Re: [RFC PATCH 04/13] can: slcan: use CAN network device driver API
From: Marc Kleine-Budde
Date: Tue Jun 07 2022 - 07:14:06 EST
On 07.06.2022 11:47:43, Dario Binacchi wrote:
> As suggested by commit [1], now the driver uses the functions and the
> data structures provided by the CAN network device driver interface.
>
> There is no way to set bitrate for SLCAN based devices via ip tool, so
^^^^^^^^^^^^^^^
Currently the driver doesn't implement a way
> you'll have to do this by slcand/slcan_attach invocation through the
> -sX parameter:
>
> - slcan_attach -f -s6 -o /dev/ttyACM0
> - slcand -f -s8 -o /dev/ttyUSB0
>
> where -s6 in will set adapter's bitrate to 500 Kbit/s and -s8 to
> 1Mbit/s.
> See the table below for further CAN bitrates:
> - s0 -> 10 Kbit/s
> - s1 -> 20 Kbit/s
> - s2 -> 50 Kbit/s
> - s3 -> 100 Kbit/s
> - s4 -> 125 Kbit/s
> - s5 -> 250 Kbit/s
> - s6 -> 500 Kbit/s
> - s7 -> 800 Kbit/s
> - s8 -> 1000 Kbit/s
>
> In doing so, the struct can_priv::bittiming.bitrate of the driver is not
> set and since the open_candev() checks that the bitrate has been set, it
> must be a non-zero value, the bitrate is set to a fake value (-1) before
> it is called.
What does
| ip --details -s -s link show
show as the bit rate?
Marc
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