linux-kernel - Re: [PATCH 2/2] arm64: dts: freescale: Add phyBOARD-Segin-i.MX91 support

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Message-ID: <20251021-bright-brave-dolphin-906891-mkl@pengutronix.de>
Date: Tue, 21 Oct 2025 11:50:13 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Primoz Fiser <primoz.fiser@...ik.com>
Cc: Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
	Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, devicetree@...r.kernel.org, 
	upstream@...ts.phytec.de, linux-kernel@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, imx@...ts.linux.dev
Subject: Re: [PATCH 2/2] arm64: dts: freescale: Add phyBOARD-Segin-i.MX91
 support

On 21.10.2025 11:37:04, Primoz Fiser wrote:
> Add initial support for the PHYTEC phyBOARD-Segin-i.MX91 board [1] based
> on the PHYTEC phyCORE-i.MX91 SoM (System-on-Module) [2].
> 
> Supported features:
> * Audio
> * CAN
> * eMMC
> * Ethernet
> * I2C
> * RTC
> * SD-Card
> * UART
> * USB
> 
> For more details see the product pages for the development board and the
> SoM:
> 
> [1] https://www.phytec.eu/en/produkte/development-kits/phyboard-segin-kit/
> [2] https://www.phytec.eu/en/produkte/system-on-modules/phycore-imx-91-93/
> 
> Signed-off-by: Primoz Fiser <primoz.fiser@...ik.com>
> ---
>  arch/arm64/boot/dts/freescale/Makefile        |   1 +
>  .../dts/freescale/imx91-phyboard-segin.dts    | 344 ++++++++++++++++++
>  .../boot/dts/freescale/imx91-phycore-som.dtsi | 304 ++++++++++++++++
>  3 files changed, 649 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/freescale/imx91-phyboard-segin.dts
>  create mode 100644 arch/arm64/boot/dts/freescale/imx91-phycore-som.dtsi
> 
> diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
> index 525ef180481d..34a81d34de39 100644
> --- a/arch/arm64/boot/dts/freescale/Makefile
> +++ b/arch/arm64/boot/dts/freescale/Makefile
> @@ -344,6 +344,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx8qxp-tqma8xqps-mb-smarc-2.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8ulp-9x9-evk.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8ulp-evk.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx91-11x11-evk.dtb
> +dtb-$(CONFIG_ARCH_MXC) += imx91-phyboard-segin.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx91-tqma9131-mba91xxca.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx93-9x9-qsb.dtb
>  
> diff --git a/arch/arm64/boot/dts/freescale/imx91-phyboard-segin.dts b/arch/arm64/boot/dts/freescale/imx91-phyboard-segin.dts
> new file mode 100644
> index 000000000000..bb631439f9cf
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/imx91-phyboard-segin.dts
> @@ -0,0 +1,344 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (C) 2025 PHYTEC Messtechnik GmbH
> + * Author: Christoph Stoidner <c.stoidner@...tec.de>
> + *
> + * Product homepage:
> + * phyBOARD-Segin carrier board is reused for the i.MX91 design.
> + * https://www.phytec.eu/en/produkte/single-board-computer/phyboard-segin-imx6ul/
> + */
> +/dts-v1/;
> +
> +#include "imx91-phycore-som.dtsi"
> +
> +/{
> +	model = "PHYTEC phyBOARD-Segin-i.MX91";
> +	compatible = "phytec,imx91-phyboard-segin", "phytec,imx91-phycore-som",
> +		     "fsl,imx91";
> +
> +	aliases {
> +		ethernet1 = &eqos;
> +		gpio0 = &gpio1;
> +		gpio1 = &gpio2;
> +		gpio2 = &gpio3;
> +		gpio3 = &gpio4;
> +		i2c0 = &lpi2c1;
> +		i2c1 = &lpi2c2;
> +		mmc0 = &usdhc1;
> +		mmc1 = &usdhc2;
> +		rtc0 = &i2c_rtc;
> +		rtc1 = &bbnsm_rtc;
> +		serial0 = &lpuart1;
> +	};
> +
> +	chosen {
> +		stdout-path = &lpuart1;
> +	};
> +
> +	flexcan1_tc: can-phy0 {
> +		compatible = "ti,tcan1043";
> +		#phy-cells = <0>;
> +		max-bitrate = <1000000>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_flexcan1_tc>;
> +		enable-gpios = <&gpio4 16 GPIO_ACTIVE_HIGH>;
> +	};

I think the tcan1043 is a CAN-FD transceiver. According to the datasheet
it support 2 MBit/s and 5 MBit/s in the "G" variant. However due to the
board layout, etc, the actual bit rate might still be limited to 1
MBit/s. Ask the HW engineers if in doubt.

regards,
Marc

-- 
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