Document the device tree bindings for the MIPI DSI bus. The MIPI Display Serial Interface specifies a serial bus and a protocol for communication between a host and up to four peripherals.
Signed-off-by: Thierry Reding treding@nvidia.com --- .../devicetree/bindings/mipi/dsi/mipi-dsi-bus.txt | 54 ++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 Documentation/devicetree/bindings/mipi/dsi/mipi-dsi-bus.txt
diff --git a/Documentation/devicetree/bindings/mipi/dsi/mipi-dsi-bus.txt b/Documentation/devicetree/bindings/mipi/dsi/mipi-dsi-bus.txt new file mode 100644 index 000000000000..f58ca4485a2f --- /dev/null +++ b/Documentation/devicetree/bindings/mipi/dsi/mipi-dsi-bus.txt @@ -0,0 +1,54 @@ +MIPI DSI (Display Serial Interface) busses +========================================== + +The MIPI Display Serial Interface specifies a serial bus and a protocol for +communication between a host and up to four peripherals. This document will +define the syntax used to represent a DSI bus in a device tree. + +This document describes DSI bus-specific properties only or defines existing +standard properties in the context of the DSI bus. + +Each DSI host provides a DSI bus. The DSI host controller's node contains a +set of properties that characterize the bus. Child nodes describe individual +peripherals on that bus. + +DSI host +-------- + +In addition to the standard properties and those defined by the parent bus of +a DSI host, the following properties apply to a node representing a DSI host. + +Required properties: +- #address-cells: The number of cells required to represent an address on the + bus. DSI peripherals are addressed using a 2-bit virtual channel number, so + a maximum of 4 devices can be addressed on a single bus. Hence the value of + this property should be 1. +- #size-cells: Should be 0. + +DSI peripheral +-------------- + +Peripherals are represented as child nodes of the DSI host's node. Properties +described here apply to all DSI peripherals, but individual bindings may want +to define additional, device-specific properties. + +Required properties: +- reg: The virtual channel number of a DSI peripheral. Must be in the range + from 0 to 3. + +Example +------- + + dsi-host { + ... + + #address-cells = <1>; + #size-cells = <0>; + + peripheral@0 { + compatible = "..."; + reg = <0>; + }; + + ... + };