mcp23018: add return status to init #18178
Merged
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include a "is the device actually connected?" check into the init
function, that now returns a boolean, which can be handled by a
keyboard to - for example - decide not to query an unconnected
portexpander during each matrix scan; avoiding i2c
spam/errors/timeouts
Signed-off-by: Johannes Schneider [email protected]
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