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

Marek Vasut
2026-04-07T21:19:01Z

Add DT overlay for feature connector expansion module eDM-MOD-iMX8Mm-FIO1-Audio
providing additional UARTs, CAN, PWM Beeper, I2C, SPI, GPIO breakout and
SGTL5000 codec. This adapter can be optionally populated onto the eDM SBC.

Signed-off-by: Marek Vasut <marex@nabladev.com>
---
DEPENDS:
- https://patchwork.kernel.org/project/linux-clk/patch/20260407211123.77602-1-marex@nabladev.com/
https://patchwork.kernel.org/project/linux-clk/patch/20260407211123.77602-2-marex@nabladev.com/
https://patchwork.kernel.org/project/linux-clk/patch/20260407211123.77602-3-marex@nabladev.com/
https://patchwork.kernel.org/project/linux-clk/patch/20260407211123.77602-4-marex@nabladev.com/
https://patchwork.kernel.org/project/linux-clk/patch/20260407211123.77602-5-marex@nabladev.com/
https://patchwork.kernel.org/project/linux-clk/patch/20260407211123.77602-6-marex@nabladev.com/
- https://patchwork.kernel.org/project/devicetree/patch/20260404183547.46509-1-marex@nabladev.com/
https://patchwork.kernel.org/project/devicetree/patch/20260404183547.46509-2-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 +++
...sbc-overlay-edm-mod-imx8mm-fio1-audio.dtsi | 101 ++++++++++++++++++
...sbc-overlay-edm-mod-imx8mm-fio1-audio.dtso | 74 +++++++++++++
...sbc-overlay-edm-mod-imx8mm-fio1-audio.dtso | 62 +++++++++++
4 files changed, 249 insertions(+)
create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.dtsi
create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.dtso
create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.dtso

