DT bindings doc for amlogic,meson-canvas
Signed-off-by: Maxime Jourdan <maxi.jour...@wanadoo.fr>
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.../soc/amlogic/amlogic,meson-canvas.txt | 36 +++++++++++++++++++
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Documentation/devicetree/bindings/soc/amlogic/amlogic,meson-canvas.txt
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a/Documentation/devicetree/bindings/soc/amlogic/amlogic,meson-canvas.txt
b/Documentation/devicetree/bindings/soc/amlogic/amlogic,meson-canvas.txt
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+Amlogic Meson Canvas
+================================
+
+A canvas is a collection of metadata that describes a pixel buffer.
+Those metadata include: width, height, phyaddr, wrapping, block mode
+and endianness.
+
+Many IPs within Amlogic SoCs rely on canvas indexes to read/write pixel data
+rather than use the phy addresses directly. For instance, this is the case for
+the video decoders and the display.
+
+Amlogic SoCs have 256 canvas.
+
+Device Tree Bindings:
+---------------------
+
+Canvas Provider
+--------------------------
+
+Required properties:
+- compatible: "amlogic,meson-canvas"
+
+Parent node should have the following properties :
+- compatible: "amlogic,meson-gx-dmc-sysctrl", "syscon", "simple-mfd"
+- reg: base address and size of the DMC system control register space.
+
+Example:
+
+sysctrl_DMC: system-controller@0 {
+ compatible = "amlogic,meson-gx-dmc-sysctrl", "syscon", "simple-mfd";
+ reg = <0x0 0x0 0x0 0x1000>;
+
+ canvas: canvas-provider@0 {
+ compatible = "amlogic,meson-canvas";
+ };
+};
--
2.17.1
