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Message-ID: <20230517-doing-humorous-ee72fbcf740c-mkl@pengutronix.de>
Date: Wed, 17 May 2023 20:29:29 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Dario Binacchi <dario.binacchi@...rulasolutions.com>
Cc: linux-kernel@...r.kernel.org, michael@...rulasolutions.com,
Amarula patchwork <linux-amarula@...rulasolutions.com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH v2 5/5] ARM: dts: stm32: add CAN support on stm32f746
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@...rulasolutions.com>
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@amarulasolutions.com
[2] https://lore.kernel.org/all/20230517181950.1106697-1-mkl@pengutronix.de
--
Pengutronix e.K. | Marc Kleine-Budde |
Embedded Linux | https://www.pengutronix.de |
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