    description: Mailbox of the ANS2 co-processor
+
+  interrupts:
+    maxItems: 1
+
+  apple,sart:
+    maxItems: 1
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: |
+      Reference to the SART address filter.
+
+      The SART address filter is documented in apple,sart.yaml.
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - resets
+  - mboxes
+  - interrupts
+  - apple,sart
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/apple-aic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    nvme@...c0000 {
+      compatible = "apple,t8103-nvme-ans2", "apple,nvme-ans2";
+      reg = <0x7bcc0000 0x40000>, <0x77400000 0x4000>;
+      reg-names = "nvme", "ans";
+      interrupts = <AIC_IRQ 590 IRQ_TYPE_LEVEL_HIGH>;
+      mboxes = <&ans>;
+      apple,sart = <&sart>;
+      power-domains = <&ps_ans2>;
+      resets = <&ps_ans2>;
+     };
-- 
2.25.1