[PATCH v2 10/15] ARM: dts: imx6ul-var-som: add proper Wifi and Bluetooth support

From: Hugo Villeneuve

Date: Thu Mar 05 2026 - 13:10:13 EST

From: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>

Add proper support for the optional Wifi and Bluetooth configuration on
VAR-SOM-6UL so that it works out of the box, without any custom scripts.
The Wifi/BT module support is mutually exclusive with SD card interface.

Signed-off-by: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>
---
arch/arm/boot/dts/nxp/imx/Makefile | 2 +
.../dts/nxp/imx/imx6ul-var-som-common.dtsi | 18 ++---
.../nxp/imx/imx6ul-var-som-concerto-full.dts | 18 +++++
.../boot/dts/nxp/imx/imx6ul-var-som-wifi.dtsi | 75 +++++++++++++++++++
arch/arm/boot/dts/nxp/imx/imx6ul-var-som.dtsi | 15 ++++
.../nxp/imx/imx6ull-var-som-concerto-full.dts | 18 +++++
.../arm/boot/dts/nxp/imx/imx6ull-var-som.dtsi | 15 ++++
7 files changed, 151 insertions(+), 10 deletions(-)
create mode 100644 arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto-full.dts
create mode 100644 arch/arm/boot/dts/nxp/imx/imx6ul-var-som-wifi.dtsi
create mode 100644 arch/arm/boot/dts/nxp/imx/imx6ull-var-som-concerto-full.dts

diff --git a/arch/arm/boot/dts/nxp/imx/Makefile b/arch/arm/boot/dts/nxp/imx/Makefile
index 4f212569d2cdd..b81668dcaccf4 100644
--- a/arch/arm/boot/dts/nxp/imx/Makefile
+++ b/arch/arm/boot/dts/nxp/imx/Makefile
@@ -339,6 +339,7 @@ dtb-$(CONFIG_SOC_IMX6UL) += \
imx6ul-tx6ul-0011.dtb \
imx6ul-tx6ul-mainboard.dtb \
imx6ul-var-som-concerto.dtb \
+ imx6ul-var-som-concerto-full.dtb \
imx6ull-14x14-evk.dtb \
imx6ull-colibri-aster.dtb \
imx6ull-colibri-emmc-aster.dtb \
@@ -378,6 +379,7 @@ dtb-$(CONFIG_SOC_IMX6UL) += \
imx6ull-tqma6ull2l-mba6ulx.dtb \
imx6ull-uti260b.dtb \
imx6ull-var-som-concerto.dtb \
+ imx6ull-var-som-concerto-full.dtb \
imx6ulz-14x14-evk.dtb \
imx6ulz-bsh-smm-m2.dtb
dtb-$(CONFIG_SOC_IMX7D) += \
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-common.dtsi b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-common.dtsi
index dd4ecff1eb786..af8c5d2db53d4 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-common.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-common.dtsi
@@ -19,6 +19,14 @@ memory@80000000 {
reg = <0x80000000 0x20000000>;
};

+ reg_3p3v: regulator-3p3v {
+ compatible = "regulator-fixed";
+ regulator-name = "3P3V";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-always-on;
+ };
+
reg_gpio_dvfs: reg-gpio-dvfs {
compatible = "regulator-gpio";
regulator-min-microvolt = <1300000>;
@@ -68,9 +76,6 @@ ethphy0: ethernet-phy@1 {
};

&iomuxc {
- pinctrl-names = "default";
- pinctrl-0 = <&pinctrl_hog>;
-
pinctrl_enet1: enet1grp {
fsl,pins = <
MX6UL_PAD_ENET1_RX_EN__ENET1_RX_EN 0x1b0b0
@@ -97,13 +102,6 @@ MX6UL_PAD_GPIO1_IO07__ENET1_MDC 0x1b0b0
>;
};

