On 12/22/2017 02:31 PM, Faiz Abbas wrote:

From: Franklin S Cooper Jr <redacted>

Various CAN or CAN-FD IP may be able to run at a faster rate than
what the transceiver the CAN node is connected to. This can lead to
unexpected errors. However, CAN transceivers typically have fixed
limitations and provide no means to discover these limitations at
runtime. Therefore, add support for a can-transceiver node that
can be reused by other CAN peripheral drivers to determine for both
CAN and CAN-FD what the max bitrate that can be used. If the user
tries to configure CAN to pass these maximum bitrates it will throw
an error.

Please add support to read the maximum bitrate via netlink. Have a look
at 12a6075cabc0 ("can: dev: add CAN interface termination API"). I think
you need to extend the following functions: can_get_size() and
can_fill_info().

Marc

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