On 10/31/20 10:57 PM, Drew Fustini wrote:
> #dtoverlay=2xMCP2517FD
> pi@raspberrypi:~$ dmesg | grep -Ei can\|spi
> [    5.916785] DEBUG spi.c spi_setup(): ENTER
> [    5.917056] DEBUG spi.c spi_setup(): ENTER
> [    5.960326] DEBUG spi.c spi_setup(): ENTER
> [    6.897919] CAN device driver interface
> [    6.904530] mcp251xfd spi0.0: DEBUG mcp251xfd mcp251xfd_probe():
> devm_clk_get()
> [    6.904574] mcp251xfd spi0.0: DEBUG mcp251xfd mcp251xfd_probe(): feq=40000000
> [    6.904641] DEBUG spi.c spi_setup(): ENTER
> [    6.904658] spi_master spi0: will run message pump with realtime priority
> [    6.912009] mcp251xfd spi0.0 can0: MCP2517FD 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:0.00MHz) successfully initialized.

> [    6.912613] mcp251xfd spi1.0: DEBUG mcp251xfd mcp251xfd_probe():
> devm_clk_get()
> [    6.912646] mcp251xfd spi1.0: DEBUG mcp251xfd mcp251xfd_probe(): feq=40000000
> [    6.912701] DEBUG spi.c spi_setup(): ENTER
> [    6.912719] spi_master spi1: will run message pump with realtime priority
> [    6.920067] mcp251xfd spi1.0 can1: MCP2517FD 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:0.00MHz) successfully initialized.

spi1.0?

Have you changed any of the solder jumpers on JPAD3? See the 0 ohm resistors at A/B:

    https://www.waveshare.com/w/upload/1/13/2-CH_CAN_FD_HAT_Manual-3.png

I cannot see, how any of the chip selects of SPI1 is routed to the mcp2517fd....

Marc

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