diff options
| -rw-r--r-- | Documentation/acpi/dsd/graph.txt | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/acpi/dsd/graph.txt b/Documentation/acpi/dsd/graph.txt index 0b007fceda0e..3131f457882b 100644 --- a/Documentation/acpi/dsd/graph.txt +++ b/Documentation/acpi/dsd/graph.txt @@ -55,7 +55,10 @@ endpoint. An example of such a package would be: Each port node contains a property extension key "port", the value of which is the number of the port. Each endpoint is similarly numbered with a property extension key "endpoint". Port numbers must be unique within a -device and endpoint numbers must be unique within a port. +device and endpoint numbers must be unique within a port. If a device object +may only has a single port, then the number of that port shall be zero. +Similarly, if a port may only have a single endpoint, the number of that +endpoint shall be zero. The endpoint reference uses property extension with "remote-endpoint" property name followed by a reference in the same package. Such references consist of the |