[PATCH v3 3/3] dt-bindings: i3c: Add AST2600 I3C global registers

Dawid Glazik
2026-04-08T19:42:10Z

Introduce the device-tree bindings for I3C global registers found on
AST2600 SoCs.

Signed-off-by: Dawid Glazik <dawid.glazik@linux.intel.com>
---
I wasn't sure if I should add newline at the end of the
file or not so I took
https://github.com/torvalds/linux/tree/master/Documentation/devicetree/bindings/i3c
as an example.
---
.../i3c/aspeed,ast2600-i3c-global.yaml | 55 +++++++++++++++++++
1 file changed, 55 insertions(+)
create mode 100644 Documentation/devicetree/bindings/i3c/aspeed,ast2600-i3c-global.yaml

diff --git a/Documentation/devicetree/bindings/i3c/aspeed,ast2600-i3c-global.yaml b/Documentation/devicetree/bindings/i3c/aspeed,ast2600-i3c-global.yaml
new file mode 100644
index 000000000000..edecc18796a9
--- /dev/null
+++ b/Documentation/devicetree/bindings/i3c/aspeed,ast2600-i3c-global.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i3c/aspeed,ast2600-i3c-global.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASPEED AST2600 I3C Global Registers
+
+description: |
+ The AST2600 SoC provides a shared I3C global register block used by all
+ I3C controller instances. This block contains per-instance global
+ configuration fields, including controller instance ID and SDA pull-up
+ configuration.
+ Each I3C controller references this syscon node through the
+ aspeed,global-regs property.
+
+maintainers:
+ - Dawid Glazik <dawid.glazik@linux.intel.com>
+
+allOf:
+ - $ref: /schemas/mfd/syscon-common.yaml#
+
+properties:
+ compatible:
+ items:
+ - const: aspeed,ast2600-i3c-global
+ - const: syscon
+
+ reg:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ bus@1e7a0000 {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0 0x1e7a0000 0x8000>;
+
+ i3c-global@0 {
+ compatible = "aspeed,ast2600-i3c-global", "syscon";
+ reg = <0x0 0x1000>;
+ resets = <&syscon ASPEED_RESET_I3C_DMA>;
+ };
+ };
+...
\ No newline at end of file
--
2.43.0