[PATCH robh next] dt-bindings: bus: add Broadcom CRU

[Rafał Miłecki]

From: Rafał Miłecki <rafal at milecki.pl>

CRU is a block used in Northstar devices. It can be seen in the
bcm5301x.dtsi and this binding documents its proper usage.

Signed-off-by: Rafał Miłecki <rafal at milecki.pl>
---
 .../devicetree/bindings/bus/brcm,cru.yaml     | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/bus/brcm,cru.yaml

diff --git a/Documentation/devicetree/bindings/bus/brcm,cru.yaml b/Documentation/devicetree/bindings/bus/brcm,cru.yaml
new file mode 100644
index 000000000000..c3b1ca53a443
--- /dev/null
+++ b/Documentation/devicetree/bindings/bus/brcm,cru.yaml
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bus/brcm,cru.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom CRU
+
+maintainers:
+  - Rafał Miłecki <rafal at milecki.pl>
+
+description: |
+  Broadcom CRU ("Clock and Reset Unit" or "Central Resource Unit") is a hardware
+  block grouping smaller blocks. It contains e.g. clocks, pinctrl, USB PHY and
+  thermal.
+
+allOf:
+  - $ref: /schemas/simple-bus.yaml#
+
+properties:
+  compatible:
+    contains:
+      const: brcm,cru
+
+  reg:
+    description: CRU registers
+
+unevaluatedProperties: false
+
+required:
+  - reg
+
+examples:
+  - |
+    cru-bus at 1800c100 {
+      compatible = "brcm,cru", "simple-bus";
+      reg = <0x1800c100 0x1d0>;
+      ranges;
+      #address-cells = <1>;
+      #size-cells = <1>;
+    };
-- 
2.26.2