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Documentation: ACPI: Direct references are allowed to devices only 

In ACPI it is possible to make references to device objects only,
not to other objects inside a device.

In practice this means that hierarchical data extension targets
must be in parentheses to make them strings, or an ACPICA warning
will be produced.

Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Sakari Ailus 2019-05-10 12:46:03 +03:00 committed by Rafael J. Wysocki
parent 5695f51d05
commit a423bd845c
2 changed files with 9 additions and 9 deletions
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6
Documentation/firmware-guide/acpi/dsd/data-node-references.rst
View File

@ -45,8 +45,8 @@ the ANOD object which is also the final target node of the reference.
Name (_DSD, Package () {
ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
Package () {
Package () { "node@0", NOD0 },
Package () { "node@1", NOD1 },
Package () { "node@0", "NOD0" },
Package () { "node@1", "NOD1" },
}
})
Name (NOD0, Package() {
@ -58,7 +58,7 @@ the ANOD object which is also the final target node of the reference.
Name (NOD1, Package() {
ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
Package () {
Package () { "anothernode", ANOD },
Package () { "anothernode", "ANOD" },
}
})
Name (ANOD, Package() {

12
Documentation/firmware-guide/acpi/dsd/graph.rst
View File

@ -45,7 +45,7 @@ with "port" and must be followed by the "@" character and the number of the
port as its key. The target object it refers to should be called "PRTX", where
"X" is the number of the port. An example of such a package would be::
Package() { "port@4", PRT4 }
Package() { "port@4", "PRT4" }
Further on, endpoints are located under the port nodes. The hierarchical
data extension key of the endpoint nodes must begin with
@ -54,7 +54,7 @@ endpoint. The object it refers to should be called "EPXY", where "X" is the
number of the port and "Y" is the number of the endpoint. An example of such a
package would be::
Package() { "endpoint@0", EP40 }
Package() { "endpoint@0", "EP40" }
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
@ -91,7 +91,7 @@ A simple example of this is show below::
},
ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
Package () {
Package () { "port@0", PRT0 },
Package () { "port@0", "PRT0" },
}
})
Name (PRT0, Package() {
@ -101,7 +101,7 @@ A simple example of this is show below::
},
ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
Package () {
Package () { "endpoint@0", EP00 },
Package () { "endpoint@0", "EP00" },
}
})
Name (EP00, Package() {
@ -121,7 +121,7 @@ A simple example of this is show below::
Name (_DSD, Package () {
ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
Package () {
Package () { "port@4", PRT4 },
Package () { "port@4", "PRT4" },
}
})
@ -132,7 +132,7 @@ A simple example of this is show below::
},
ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
Package () {
Package () { "endpoint@0", EP40 },
Package () { "endpoint@0", "EP40" },
}
})