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[93.35.179.236]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48527681a3esm261097785e9.4.2026.03.07.07.55.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 07 Mar 2026 07:55:16 -0800 (PST) From: Stefano Radaelli To: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: pierluigi.p@variscite.com, Stefano Radaelli , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam Subject: [PATCH v3 05/11] arm64: dts: freescale: imx8mm-var-som: Add MCP251xFD CAN controller Date: Sat, 7 Mar 2026 16:54:41 +0100 Message-ID: X-Mailer: git-send-email 2.47.3 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Stefano Radaelli From: Stefano Radaelli Add support for the Microchip MCP251xFD CAN-FD controller connected to the SPI bus on the i.MX8MM VAR-SOM. The controller uses a 40 MHz external oscillator and requires an interrupt line and a dedicated RX interrupt GPIO. This patch adds the fixed clock, the MCP251xFD device node with the required properties, and the corresponding pinctrl configuration. Signed-off-by: Stefano Radaelli --- v2->v3: -=20 v1->v2: -=20 .../boot/dts/freescale/imx8mm-var-som.dtsi | 27 +++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi b/arch/arm64= /boot/dts/freescale/imx8mm-var-som.dtsi index 7cedef8add32..21a4d87c0e26 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi @@ -14,6 +14,13 @@ memory@40000000 { reg =3D <0x0 0x40000000 0 0x80000000>; }; =20 + clk40m: oscillator { + compatible =3D "fixed-clock"; + #clock-cells =3D <0>; + clock-frequency =3D <40000000>; + clock-output-names =3D "can_osc"; + }; + reg_audio_supply: regulator-3p3v { compatible =3D "regulator-fixed"; regulator-name =3D "wm8904-supply"; @@ -139,6 +146,19 @@ touchscreen@0 { ti,keep-vref-on; wakeup-source; }; + + /* CAN controller */ + can0: can@1 { + compatible =3D "microchip,mcp251xfd"; + reg =3D <1>; + clocks =3D <&clk40m>; + pinctrl-names =3D "default"; + pinctrl-0 =3D <&pinctrl_can>; + interrupt-parent =3D <&gpio1>; + interrupts =3D <5 IRQ_TYPE_LEVEL_LOW>; + microchip,rx-int-gpios =3D <&gpio2 12 GPIO_ACTIVE_LOW>; + spi-max-frequency =3D <20000000>; + }; }; =20 &fec1 { @@ -424,6 +444,13 @@ &wdog1 { }; =20 &iomuxc { + pinctrl_can: cangrp { + fsl,pins =3D < + MX8MM_IOMUXC_GPIO1_IO05_GPIO1_IO5 0x16 + MX8MM_IOMUXC_SD2_CD_B_GPIO2_IO12 0x16 + >; + }; + pinctrl_ecspi1: ecspi1grp { fsl,pins =3D < MX8MM_IOMUXC_ECSPI1_SCLK_ECSPI1_SCLK 0x13 --=20 2.47.3