DTS property attributes are (by default) not required.
Explicitly specifying `required: false` is redundant.
Perhaps a warning to that effect would be useful.
Signed-off-by: Chris Friedt <cfriedt@meta.com>
Add generic devicetree bindings for simple CAN transceivers.
Always-on CAN transceivers are considered passive and just provide a
maximum supported bitrate.
Active CAN controllers can typically be controlled by the MCU via either
SPI, I2C, or GPIO. Common GPIO controlled CAN transceivers provide
either a stand-by or an enable pin (or both) for controlling the state
of the CAN transceiver.
Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
