linux-kernel - [PATCH v10 01/15] dt-bindings: firmware: qcom,scm: add memory-region for sa8775p

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Message-Id: <20240527-shm-bridge-v10-1-ce7afaa58d3a@linaro.org>
Date: Mon, 27 May 2024 14:54:51 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Robert Marko <robimarko@...il.com>, 
 Das Srinagesh <quic_gurus@...cinc.com>, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>, 
 Maximilian Luz <luzmaximilian@...il.com>, 
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
 Srini Kandagatla <srinivas.kandagatla@...aro.org>, 
 Arnd Bergmann <arnd@...db.de>, Elliot Berman <quic_eberman@...cinc.com>, 
 Alex Elder <elder@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 kernel@...cinc.com
Subject: [PATCH v10 01/15] dt-bindings: firmware: qcom,scm: add
 memory-region for sa8775p

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

Document a new property (currently only for sa8775p) that describes the
memory region reserved for communicating with the TrustZone.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 Documentation/devicetree/bindings/firmware/qcom,scm.yaml | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
index 47d3d2d52acd..2cc83771d8e7 100644
--- a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
+++ b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
@@ -93,6 +93,11 @@ properties:
       protocol to handle sleeping SCM calls.
     maxItems: 1
 
+  memory-region:
+    description:
+      Phandle to the memory region reserved for the shared memory bridge to TZ.
+    maxItems: 1
+
   qcom,sdi-enabled:
     description:
       Indicates that the SDI (Secure Debug Image) has been enabled by TZ
@@ -193,6 +198,16 @@ allOf:
     then:
       properties:
         interrupts: false
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - qcom,scm-sa8775p
+    then:
+      properties:
+        memory-region: false
 
 required:
   - compatible

-- 
2.43.0