On 27.04.2023 22:45:40, Dario Binacchi wrote:
> Add support for bxcan (Basic eXtended CAN controller) to STM32F746. The
> chip contains three CAN peripherals, CAN1 and CAN2 in dual peripheral
> configuration and CAN3 in single peripheral configuration:
> - Dual CAN peripheral configuration:
> * CAN1: Primary bxCAN for managing the communication between a secondary
> bxCAN and the 512-byte SRAM memory.
> * CAN2: Secondary bxCAN with no direct access to the SRAM memory.
> This means that the two bxCAN cells share the 512-byte SRAM memory and
> CAN2 can't be used without enabling CAN1.
> - Single CAN peripheral configuration:
> * CAN3: Primary bxCAN with dedicated Memory Access Controller unit and
> 512-byte SRAM memory.
>
> -------------------------------------------------------------------------
> | features | CAN1 | CAN2 | CAN 3 |
> -------------------------------------------------------------------------
> | SRAM | 512-byte shared between CAN1 & CAN2 | 512-byte |
> -------------------------------------------------------------------------
> | Filters | 26 filters shared between CAN1 & CAN2 | 14 filters |
> -------------------------------------------------------------------------
>
> Signed-off-by: Dario Binacchi <dario.binacchi@xxxxxxxxxxxxxxxxxxxx>
I initially upstreamed this patch as 0920ccdf41e3 ("ARM: dts: stm32: add
CAN support on stm32f746"), but it depends on "dt-bindings: mfd:
stm32f7: add binding definition for CAN3" [1], which is missing in
net/main, resulting in parsing errors in the "stm32f746.dtsi".
This patch is reverted by [2], so please upstream it via the platform
maintainers.
regards,
Marc
[1] https://lore.kernel.org/all/20230423172528.1398158-2-dario.binacchi@xxxxxxxxxxxxxxxxxxxx
[2] https://lore.kernel.org/all/20230517181950.1106697-1-mkl@xxxxxxxxxxxxxx
--
Pengutronix e.K. | Marc Kleine-Budde |
Embedded Linux | https://www.pengutronix.de |
Vertretung Nürnberg | Phone: +49-5121-206917-129 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-9 |
Attachment:
signature.asc
Description: PGP signature
