Hi Biju,
On Mon, 10 Mar 2025 at 10:28, Biju Das <biju.das.jz@xxxxxxxxxxxxxx> wrote:
> > From: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
> > > > Unfortunately, it does not fix CAN2 and CAN3 on the Gray Hawk Single
> > > > development board, which is based on R-Car V4M with 4 CAN channels.
> > > Q2) Does it by chance is in standby mode?
> >
> > You mean the transceiver?
>
> Yes, for some boards. we need to toggle GPIO to move it from stand by to normal mode, so that it
> can start communication.
CAN0 on White/Gray Hawk variants uses TJR1443AT transceivers,
which do have enable-gpios (and do work).
The other channels use MCP2558FD transceivers, and their
standby pin is always deasserted (except during system reset).
> > All channels but channel zero use the same type of transceiver, and similar wiring. There might still
> > be a pin control bug, though.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
