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| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2022-08-23 06:50:03 +0200 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2022-08-30 06:46:41 +0200 |
| commit | c60561014257699d81ab392eb6cb6389ad8907df (patch) | |
| tree | 477c21fb7f9ce71f7a81d7020aea5a6b50cd3501 /.gitattributes | |
| parent | soundwire: bus: rename sdw_ida as sdw_bus_ida (diff) | |
| download | linux-c60561014257699d81ab392eb6cb6389ad8907df.tar.xz linux-c60561014257699d81ab392eb6cb6389ad8907df.zip | |
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 <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220823045004.2670658-3-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to '.gitattributes')
0 files changed, 0 insertions, 0 deletions