Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Jiaxun Yang <jiaxun.yang@flygoat.com>
To:     maz@kernel.org
Cc:     Jiaxun Yang <jiaxun.yang@flygoat.com>,
        Rob Herring <robh@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Jason Cooper <jason@lakedaemon.net>,
        Rob Herring <robh+dt@kernel.org>,
        Huacai Chen <chenhc@lemote.com>, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org, linux-mips@vger.kernel.org
Subject: [PATCH v5 6/6] dt-bindings: interrupt-controller: Add Loongson PCH MSI
Date:   Thu, 28 May 2020 23:27:54 +0800
Message-Id: <20200528152757.1028711-7-jiaxun.yang@flygoat.com>
In-Reply-To: <20200528152757.1028711-1-jiaxun.yang@flygoat.com>
References: <20200528152757.1028711-1-jiaxun.yang@flygoat.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Add binding for Loongson PCH MSI controller.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Rob Herring <robh@kernel.org>
--
v5: Add range check for msi-base-vec & msi-num-vecs
---
 .../loongson,pch-msi.yaml                     | 62 +++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/loongson,pch-msi.yaml

diff --git a/Documentation/devicetree/bindings/interrupt-controller/loongson,pch-msi.yaml b/Documentation/devicetree/bindings/interrupt-controller/loongson,pch-msi.yaml
new file mode 100644
index 000000000000..1a5ebbdd219a
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/loongson,pch-msi.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/interrupt-controller/loongson,pch-msi.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Loongson PCH MSI Controller
+
+maintainers:
+  - Jiaxun Yang <jiaxun.yang@flygoat.com>
+
+description:
+  This interrupt controller is found in the Loongson LS7A family of PCH for
+  transforming interrupts from PCIe MSI into HyperTransport vectorized
+  interrupts.
+
+properties:
+  compatible:
+    const: loongson,pch-msi-1.0
+
+  reg:
+    maxItems: 1
+
+  loongson,msi-base-vec:
+    description:
+      u32 value of the base of parent HyperTransport vector allocated
+      to PCH MSI.
+    allOf:
+      - $ref: "/schemas/types.yaml#/definitions/uint32"
+      - minimum: 0
+        maximum: 255
+
+  loongson,msi-num-vecs:
+    description:
+      u32 value of the number of parent HyperTransport vectors allocated
+      to PCH MSI.
+    allOf:
+      - $ref: "/schemas/types.yaml#/definitions/uint32"
+      - minimum: 1
+        maximum: 256
+
+  msi-controller: true
+
+required:
+  - compatible
+  - reg
+  - msi-controller
+  - loongson,msi-base-vec
+  - loongson,msi-num-vecs
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    msi: msi-controller@2ff00000 {
+      compatible = "loongson,pch-msi-1.0";
+      reg = <0x2ff00000 0x4>;
+      msi-controller;
+      loongson,msi-base-vec = <64>;
+      loongson,msi-num-vecs = <64>;
+      interrupt-parent = <&htvec>;
+    };
+...
-- 
2.27.0.rc0