Re: [PATCH v2 5/5] ARM: dts: stm32: add CAN support on stm32f746

[Marc Kleine-Budde]

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

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