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[79.31.31.9]) by smtp.gmail.com with ESMTPSA id o9-20020aa7c7c9000000b0043cab10f702sm10711982eds.90.2022.08.17.07.36.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Aug 2022 07:36:20 -0700 (PDT) From: Dario Binacchi To: linux-kernel@vger.kernel.org Cc: Alexandre Torgue , Amarula patchwork , michael@amarulasolutions.com, Marc Kleine-Budde , Dario Binacchi , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Krzysztof Kozlowski , Maxime Coquelin , Paolo Abeni , Rob Herring , Wolfgang Grandegger , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-can@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, netdev@vger.kernel.org Subject: [RFC PATCH 0/4] can: bxcan: add support for ST bxCAN controller Date: Wed, 17 Aug 2022 16:35:25 +0200 Message-Id: <20220817143529.257908-1-dario.binacchi@amarulasolutions.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220817_073632_238365_ED6B3BB7 X-CRM114-Status: GOOD ( 16.86 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The series adds support for the basic extended CAN controller (bxCAN) found in many low- to middle-end STM32 SoCs. The driver has been tested on the stm32f469i-discovery board with a kernel version 5.19.0-rc2 in loopback + silent mode: ip link set can0 type can bitrate 125000 loopback on listen-only on ip link set up can0 candump can0 -L & cansend can0 300#AC.AB.AD.AE.75.49.AD.D1 For uboot and kernel compilation, as well as for rootfs creation I used buildroot: make stm32f469_disco_sd_defconfig make but I had to patch can-utils and busybox as can-utils and iproute are not compiled for MMU-less microcotrollers. In the case of can-utils, replacing the calls to fork() with vfork(), I was able to compile the package with working candump and cansend applications, while in the case of iproute, I ran into more than one problem and finally I decided to extend busybox's ip link command for CAN-type devices. I'm still wondering if it was really necessary, but this way I was able to test the driver. Dario Binacchi (4): dt-bindings: net: can: add STM32 bxcan DT bindings ARM: dts: stm32: add CAN support on stm32f429 ARM: dts: stm32: add pin map for CAN controller on stm32f4 can: bxcan: add support for ST bxCAN controller .../devicetree/bindings/net/can/st,bxcan.yaml | 139 +++ arch/arm/boot/dts/stm32f4-pinctrl.dtsi | 32 + arch/arm/boot/dts/stm32f429.dtsi | 30 + drivers/net/can/Kconfig | 1 + drivers/net/can/Makefile | 1 + drivers/net/can/bxcan/Kconfig | 34 + drivers/net/can/bxcan/Makefile | 4 + drivers/net/can/bxcan/bxcan-core.c | 201 ++++ drivers/net/can/bxcan/bxcan-core.h | 33 + drivers/net/can/bxcan/bxcan-drv.c | 980 ++++++++++++++++++ 10 files changed, 1455 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/can/st,bxcan.yaml create mode 100644 drivers/net/can/bxcan/Kconfig create mode 100644 drivers/net/can/bxcan/Makefile create mode 100644 drivers/net/can/bxcan/bxcan-core.c create mode 100644 drivers/net/can/bxcan/bxcan-core.h create mode 100644 drivers/net/can/bxcan/bxcan-drv.c