[PATCH v4 02/14] dt-bindings: soc/microchip: add services as children of sys ctrlr

[<conor.dooley@microchip.com>]

From: Conor Dooley <conor.dooley@microchip.com>

Add mpfs-rng and mpfs-generic-services as children of the system
controller.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
 .../microchip,mpfs-sys-controller.yaml        | 44 +++++++++++++++++--
 1 file changed, 41 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml b/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
index f699772fedf3..b69386b1a3e1 100644
--- a/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
+++ b/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
@@ -13,13 +13,45 @@ description: |
   The PolarFire SoC system controller is communicated with via a mailbox.
   This document describes the bindings for the client portion of that mailbox.
 
-
 properties:
   mboxes:
     maxItems: 1
 
   compatible:
-    const: microchip,mpfs-sys-controller
+    items:
+      - const: microchip,mpfs-sys-controller
+
+  rng:
+    type: object
+
+    description: |
+      The hardware random number generator on the Polarfire SoC is
+      accessed via the mailbox interface provided by the system controller
+
+    properties:
+      compatible:
+        const: microchip,mpfs-rng
+
+    required:
+      - compatible
+
+  sysserv:
+    type: object
+
+    description: |
+      The PolarFire SoC system controller is communicated with via a mailbox.
+      This binding represents several of the functions provided by the system
+      controller which do not belong in a specific subsystem, such as reading
+      the fpga device certificate, all of which follow the same format:
+        - a command + optional payload sent to the sys controller
+        - a status + a payload returned to Linux
+
+    properties:
+      compatible:
+        const: microchip,mpfs-generic-service
+
+    required:
+      - compatible
 
 required:
   - compatible
@@ -29,7 +61,13 @@ additionalProperties: false
 
 examples:
   - |
-    syscontroller: syscontroller {
+    syscontroller {
       compatible = "microchip,mpfs-sys-controller";
       mboxes = <&mbox 0>;
+      rng: rng {
+        compatible = "microchip,mpfs-rng";
+      };
+      sysserv: sysserv {
+        compatible = "microchip,mpfs-generic-service";
+      };
     };
-- 
2.32.0