Heavy spi module refactor #32
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"master" semantics are just for compatibility at this point
rely more on devm_ allocations & don't worry about freeing them
We can deduce it
The cs handling is done via the kernel, although I'de like to find out how to control them all individually.
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Okay yeah I got clued in about multiple devices and spi does fail to load on the second device plugged in. |
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Takes advantage of existing kernel procedures for gpio handling mostly, some resource management and device loading too.
Oh, this actually doesn't work because:
devm_spi_register_masterdoes automatically allocation CS pins, but looks them up in a table with a device it literally just named (??)Also regresses the spi driver behaviour by claiming all CS pins / spi busses immediately. It would be cool to be able to load/unload individual busses individually (like we've previously been able to do), if there's some convention on how to do that within the kernel that would be a good start. This probably also means not relying on the kernel's csgpiod handling as much.