Hi Biju,
On Mon, 10 Mar 2025 at 10:28, Biju Das biju.das.jz@bp.renesas.com wrote:
From: Geert Uytterhoeven geert@linux-m68k.org
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