linux-kernel - [PATCH v6 02/12] dt-bindings: soc/microchip: add services as sub devs of sys ctrlr

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Date:   Mon, 7 Feb 2022 16:26:28 +0000
From:   <conor.dooley@...rochip.com>
To:     <linus.walleij@...aro.org>, <brgl@...ev.pl>, <robh+dt@...nel.org>,
        <jassisinghbrar@...il.com>, <thierry.reding@...il.com>,
        <u.kleine-koenig@...gutronix.de>, <lee.jones@...aro.org>,
        <a.zummo@...ertech.it>, <alexandre.belloni@...tlin.com>,
        <paul.walmsley@...ive.com>, <palmer@...belt.com>,
        <aou@...s.berkeley.edu>, <geert@...ux-m68k.org>,
        <krzysztof.kozlowski@...onical.com>, <linux-gpio@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-i2c@...r.kernel.org>, <linux-pwm@...r.kernel.org>,
        <linux-rtc@...r.kernel.org>, <linux-riscv@...ts.infradead.org>
CC:     <bin.meng@...driver.com>, <heiko@...ech.de>,
        <lewis.hanly@...rochip.com>, <conor.dooley@...rochip.com>,
        <daire.mcnamara@...rochip.com>, <ivan.griffin@...rochip.com>,
        <atishp@...osinc.com>, Palmer Dabbelt <palmer@...osinc.com>
Subject: [PATCH v6 02/12] dt-bindings: soc/microchip: add services as sub devs of sys ctrlr

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

Document mpfs-rng and mpfs-generic-service as subdevices of the system
controller.

Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
Acked-by: Palmer Dabbelt <palmer@...osinc.com>
---
 .../microchip,mpfs-sys-controller.yaml        | 35 +++++++++++++++++--
 1 file changed, 33 insertions(+), 2 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..b02c8bd72605 100644
--- a/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
+++ b/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
@@ -13,7 +13,6 @@ 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
@@ -21,6 +20,38 @@ properties:
   compatible:
     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
   - mboxes
@@ -29,7 +60,7 @@ additionalProperties: false
 
 examples:
   - |
-    syscontroller: syscontroller {
+    syscontroller {
       compatible = "microchip,mpfs-sys-controller";
       mboxes = <&mbox 0>;
     };
-- 
2.35.1