This patch adds the DT binding documentation for the shared memory
between Face Detection unit of the camera system and the co-processor
in Mediatek SoCs.
Signed-off-by: Jerry-ch Chen <jerry-ch.chen@xxxxxxxxxxxx>
---
.../devicetree/bindings/media/mediatek,fd_smem.txt | 28 ++++++++++++++++++++++
1 file changed, 28 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/mediatek,fd_smem.txt
diff --git a/Documentation/devicetree/bindings/media/mediatek,fd_smem.txt b/Documentation/devicetree/bindings/media/mediatek,fd_smem.txt
new file mode 100644
index 0000000..6f7c836
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/mediatek,fd_smem.txt
@@ -0,0 +1,28 @@
+Mediatek FD Shared Memory Device
+
+Mediatek FD Shared Memory Device is used to manage shared memory
+among CPU, FD and coprocessor. It is associated with a reserved
+memory region (Please see Documentation/devicetree/bindings/
+reserved-memory/mediatek,reserve-memory-fd_smem.txt) and
+provide the context to allocate memory with dma addresses.
+
+Required properties:
+- compatible: Shall be "mediatek,fd_smem"
+
+- iommus: Shall point to the respective IOMMU block with master port
+ as argument. Please set the ports which may be accessed
+ through the common path. You can see
+ Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
+ for the detail.
+
+- mediatek,larb: must contain the local arbiters in the current SoCs.
+ Please set the larb of imgsys for FD if you are using FD function.
+ You can see Documentation/devicetree/bindings/memory-controllers/
+ mediatek,smi-larb.txt for the detail.
+
+Example:
+ fd_smem: fd_smem {
+ compatible = "mediatek,fd_smem";
+ mediatek,larb = <&larb5>;
+ iommus = <&iommu M4U_PORT_CAM_IMGI>;
+ };
--
1.9.1