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 27504fbfcf194..44385fb05c533 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -124,6 +124,10 @@ 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-fio1-audio-dtbs := \
+ imx8mm-data-modul-edm-sbc.dtb \
+ imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.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
@@ -165,6 +169,8 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-data-modul-edm-sbc.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-fio1-audio.dtb \
+ imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.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 \
@@ -314,6 +320,10 @@ 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-fio1-audio-dtbs := \
+ imx8mp-data-modul-edm-sbc.dtb \
+ imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.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
@@ -397,6 +407,8 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mp-data-modul-edm-sbc.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-fio1-audio.dtb \
+ imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.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-audio.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.dtsi
new file mode 100644
index 0000000000000..c622213c12747
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.dtsi
@@ -0,0 +1,101 @@
+// 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>;
+ };
+
+ sound-fio {
+ compatible = "simple-audio-card";
+ simple-audio-card,name = "SGTL5000-FIO1";
+ simple-audio-card,format = "i2s";
+ simple-audio-card,bitclock-master = <&codec_dai_fio>;
+ simple-audio-card,frame-master = <&codec_dai_fio>;
+ simple-audio-card,widgets = "Headphone", "Headphone Jack";
+ simple-audio-card,routing = "Headphone Jack", "HP_OUT";
+
+ simple-audio-card,cpu {
+ sound-dai = <&sai2>;
+ };
+
+ codec_dai_fio: simple-audio-card,codec {
+ sound-dai = <&sgtl5000_fio>;
+ };
+ };
+};
+
+&ecspi2 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ can_fio: can@0 {
+ compatible = "microchip,mcp2518fd";
+ reg = <0>;
+ clocks = <&can_osc>;
+ spi-max-frequency = <10000000>;
+ };
+};
+
+&i2c_feature { /* Feature connector I2C */
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ sgtl5000_fio: codec@a {
+ #sound-dai-cells = <0>;
+ compatible = "fsl,sgtl5000";
+ reg = <0x0a>;
+ clocks = <&sai5clk 1>;
+ VDDA-supply = <&buck4_reg>;
+ VDDD-supply = <&buck5_reg>;
+ VDDIO-supply = <&buck4_reg>;
+ };
+
+ gpio_feature: io-expander@20 {
+ compatible = "nxp,pca9554";
+ reg = <0x20>;
+ #gpio-cells = <2>;
+ gpio-controller;
+ #interrupt-cells = <2>;
+ interrupt-controller;
+ interrupt-parent = <&gpio5>;
+ interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
+ gpio-line-names =
+ "GPI0", "GPI1", "GPI2", "GPI3",
+ "GPO0", "GPO1", "GPO2", "GPO3";
+ };
+
+ eeprom@50 {
+ compatible = "atmel,24c32";
+ reg = <0x50>;
+ pagesize = <32>;
+ };
+};
+
+&sai2 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_sai2>;
+ assigned-clock-rates = <24576000>;
+ fsl,sai-asynchronous;
+ fsl,sai-mclk-direction-output;
+ status = "okay";
+};
+
+&uart2 { /* RS422 J12 */
+ linux,rs485-enabled-at-boot-time;
+ uart-has-rtscts;
+ status = "okay";
+};
+
+/* UART4 is blocked by RDC and used as CM4 console UART */
+&uart4 { /* UART to 1-Wire J5 */
+ status = "disabled";
+};
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.dtso b/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.dtso
new file mode 100644
index 0000000000000..4a02bd026ac16
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.dtso
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2024-2026 Marek Vasut
+ */
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/clock/imx8mm-clock.h>
+
+#include "imx8mm-pinfunc.h"
+#include "imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.dtsi"
+
+&can_fio {
+ interrupts-extended = <&gpio4 25 IRQ_TYPE_LEVEL_LOW>;
+};
+
+&iomuxc {
+ pinctrl_codec_mclk: codec-mclk_feature-grp {
+ fsl,pins = <
+ /* GPIO4_IO27 */
+ MX8MM_IOMUXC_SAI2_MCLK_SAI5_MCLK 0x2
+ >;
+ };
+
+ pinctrl_sai2: sai2_feature-grp {
+ fsl,pins = <
+ MX8MM_IOMUXC_SAI2_RXC_SAI2_RX_BCLK 0x90
+ MX8MM_IOMUXC_SAI2_TXD0_SAI2_TX_DATA0 0x96
+ MX8MM_IOMUXC_SAI2_RXD0_SAI2_RX_DATA0 0x90
+ MX8MM_IOMUXC_SAI2_TXFS_SAI2_TX_SYNC 0x96
+ >;
+ };
+};
+
+&pinctrl_hog_feature {
+ fsl,pins = <
+ /* GPIO5_IO03 */
+ MX8MM_IOMUXC_SPDIF_TX_GPIO5_IO3 0x40000006
+ /* GPIO5_IO04 */
+ MX8MM_IOMUXC_SPDIF_RX_GPIO5_IO4 0x40000006
+
+ /* CAN_INT# */
+ MX8MM_IOMUXC_SAI2_TXC_GPIO4_IO25 0x40000090
+ >;
+};
+
+&sai2 {
+ assigned-clocks = <&clk IMX8MM_CLK_SAI2>;
+ assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>;
+ fsl,sai-bit-clock-swap;
+};
+
+&spba2 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ sai5clk: clock-controller@30050000 { /* SAI5 */
+ compatible = "fsl,imx8mm-sai-clock", "fsl,imx8mq-sai-clock";
+ reg = <0x30050000 0x10000>;
+ #clock-cells = <1>;
+ clocks = <&clk IMX8MM_CLK_SAI5_IPG>,
+ <&clk IMX8MM_CLK_SAI5_ROOT>;
+ clock-names = "bus", "mclk1";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_codec_mclk>;
+ assigned-clocks = <&clk IMX8MM_CLK_SAI5>,
+ <&clk IMX8MM_CLK_CLKOUT1_SEL>,
+ <&clk IMX8MM_CLK_CLKOUT2_SEL>;
+ assigned-clock-parents = <&clk IMX8MM_CLK_24M>,
+ <&clk IMX8MM_CLK_24M>,
+ <&clk IMX8MM_CLK_24M>;
+ assigned-clock-rates = <24000000>;
+ };
+};
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.dtso b/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.dtso
new file mode 100644
index 0000000000000..90c2dd1e67248
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.dtso
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2024-2026 Marek Vasut
+ */
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/clock/imx8mp-clock.h>
+
+#include "imx8mp-pinfunc.h"
+#include "imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-fio1-audio.dtsi"
+
+&can_fio {
+ interrupts-extended = <&gpio2 10 IRQ_TYPE_LEVEL_LOW>;
+};
+
+&iomuxc {
+ pinctrl_codec_mclk: codec-mclk_feature-grp {
+ fsl,pins = <
+ MX8MP_IOMUXC_SAI2_MCLK__AUDIOMIX_SAI5_MCLK 0xd6
+ >;
+ };
+
+ sai2-grp {
+ 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
+ MX8MP_IOMUXC_SAI2_RXD0__AUDIOMIX_SAI2_RX_DATA00 0xd6
+ >;
+ };
+
+ uart1-grp {
+ fsl,pins = <
+ MX8MP_IOMUXC_SD1_CLK__UART1_DCE_TX 0x49
+ MX8MP_IOMUXC_SD1_CMD__UART1_DCE_RX 0x49
+ MX8MP_IOMUXC_SD1_DATA1__UART1_DCE_CTS 0x49
+ >;
+ };
+};
+
+&sai2 {
+ assigned-clocks = <&clk IMX8MP_CLK_SAI2>;
+ assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL2_OUT>;
+};
+
+&spba5 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ sai5clk: clock-controller@30c50000 {
+ compatible = "fsl,imx8mp-sai-clock", "fsl,imx8mq-sai-clock";
+ reg = <0x30c50000 0x10000>;
+ #clock-cells = <1>;
+ clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_SAI5_IPG>,
+ <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_SAI5_MCLK1>;
+ clock-names = "bus", "mclk1";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_codec_mclk>;
+ status = "okay";
+ };
+};
--
2.53.0