diff options
| author | Pierre-Louis Bossart <[email protected]> | 2022-08-23 12:50:03 +0800 |
|---|---|---|
| committer | Vinod Koul <[email protected]> | 2022-08-30 10:16:41 +0530 |
| commit | c60561014257699d81ab392eb6cb6389ad8907df (patch) | |
| tree | 477c21fb7f9ce71f7a81d7020aea5a6b50cd3501 /include/linux/mutex_api.h | |
| parent | 88de0a8f48bc2339e8c279315320e6f406ff5f96 (diff) | |
soundwire: bus: allow device number to be unique at system level
The SoundWire specification allows the device number to be allocated
at will. When a system includes multiple SoundWire links, the device
number scope is limited to the link to which the device is attached.
However, for integration/debug it can be convenient to have a unique
device number across the system. This patch adds a 'dev_num_ida_min'
field at the bus level, which when set will be used to allocate an
IDA.
The allocation happens when a hardware device reports as ATTACHED. If
any error happens during the enumeration, the allocated IDA is not
freed - the device number will be reused if/when the device re-joins
the bus. The IDA is only freed when the Linux device is unregistered.
Signed-off-by: Pierre-Louis Bossart <[email protected]>
Reviewed-by: Ranjani Sridharan <[email protected]>
Reviewed-by: Rander Wang <[email protected]>
Signed-off-by: Bard Liao <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>
Diffstat (limited to 'include/linux/mutex_api.h')
0 files changed, 0 insertions, 0 deletions