Hello, afaik Drew got that board working. https://marc.info/?l=linux-can&m=160427096004578&w=2 Same time we did PRs for board specific overlays, not waveshare but seeed while waveshare is very similar to seeed v1 https://github.com/raspberrypi/linux/pull/4034 https://github.com/raspberrypi/linux/pull/4041 With some reverse engineering we get back to a hopefully working set of lines. Please try these lines in config.txt dtoverlay=mcp251xfd,spi0-0,interrupt=25 dtoverlay=mcp251xfd,spi1-0,interrupt=16 There is also a popular way to get rid of the can0 / can1 swapping, use udev rules. Try pasting this into /etc/udev/rules.d/70-can.rules SUBSYSTEM=="net", ACTION=="add", DEVPATH=="/devices/platform/soc/*/*/*/spi0.0/net/can?", NAME="mcp0" SUBSYSTEM=="net", ACTION=="add", DEVPATH=="/devices/platform/soc/*/*/*/spi0.1/net/can?", NAME="mcp1" and correspondingly this into /etc/network/interfaces.d/70-can but you may want to change bitrates auto mcp0 iface mcp0 inet manual pre-up /sbin/ip link set $IFACE type can bitrate 1000000 sample-point 0.75 dbitrate 8000000 dsample-point 0.8 fd on up /sbin/ifconfig $IFACE up down /sbin/ifconfig $IFACE down auto mcp1 iface mcp1 inet manual pre-up /sbin/ip link set $IFACE type can bitrate 1000000 sample-point 0.75 dbitrate 8000000 dsample-point 0.8 fd on up /sbin/ifconfig $IFACE up down /sbin/ifconfig $IFACE down It may be wise to open another PR for that board. Best Regards, Patrick Am 23.12.21 um 18:05 schrieb Dr. Michael Lauer: > Please forgive me, if this is not the proper list for this message, > but as far as I know the developer of the mcp251xfd driver is also reading here. > > I recently acquired a Dual CAN FD HAT (https://www.waveshare.com/wiki/2-CH_CAN_FD_HAT) > to run on my Raspberry PI 4. Currently, this is using kernel 5.15.11, but for some > reason, only one of the two ports are recognized. Instead of detecting the 2nd port, > it seems to just _renames_ the port. Here is the relevant kernel log: > > [ 5.495409] CAN device driver interface > [ 5.552660] spi_master spi1: will run message pump with realtime priority > [ 5.559885] mcp251xfd spi1.0 (unnamed net_device) (uninitialized): Detected MCP2518FD, but firmware specifies a MCP2517FD. Fixing up. > [ 5.580908] vc4-drm gpu: bound fe400000.hvs (ops vc4_hvs_ops [vc4]) > [ 5.585428] Registered IR keymap rc-cec > [ 5.599117] rc rc0: vc4 as /devices/platform/soc/fef00700.hdmi/rc/rc0 > [ 5.601698] mcp251xfd spi1.0 can0: MCP2518FD rev0.0 (-RX_INT -MAB_NO_WARN +CRC_REG +CRC_RX +CRC_TX +ECC -HD c:40.00MHz m:20.00MHz r:17.00MHz e:16.66MHz) successfully initialized. > [ 5.633622] input: vc4 as /devices/platform/soc/fef00700.hdmi/rc/rc0/input3 > [ 5.677448] vc4-drm gpu: bound fef00700.hdmi (ops vc4_hdmi_ops [vc4]) > [ 5.697059] Registered IR keymap rc-cec > [ 5.698682] mcp251xfd spi1.0 can1: renamed from can0 > > The activated overlays in config.txt are > > dtoverlay=2xMCP2517FD > dtoverlay=2xMCP2518FD-spi0 > > Perhaps anyone of you has a similar config and can tell me what could be wrong? > > Best, > > Mickey. >
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