linux-kernel - [PATCH 1/2] dt-bindings: reserved-memory: rmtfs: Allow dynamic allocation

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Message-ID: <20230530193436.3833889-2-quic_bjorande@quicinc.com>
Date:   Tue, 30 May 2023 12:34:35 -0700
From:   Bjorn Andersson <quic_bjorande@...cinc.com>
To:     Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
CC:     <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] dt-bindings: reserved-memory: rmtfs: Allow dynamic allocation

Allow instances of the qcom,rmtfs-mem either be defined as a
reserved-memory regoin, or just standalone given just a size.

This relieve the DeviceTree source author the need to come up with a
static memory region for the region.

Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
---
 .../reserved-memory/qcom,rmtfs-mem.yaml       | 23 ++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/reserved-memory/qcom,rmtfs-mem.yaml b/Documentation/devicetree/bindings/reserved-memory/qcom,rmtfs-mem.yaml
index bab982f00485..8b5de033f9ac 100644
--- a/Documentation/devicetree/bindings/reserved-memory/qcom,rmtfs-mem.yaml
+++ b/Documentation/devicetree/bindings/reserved-memory/qcom,rmtfs-mem.yaml
@@ -14,13 +14,16 @@ description: |
 maintainers:
   - Bjorn Andersson <bjorn.andersson@...aro.org>
 
-allOf:
-  - $ref: reserved-memory.yaml
-
 properties:
   compatible:
     const: qcom,rmtfs-mem
 
+  qcom,alloc-size:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Requested size of the rmtfs memory allocation, when not defined as a
+      reserved-memory region.
+
   qcom,client-id:
     $ref: /schemas/types.yaml#/definitions/uint32
     description: >
@@ -36,6 +39,11 @@ properties:
 required:
   - qcom,client-id
 
+oneOf:
+  - $ref: reserved-memory.yaml
+  - required:
+      - qcom,alloc-size
+
 unevaluatedProperties: false
 
 examples:
@@ -53,3 +61,12 @@ examples:
             qcom,client-id = <1>;
         };
     };
+  - |
+    rmtfs {
+        compatible = "qcom,rmtfs-mem";
+
+        qcom,alloc-size = <(2*1024*1024)>;
+        qcom,client-id = <1>;
+        qcom,vmid = <15>;
+    };
+...
-- 
2.25.1