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From:   Devarsh Thakkar <devarsht@ti.com>
To:     <andersson@kernel.org>, <mathieu.poirier@linaro.org>,
        <p.zabel@pengutronix.de>, <linux-remoteproc@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
        <s-anna@ti.com>
CC:     <robh+dt@kernel.org>, <krzysztof.kozlowski+dt@linaro.org>,
        <hnagalla@ti.com>, <praneeth@ti.com>, <nm@ti.com>,
        <vigneshr@ti.com>, <a-bhatia1@ti.com>, <j-luthra@ti.com>
Subject: [PATCH v2 1/2] Documentation: dt-bindings: k3-r5f-rproc: Add new compatible for AM62 SoC family
Date:   Wed, 30 Nov 2022 19:10:51 +0530
Message-ID: <20221130134052.7513-2-devarsht@ti.com>
In-Reply-To: <20221130134052.7513-1-devarsht@ti.com>
References: <20221130134052.7513-1-devarsht@ti.com>
MIME-Version: 1.0
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AM62 family of devices don't have a R5F cluster, instead
they have single core DM R5F.
Add new compatible string ti,am62-r5fss to support this scenario.

When this new compatible is used don't allow cluster-mode
property usage in device-tree as this implies that there
is no R5F cluster available and only single R5F core
is present.

Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
---
V2: Avoid acronyms, use "Device Manager" instead of "DM"
---
 .../bindings/remoteproc/ti,k3-r5f-rproc.yaml  | 48 +++++++++++++------
 1 file changed, 34 insertions(+), 14 deletions(-)

diff --git a/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
index fb9605f0655b..91357635025a 100644
--- a/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
@@ -21,6 +21,9 @@ description: |
   called "Single-CPU" mode, where only Core0 is used, but with ability to use
   Core1's TCMs as well.
 
+  AM62 SoC family support a single R5F core only which runs Device Manager
+  firmware and can also be used as a remote processor with IPC communication.
+
   Each Dual-Core R5F sub-system is represented as a single DTS node
   representing the cluster, with a pair of child DT nodes representing
   the individual R5F cores. Each node has a number of required or optional
@@ -28,6 +31,9 @@ description: |
   the device management of the remote processor and to communicate with the
   remote processor.
 
+  Since AM62 SoC family only support a single core, there is no cluster-mode
+  property setting required for it.
+
 properties:
   $nodename:
     pattern: "^r5fss(@.*)?"
@@ -38,6 +44,7 @@ properties:
       - ti,j721e-r5fss
       - ti,j7200-r5fss
       - ti,am64-r5fss
+      - ti,am62-r5fss
       - ti,j721s2-r5fss
 
   power-domains:
@@ -80,7 +87,8 @@ patternProperties:
       node representing a TI instantiation of the Arm Cortex R5F core. There
       are some specific integration differences for the IP like the usage of
       a Region Address Translator (RAT) for translating the larger SoC bus
-      addresses into a 32-bit address space for the processor.
+      addresses into a 32-bit address space for the processor. For AM62x,
+      should only define one R5F child node as it has only one core available.
 
       Each R5F core has an associated 64 KB of Tightly-Coupled Memory (TCM)
       internal memories split between two banks - TCMA and TCMB (further
@@ -104,6 +112,7 @@ patternProperties:
           - ti,j721e-r5f
           - ti,j7200-r5f
           - ti,am64-r5f
+          - ti,am62-r5f
           - ti,j721s2-r5f
 
       reg:
@@ -207,20 +216,31 @@ patternProperties:
       - firmware-name
 
     unevaluatedProperties: false
+allOf:
+  - if:
+      properties:
+        compatible:
+          enum:
+            - ti,am64-r5fss
+    then:
+      properties:
+        ti,cluster-mode:
+          enum: [0, 2]
+
+    else:
+      properties:
+        ti,cluster-mode:
+          enum: [0, 1]
+
+  - if:
+      properties:
+        compatible:
+          enum:
+            - ti,am62-r5fss
+    then:
+      properties:
+        ti,cluster-mode: false
 
-if:
-  properties:
-    compatible:
-      enum:
-        - ti,am64-r5fss
-then:
-  properties:
-    ti,cluster-mode:
-      enum: [0, 2]
-else:
-  properties:
-    ti,cluster-mode:
-      enum: [0, 1]
 
 required:
   - compatible
-- 
2.17.1