On Sun, Oct 25, 2020 at 8:59 PM Drew Fustini <drew@xxxxxxxxxxxxxxx> wrote: > > On Sun, Oct 25, 2020 at 1:42 PM Patrick Menschel <menschel.p@xxxxxxxxx> wrote: > > > > > The > > > https://github.com/marckleinebudde/linux/commits/v5.4-rpi/mcp251xfd-20201022-54 > > > branch already contains overlays: > > > > > > https://github.com/marckleinebudde/linux/commit/9e02abd4fe591b2d7f369cdaaaf8f1269b7c8693 > > > > > > Marc > > > > > > > OK, I should have known better ;-) > > > > -- > > Patrick > > Are there any additional parameters that you are specifying for > "dtoverlay" in config.txt, such as spimaxfrequency? > > Thanks, > Drew I'm seeing this message which makes me think my issue is that I am not setting the oscillator as a dtoverlay param. [ 6.873081] CAN device driver interface [ 6.879904] DEBUG mcp251xfd mcp251xfd_probe(): ENTER [ 6.880068] spi_master spi0: will run message pump with realtime priority [ 6.921312] mcp251xfd spi0.0 (unnamed net_device) (uninitialized): Failed to detect MCP251xFD (osc=0x00000000). >From /boot/config.txt [pi4] dtoverlay=mcp251xfd-spi0-0 Could you please share what your experience has been like? thanks, drew