Signed-off-by: Sameer Pujar <spujar@xxxxxxxxxx>
Cc: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/graph.txt | 128 --------------------
The removed Documentation/devicetree/bindings/graph.txt is referenced by
a lot of files, tree-wide. Should the references be updated in the same
series?
May be possible to include in the same series if it is just about using
'graph.yaml' reference instead of 'graph.txt' in various files.
...
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/graph.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common bindings for device graphs
+
+description: |
+ The hierarchical organisation of the device tree is well suited to describe
+ control flow to devices, but there can be more complex connections between
+ devices that work together to form a logical compound device, following an
+ arbitrarily complex graph.
+ There already is a simple directed graph between devices tree nodes using
+ phandle properties pointing to other nodes to describe connections that
+ can not be inferred from device tree parent-child relationships. The device
+ tree graph bindings described herein abstract more complex devices that can
+ have multiple specifiable ports, each of which can be linked to one or more
+ ports of other devices.
+
+ These common bindings do not contain any information about the direction or
+ type of the connections, they just map their existence. Specific properties
+ may be described by specialized bindings depending on the type of connection.
+
+ To see how this binding applies to video pipelines, for example, see
+ Documentation/devicetree/bindings/media/video-interfaces.txt.
+ Here the ports describe data interfaces, and the links between them are
+ the connecting data buses. A single port with multiple connections can
+ correspond to multiple devices being connected to the same physical bus.
+
+maintainers:
+ - Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
+
+definitions:
+
+ port:
+ type: object
+ description: |
+ If there is more than one 'port' or more than one 'endpoint' node
+ or 'reg' property present in the port and/or endpoint nodes then
+ '#address-cells' and '#size-cells' properties are required in relevant
+ parent node.
reg property.
What about #address-cells and #size-cells in port and ports nodes?
These must either be #address-cells = <1>, #size-cells = <0>, or they
can be absent if the parent node already has the same, or if a port node
only contains a single endpoint.
Yes, will list these properties for port/ports.
...
