[PATCH v3 5/6] arm64: dts: imx8mm: imx8mp: Add FIO1 DTOs for Data Modul i.MX8M Mini and Plus eDM SBC

Marek Vasut
2026-04-07T21:18:59Z

Add DT overlay for feature connector expansion module eDM-MOD-iMX8Mm-FIO1
providing additional UARTs, CAN, PWM Beeper, I2C, SPI and GPIO breakout.
This adapter can be optionally populated onto the eDM SBC.

Signed-off-by: Marek Vasut <marex@nabladev.com>
---
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Frank Li <Frank.Li@nxp.com>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Rob Herring <robh@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: devicetree@vger.kernel.org
Cc: imx@lists.linux.dev
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
V2: Deduplicate the DTOs further
V3: New patch split from the original megapatch
---
arch/arm64/boot/dts/freescale/Makefile | 12 ++++
...l-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtsi | 69 +++++++++++++++++++
...l-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtso | 59 ++++++++++++++++
...l-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtso | 46 +++++++++++++
4 files changed, 186 insertions(+)
create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtsi
create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtso
create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtso

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 2dc1c1b6d81f8..27504fbfcf194 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -120,6 +120,10 @@ imx8mm-data-modul-edm-sbc-overlay-cm4-dtbs := \
imx8mm-data-modul-edm-sbc.dtb \
imx8mm-data-modul-edm-sbc-overlay-cm4.dtbo

+imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-dtbs := \
+ imx8mm-data-modul-edm-sbc.dtb \
+ imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtbo
+
imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi-dtbs := \
imx8mm-data-modul-edm-sbc.dtb \
imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi.dtbo
@@ -159,6 +163,8 @@ imx8mm-data-modul-edm-sbc-overlay-edm-sbc-imx8mm-rev900-dtbs := \
dtb-$(CONFIG_ARCH_MXC) += imx8mm-data-modul-edm-sbc.dtb \
imx8mm-data-modul-edm-sbc-overlay-cm4.dtb \
imx8mm-data-modul-edm-sbc-overlay-cm4.dtbo \
+ imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtb \
+ imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtbo \
imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi.dtb \
imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi.dtbo \
imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-lvds-g070y2-l01.dtb \
@@ -304,6 +310,10 @@ imx8mp-data-modul-edm-sbc-overlay-cm7-dtbs := \
imx8mp-data-modul-edm-sbc.dtb \
imx8mp-data-modul-edm-sbc-overlay-cm7.dtbo

+imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-dtbs := \
+ imx8mp-data-modul-edm-sbc.dtb \
+ imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtbo
+
imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi-dtbs := \
imx8mp-data-modul-edm-sbc.dtb \
imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi.dtbo
@@ -385,6 +395,8 @@ imx8mp-data-modul-edm-sbc-overlay-edm-sbc-imx8mp-rev902-dtbs := \
dtb-$(CONFIG_ARCH_MXC) += imx8mp-data-modul-edm-sbc.dtb \
imx8mp-data-modul-edm-sbc-overlay-cm7.dtb \
imx8mp-data-modul-edm-sbc-overlay-cm7.dtbo \
+ imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtb \
+ imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtbo \
imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi.dtb \
imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi.dtbo \
imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-lvds-g070y2-l01.dtb \
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtsi
new file mode 100644
index 0000000000000..7851ca73ccd8e
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtsi
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2026 Marek Vasut
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+&{/} {
+ can_osc: can-osc {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <20000000>;
+ };
+};
+
+&ecspi2 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ can_fio: can@0 {
+ compatible = "microchip,mcp2515";
+ reg = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_can>;
+ clocks = <&can_osc>;
+ spi-max-frequency = <5000000>;
+ };
+};
+
+&i2c_feature { /* Feature connector I2C */
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ gpio_feature: io-expander@20 {
+ compatible = "nxp,pca9554";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_gpio_expander>;
+ reg = <0x20>;
+ #gpio-cells = <2>;
+ gpio-controller;
+ #interrupt-cells = <2>;
+ interrupt-controller;
+ interrupt-parent = <&gpio4>;
+ interrupts = <27 IRQ_TYPE_LEVEL_LOW>;
+ gpio-line-names =
+ "GPIO1_output", "GPIO1_input",
+ "GPIO2_output", "GPIO2_input",
+ "GPIO3_output", "GPIO3_input",
+ "PCA9511A_READY", "";
+ };
+
+ eeprom@50 {
+ compatible = "atmel,24c32";
+ reg = <0x50>;
+ pagesize = <32>;
+ };
+};
+
+&uart1 { /* J500/J501 */
+ status = "okay";
+};
+
+&uart2 { /* RS485 J302/J303 */
+ linux,rs485-enabled-at-boot-time;
+ uart-has-rtscts;
+ status = "okay";
+};
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtso b/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtso
new file mode 100644
index 0000000000000..ad410db5f5b76
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtso
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2022-2026 Marek Vasut
+ */
+/dts-v1/;
+/plugin/;
+
+#include "imx8mm-pinfunc.h"
+#include "imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtsi"
+
+&{/} {
+ beeper {
+ compatible = "pwm-beeper";
+ beeper-hz = <1000>;
+ pwms = <&pwm3 0 250000 0>;
+ };
+};
+
+&can_fio {
+ interrupts-extended = <&gpio4 25 IRQ_TYPE_LEVEL_LOW>;
+};
+
+&iomuxc {
+ pinctrl_can: can-feature-grp {
+ fsl,pins = <
+ /* CAN_INT# */
+ MX8MM_IOMUXC_SAI2_TXC_GPIO4_IO25 0x400000d6
+ /* CAN_RST# */
+ MX8MM_IOMUXC_SAI2_TXD0_GPIO4_IO26 0x6
+ >;
+ };
+
+ pinctrl_gpio_expander: gpio-expander-feature-grp {
+ fsl,pins = <
+ /* GPIO4_IO27 */
+ MX8MM_IOMUXC_SAI2_MCLK_GPIO4_IO27 0x6
+ >;
+ };
+
+ pinctrl_pwm3: pwm3-buzzer-feature-grp {
+ fsl,pins = <
+ /* Buzzer PWM output */
+ MX8MM_IOMUXC_SPDIF_TX_PWM3_OUT 0x100
+ >;
+ };
+};
+
+&pinctrl_hog_feature {
+ fsl,pins = <
+ /* GPIO5_IO04 */
+ MX8MM_IOMUXC_SPDIF_RX_GPIO5_IO4 0x6
+ >;
+};
+
+&pwm3 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_pwm3>;
+ status = "okay";
+};
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtso b/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtso
new file mode 100644
index 0000000000000..0eccb7f7c0a8c
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtso
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2022-2026 Marek Vasut
+ */
+/dts-v1/;
+/plugin/;
+
+#include "imx8mp-pinfunc.h"
+#include "imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1.dtsi"
+
+&can_fio {
+ interrupts-extended = <&gpio2 10 IRQ_TYPE_LEVEL_LOW>;
+};
+
+&iomuxc {
+ pinctrl_can: can-feature-grp {
+ fsl,pins = <
+ /* CAN_INT# */
+ MX8MP_IOMUXC_SD1_RESET_B__GPIO2_IO10 0x400000d6
+ >;
+ };
+
+ pinctrl_gpio_expander: gpio-expander-feature-grp {
+ fsl,pins = <
+ /* GPIO4_IO27 */
+ MX8MP_IOMUXC_SAI2_MCLK__GPIO4_IO27 0x6
+ >;
+ };
+};
+
+&pinctrl_sai2 {
+ fsl,pins = <
+ MX8MP_IOMUXC_SAI2_TXFS__AUDIOMIX_SAI2_TX_SYNC 0xd6
+ MX8MP_IOMUXC_SAI2_TXD0__AUDIOMIX_SAI2_TX_DATA00 0xd6
+ MX8MP_IOMUXC_SAI2_TXC__AUDIOMIX_SAI2_TX_BCLK 0xd6
+ >;
+};
+
+&pinctrl_hog_feature {
+ fsl,pins = <
+ /* GPIO5_IO03 */
+ MX8MP_IOMUXC_GPIO1_IO07__GPIO1_IO07 0x40000006
+ /* GPIO5_IO04 */
+ MX8MP_IOMUXC_GPIO1_IO08__GPIO1_IO08 0x40000006
+ >;
+};
--
2.53.0