Device Tree namespace link device ID
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-The Device Tree protocol uses device indentification based on the "compatible"
+The Device Tree protocol uses device identification based on the "compatible"
property whose value is a string or an array of strings recognized as device
identifiers by drivers and the driver core. The set of all those strings may be
-regarded as a device indentification namespace analogous to the ACPI/PNP device
+regarded as a device identification namespace analogous to the ACPI/PNP device
ID namespace. Consequently, in principle it should not be necessary to allocate
a new (and arguably redundant) ACPI/PNP device ID for a devices with an existing
identification string in the Device Tree (DT) namespace, especially if that ID
list the IDs of devices the given one is compatible with, but those IDs must
belong to one of the namespaces prescribed by the ACPI specification (see
Section 6.1.2 of ACPI 6.0 for details) and the DT namespace is not one of them.
-Moreover, the specification mandates that either a _HID or an _ADR identificaion
+Moreover, the specification mandates that either a _HID or an _ADR identification
object be present for all ACPI objects representing devices (Section 6.1 of ACPI
6.0). For non-enumerable bus types that object must be _HID and its value must
be a device ID from one of the namespaces prescribed by the specification too.
Linux patches. The patches generated by this process are referred to as
"linuxized ACPICA patches". The release process is carried out on a local
copy the ACPICA git repository. Each commit in the monthly release is
- converted into a linuxized ACPICA patch. Together, they form the montly
+ converted into a linuxized ACPICA patch. Together, they form the monthly
ACPICA release patchset for the Linux ACPI community. This process is
illustrated in the following figure:
release utilities (please refer to Section 4 below for the details).
3. Linux specific features - Sometimes it's impossible to use the
current ACPICA APIs to implement features required by the Linux kernel,
- so Linux developers occasionaly have to change ACPICA code directly.
+ so Linux developers occasionally have to change ACPICA code directly.
Those changes may not be acceptable by ACPICA upstream and in such cases
they are left as committed ACPICA divergences unless the ACPICA side can
implement new mechanisms as replacements for them.
4. ACPICA release fixups - ACPICA only tests commits using a set of the
- user space simulation utilies, thus the linuxized ACPICA patches may
+ user space simulation utilities, thus the linuxized ACPICA patches may
break the Linux kernel, leaving us build/boot failures. In order to
avoid breaking Linux bisection, fixes are applied directly to the
linuxized ACPICA patches during the release process. When the release