Commit e49363e9 authored by Sakari Ailus's avatar Sakari Ailus Committed by Rafael J. Wysocki
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ACPI: property: graph: Improve graph documentation for port/ep numbering 



Document that if a port has a single endpoint only, its value shall be
zero. Similarly, if a device object only has a single port, its value
shlla be zero.

Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent e58b1c6a

Documentation/acpi/dsd/graph.txt

+4 −1
Original line number Original line Diff line number Diff line
@@ -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

Each port node contains a property extension key "port", the value of

which is the number of the port. Each endpoint is similarly numbered

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

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

The endpoint reference uses property extension with "remote-endpoint" property

name followed by a reference in the same package. Such references consist of the

name followed by a reference in the same package. Such references consist of the