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arm64: dts: imx91-9x9-qsb: add CAN support overlay file

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On the i.MX91 9x9 QSB, CAN1 and MICFIL share pins. A TMUX1574RSVR
analog mux controls the routing: when SEL is driven high, CAN1 is
selected; when SEL is driven low, MICFIL is selected. By default,
SEL is kept low.

To enable CAN1, SEL must be driven high. This is done via the can_fun
function defined in the pinctrl-gpiomux node. CAN1 uses the
TJA1057GT/3 PHY.

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
This commit is contained in:
Haibo Chen 2026-07-10 18:12:20 +08:00 committed by Frank Li
parent a40fdbf706
commit 356894c37a
2 changed files with 50 additions and 0 deletions
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2
arch/arm64/boot/dts/freescale/Makefile
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@ -580,7 +580,9 @@ dtb-$(CONFIG_ARCH_MXC) += imx91-11x11-frdm.dtb
dtb-$(CONFIG_ARCH_MXC) += imx91-11x11-frdm-s.dtb
dtb-$(CONFIG_ARCH_MXC) += imx91-phyboard-segin.dtb
imx91-9x9-qsb-can1-dtbs += imx91-9x9-qsb.dtb imx91-9x9-qsb-can1.dtbo
imx91-phyboard-segin-peb-av-18-dtbs += imx91-phyboard-segin.dtb imx91-phyboard-segin-peb-av-18.dtbo
dtb-$(CONFIG_ARCH_MXC) += imx91-9x9-qsb-can1.dtb
dtb-$(CONFIG_ARCH_MXC) += imx91-phyboard-segin-peb-av-18.dtb
dtb-$(CONFIG_ARCH_MXC) += imx91-tqma9131-mba91xxca.dtb

48
arch/arm64/boot/dts/freescale/imx91-9x9-qsb-can1.dtso Normal file
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@ -0,0 +1,48 @@
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
* Copyright 2026 NXP
*/
#include <dt-bindings/gpio/gpio.h>
#include "imx91-pinfunc.h"
/dts-v1/;
/plugin/;
&{/} {
flexcan_phy: can-phy {
compatible = "nxp,tja1057";
#phy-cells = <0>;
max-bitrate = <5000000>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_flexcan_phy>;
silent-gpios = <&gpio1 10 GPIO_ACTIVE_HIGH>;
};
};
&flexcan1 {
phys = <&flexcan_phy>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_flexcan1>, <&can_fun>;
status = "okay";
};
&iomuxc {
pinctrl_flexcan_phy: flexcanphygrp {
fsl,pins = <
MX91_PAD_PDM_BIT_STREAM1__GPIO1_IO10 0x31e
>;
};
pinctrl_flexcan1: flexcan1grp {
fsl,pins = <
MX91_PAD_PDM_CLK__CAN1_TX 0x139e
MX91_PAD_PDM_BIT_STREAM0__CAN1_RX 0x139e
>;
};
};
/* micfil uses PDM port A pins, conflicts with can1 */
&micfil {
status = "disabled";
};