Thread (19 messages) 19 messages, 3 authors, 2025-08-14
STALE343d REVIEWED: 7 (7M)

[PATCH v2 02/13] dt-bindings: display: st,stm32-ltdc: add access-controllers property

From: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
Date: 2025-08-12 13:51:18
Also in: dri-devel, linux-devicetree, lkml
Subsystem: drm drivers, drm drivers and misc gpu patches, drm drivers for stm, open firmware and flattened device tree bindings, the rest · Maintainers: David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Yannick Fertre, Raphael Gallais-Pou, Philippe Cornu, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds

access-controllers is an optional property that allows a peripheral to
refer to one or more domain access controller(s).

This property is added when the peripheral is under the STM32 firewall
controller.  It allows an accurate representation of the hardware, where
the peripheral is connected to a firewall bus.  The firewall can then check
the peripheral accesses before allowing its device to probe.

Acked-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
---
 Documentation/devicetree/bindings/display/st,stm32-ltdc.yaml | 3 +++
 1 file changed, 3 insertions(+)
diff --git a/Documentation/devicetree/bindings/display/st,stm32-ltdc.yaml b/Documentation/devicetree/bindings/display/st,stm32-ltdc.yaml
index 33e814f8b85679a09df697246d2f8ccdbfc44223..0ff47ac48ec655c1d126e16922ef37e9c739dbea 100644
--- a/Documentation/devicetree/bindings/display/st,stm32-ltdc.yaml
+++ b/Documentation/devicetree/bindings/display/st,stm32-ltdc.yaml
@@ -40,6 +40,9 @@ properties:
   resets:
     maxItems: 1
 
+  access-controllers:
+    maxItems: 1
+
   port:
     $ref: /schemas/graph.yaml#/properties/port
     description: |
-- 
2.25.1

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