[PATCH v5 07/10] dt-bindings: interrupt-controller: Add Sophgo sg2042 CLINT mswi

Chen Wang
2023-10-07T07:56:40Z

From: Inochi Amaoto <inochiama@outlook.com>

The clint of Sophgo's sg2042 is based off IP designed by T-HEAD, and
implements the not yet frozen ACLINT spec. This spec seems to be
abandoned, and will not be frozen in the predictable future.
Frozen specs required by the RISC-V maintainers before merging content
relating to those extensions, therefore a generic compatible is not
appropriate.
Instead, add new vendor specific compatible strings to identify mswi of
sg2042 clint.

Signed-off-by: Inochi Amaoto <inochiama@outlook.com>
Signed-off-by: Chen Wang <unicorn_wang@outlook.com>
[conor: re-wrote commit message to drop irrelevant sifive,clint discussion]
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
.../thead,c900-aclint-mswi.yaml | 43 +++++++++++++++++++
1 file changed, 43 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/thead,c900-aclint-mswi.yaml

diff --git a/Documentation/devicetree/bindings/interrupt-controller/thead,c900-aclint-mswi.yaml b/Documentation/devicetree/bindings/interrupt-controller/thead,c900-aclint-mswi.yaml
new file mode 100644
index 000000000000..065f2544b63b
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/thead,c900-aclint-mswi.yaml
@@ -0,0 +1,43 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/thead,c900-aclint-mswi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sophgo sg2042 CLINT Machine-level Software Interrupt Device
+
+maintainers:
+ - Inochi Amaoto <inochiama@outlook.com>
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - sophgo,sg2042-aclint-mswi
+ - const: thead,c900-aclint-mswi
+
+ reg:
+ maxItems: 1
+
+ interrupts-extended:
+ minItems: 1
+ maxItems: 4095
+
+additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - interrupts-extended
+
+examples:
+ - |
+ interrupt-controller@94000000 {
+ compatible = "sophgo,sg2042-aclint-mswi", "thead,c900-aclint-mswi";
+ interrupts-extended = <&cpu1intc 3>,
+ <&cpu2intc 3>,
+ <&cpu3intc 3>,
+ <&cpu4intc 3>;
+ reg = <0x94000000 0x00010000>;
+ };
+...