dt-bindings: power: sysc-rmobile: Convert to json-schema

Convert the Renesas R-Mobile System Controller (SYSC) Device Tree
binding documentation to json-schema.

Document missing properties.
Drop consumer example, as it does not belong here.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/22150cfd2ef9d57e84eb53a5dfed8379627a9423.1620119210.git.geert+renesas@glider.be
Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 121 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/power/renesas,sysc-rmobile.yaml b/Documentation/devicetree/bindings/power/renesas,sysc-rmobile.yaml
new file mode 100644
index 000000000000..559718997de7
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/renesas,sysc-rmobile.yaml
@@ -0,0 +1,121 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/renesas,sysc-rmobile.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas R-Mobile System Controller
+
+maintainers:
+  - Geert Uytterhoeven <geert+renesas@glider.be>
+  - Magnus Damm <magnus.damm@gmail.com>
+
+description: |
+  The R-Mobile System Controller provides the following functions:
+    - Boot mode management,
+    - Reset generation,
+    - Power management.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - renesas,sysc-r8a73a4    # R-Mobile APE6
+          - renesas,sysc-r8a7740    # R-Mobile A1
+          - renesas,sysc-sh73a0     # SH-Mobile AG5
+      - const: renesas,sysc-rmobile # Generic SH/R-Mobile
+
+  reg:
+    items:
+      - description: Normally accessible register block
+      - description: Register block protected by the HPB semaphore
+
+  pm-domains:
+    type: object
+    description: |
+      This node contains a hierarchy of PM domain nodes, which should match the
+      Power Area Hierarchy in the Power Domain Specifications section of the
+      device's datasheet.
+
+    properties:
+      '#address-cells':
+        const: 1
+
+      '#size-cells':
+        const: 0
+
+    additionalProperties:
+      $ref: "#/$defs/pd-node"
+
+required:
+  - compatible
+  - reg
+  - pm-domains
+
+additionalProperties: false
+
+$defs:
+  pd-node:
+    type: object
+    description:
+      PM domain node representing a PM domain.  This node hould be named by
+      the real power area name, and thus its name should be unique.
+
+    properties:
+      reg:
+        maxItems: 1
+        description:
+          If the PM domain is not always-on, this property must contain the
+          bit index number for the corresponding power area in the various
+          Power Control and Status Registers.
+          If the PM domain is always-on, this property must be omitted.
+
+      '#address-cells':
+        const: 1
+
+      '#size-cells':
+        const: 0
+
+      '#power-domain-cells':
+        const: 0
+
+    required:
+      - '#power-domain-cells'
+
+    additionalProperties:
+      $ref: "#/$defs/pd-node"
+
+examples:
+  - |
+    // This shows a subset of the r8a7740 PM domain hierarchy, containing the
+    // C5 "always-on" domain, 2 of its subdomains (A4S and A4SU), and the A3SP
+    // domain, which is a subdomain of A4S.
+    sysc: system-controller@e6180000 {
+            compatible = "renesas,sysc-r8a7740", "renesas,sysc-rmobile";
+            reg = <0xe6180000 0x8000>, <0xe6188000 0x8000>;
+
+            pm-domains {
+                    pd_c5: c5 {
+                            #address-cells = <1>;
+                            #size-cells = <0>;
+                            #power-domain-cells = <0>;
+
+                            pd_a4s: a4s@10 {
+                                    reg = <10>;
+                                    #address-cells = <1>;
+                                    #size-cells = <0>;
+                                    #power-domain-cells = <0>;
+
+                                    pd_a3sp: a3sp@11 {
+                                            reg = <11>;
+                                            #power-domain-cells = <0>;
+                                    };
+                            };
+
+                            pd_a4su: a4su@20 {
+                                    reg = <20>;
+                                    #power-domain-cells = <0>;
+                            };
+                    };
+            };
+    };