On 06/29/2017 05:41 PM, Andrew Lunn wrote: >> Transceivers for CAN are not apart of any model. Traditional CAN didn't >> have a problem because all transceivers from my understanding supported >> the maximum speed of 1 Mbps defined by the spec. However, with the >> introduction of CAN Flexible Datarate mode it seems that for >> transceivers that supported CAN-FD the maximum supported speeds vary. > > So transceivers are dumb devices, nothing to configure, so no need to > have a driver for them.
Yes and no. CAN transceivers are usually quite dumb, but most of them have some sort of "enable" pin. This pin is currently modelled as a regulator. Which fits nicely, as there dual transceivers with only one enable pin. However there are more complicated transceivers with two pins, that implement a state machine, where you can query the chip for various error conditions and can configure remote wakeup, etc... So in the future a proper driver might be implemented. Marc -- Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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