Hi all,
This patch series adds support for the CAN-FD interface on the Renesas
R-Car V4H (R8A779G0) SoC and support for CAN transceivers described as
PHYs to the R-Car CAN-FD driver. It includes several fixes for issues
(some minor) detected while adding the support and during testing.
More details can be found in the individual patches.
Note that the last patch depends on "[PATCH 1/7] phy: Add
devm_of_phy_optional_get() helper"[1].
This has been tested on the Renesas White-Hawk development board using
cansend, candump, and canfdtest:
- Channel 0 uses an NXP TJR1443AT CAN transceiver, and works fine,
- Channels 1-7 use Microchip MCP2558FD-H/SN CAN transceivers (not
mounted for channels 4-7), which do not need explicit description.
While channel 1 works fine, channels 2-3 do not seem to work.
Hence despite the new fixes, the test results are similar to what Ulrich
Hecht reported for R-Car V3U on the Falcon development board before,
i.e. only channels 0 and 1 work (FTR, [2] does not help).
Whether this is a CAN-FD driver issue, a pin control issue, an IP core
issue, or an SoC integration issue is still to be seen...
Thanks for your comments!
[1] https://lore.kernel.org/all/f53a1bcca637ceeafb04ce3540a605532d3bc34a.1674036164.git.geert+renesas@xxxxxxxxx
[2] commit e3e5bccc92446048 ("can: rcar_canfd:
rcar_canfd_configure_afl_rules(): Fix Rx FIFO entry setting") in
renesas-bsp/v5.10.147/rcar-5.2.0.rc3.
Geert Uytterhoeven (12):
dt-bindings: can: renesas,rcar-canfd: R-Car V3U is R-Car Gen4
dt-bindings: can: renesas,rcar-canfd: Document R-Car V4H support
dt-bindings: can: renesas,rcar-canfd: Add transceiver support
can: rcar_canfd: Fix R-Car V3U CAN mode selection
can: rcar_canfd: Fix R-Car V3U GAFLCFG field accesses
can: rcar_canfd: Abstract out DCFG address differences
can: rcar_canfd: Add support for R-Car Gen4
can: rcar_canfd: Fix R-Car Gen4 DCFG.DSJW field width
can: rcar_canfd: Fix R-Car Gen4 CFCC.CFTML field width
can: rcar_canfd: Sort included header files
can: rcar_canfd: Add helper variable dev
can: rcar_canfd: Add transceiver support
.../bindings/net/can/renesas,rcar-canfd.yaml | 16 +-
drivers/net/can/rcar/rcar_canfd.c | 255 ++++++++++--------
2 files changed, 148 insertions(+), 123 deletions(-)
--
2.34.1
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
