The global *di alias was used to keep track of the driver context.
It caused issues with trying to use several subdrivers at once, so
its use was obsoleted.
The correct context is preserved through different mechanisms, either
the *sdi pointer, or wrappers which pass the correct context.
The *di alias is no longer used, so remove it.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Wrappers for hw_init, hw_cleanup, clear_instances, and hw_scan are needed for
each subdriver due to the nature of serial-dmm. These wrappers are implemented
as macros, in order to reduce the number of lines of code.
For each of those functions, we have a separate wrapper list, then we connect
them together in a first-class driver using a DRV macro, and yet another list
(the DRV list).
Instead of declaring those wrappers in separate lists, include them in the DRV
macro. This approach reduces the number of macro lists from five to just one.
From the perspective of adding a new subdriver, this also greatly reduces the
number of places needed to hook in a new device.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Store/use the receive_data() function and a pointer to the driver struct
in the dmms[] array. Use a ".subdriver" entry in the driver struct.
Use a macro to simplify hw_init() wrappers.
di was initialized as NULL. If no device covered by this driver
is used, di remains NULL. This causes a segmentation fault when
calling clear_instances().
Check for di being NULL.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Use the infrastructure of serial-dmm to handle the RadioShack 22-812,
and completely remove radioshack-dmm.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Alexandru Gagniuc
Uwe Hermann
Peter Stuge