- pinctrl_hog: hoggrp {
- fsl,pins = <
- MX6UL_PAD_SNVS_TAMPER4__GPIO5_IO04 0x1b0b0 /* BT Enable */
- MX6UL_PAD_SNVS_TAMPER6__GPIO5_IO06 0x03029 /* WLAN Enable */
- >;
- };
-
pinctrl_i2c1: i2c1grp {
fsl,pins = <
MX6UL_PAD_CSI_PIXCLK__I2C1_SCL 0x4001b8b0
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto-full.dts b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto-full.dts
new file mode 100644
index 0000000000000..519250b31db24
--- /dev/null
+++ b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto-full.dts
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Support for Variscite MX6 Concerto Carrier board with the VAR-SOM-6UL
+ * Variscite SoM mounted on it (6UL CPU variant).
+ *
+ * Copyright 2026 Dimonoff
+ */
+
+/dts-v1/;
+
+#include "imx6ul-var-som.dtsi"
+#include "imx6ul-var-som-concerto-common.dtsi"
+#include "imx6ul-var-som-wifi.dtsi"
+
+/ {
+ model = "Variscite VAR-SOM-6UL Concerto Board (6UL CPU)";
+ compatible = "variscite,mx6ulconcerto", "variscite,var-som-imx6ul", "fsl,imx6ul";
+};
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-wifi.dtsi b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-wifi.dtsi
new file mode 100644
index 0000000000000..6d16ff7909dab
--- /dev/null
+++ b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-wifi.dtsi
@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Support optional Wifi/Bluetooth on Variscite VAR-SOM-6UL module.
+ *
+ * Copyright 2019-2024 Variscite Ltd.
+ * Copyright 2026 Dimonoff
+ */
+
+/ {
+ reg_sd1_vmmc: regulator_sd1_vmmc {
+ compatible = "regulator-fixed";
+ regulator-name = "VMMC1";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ gpio = <&gpio5 2 GPIO_ACTIVE_HIGH>;
+ enable-active-high;
+ startup-delay-us = <10000>;
+ };
+
+ usdhc1_pwrseq: usdhc1-pwrseq {
+ compatible = "mmc-pwrseq-simple";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_brcm_wifi>;
+ reset-gpios = <&gpio5 6 GPIO_ACTIVE_LOW>;
+ };
+};
+
+&iomuxc {
+ pinctrl_32k_clk: 32kclkgrp {
+ /*
+ * For TP option, an additional oscillator is assembled on the
+ * SOM to provide 32 kHz to the WiFi module. Without TP option,
+ * this pin is configured to provide the 32 KHz clock to the
+ * WiFi module.
+ */
+ fsl,pins = <
+ MX6UL_PAD_GPIO1_IO03__OSC32K_32K_OUT 0x03029
+ >;
+ };
+};
+
+&tsc {
+ status = "disabled";
+};
+
+/* Bluetooth UART */
+&uart2 {
+ bluetooth {
+ compatible = "brcm,bcm43438-bt";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_brcm_bt>;
+ shutdown-gpios = <&gpio5 4 GPIO_ACTIVE_HIGH>;
+ vbat-supply = <&reg_3p3v>;
+ vddio-supply = <&reg_3p3v>;
+ };
+};
+
+&usdhc1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ pinctrl-names = "default", "state_100mhz", "state_200mhz";
+ pinctrl-0 = <&pinctrl_usdhc1>, <&pinctrl_32k_clk>;
+ pinctrl-1 = <&pinctrl_usdhc1_100mhz>, <&pinctrl_32k_clk>;
+ pinctrl-2 = <&pinctrl_usdhc1_200mhz>, <&pinctrl_32k_clk>;
+ no-1-8-v;
+ non-removable;
+ mmc-pwrseq = <&usdhc1_pwrseq>;
+ vmmc-supply = <&reg_sd1_vmmc>;
+ status = "okay";
+
+ brcmf: wifi@1 {
+ compatible = "brcm,bcm4329-fmac"; /* LWB option: Sterling LWB5 */
+ reg = <1>;
+ };
+};
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ul-var-som.dtsi b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som.dtsi
index 35a0c0b3603fd..b4e6a9316dd81 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6ul-var-som.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som.dtsi
@@ -15,3 +15,18 @@ / {
model = "Variscite VAR-SOM-6UL module";
compatible = "variscite,var-som-imx6ul", "fsl,imx6ul";
};
+
+&iomuxc {
+ pinctrl_brcm_bt: brcm-bt-grp {
+ fsl,pins = <
+ MX6UL_PAD_SNVS_TAMPER4__GPIO5_IO04 0x1b0b0 /* BT_REG_ON (BT_EN) */
+ >;
+ };
+
+ pinctrl_brcm_wifi: brcm-wifi-grp {
+ fsl,pins = <
+ MX6UL_PAD_SNVS_TAMPER2__GPIO5_IO02 0x1b0b0 /* WL_PWR (WIFI_PWR 5G) */
+ MX6UL_PAD_SNVS_TAMPER6__GPIO5_IO06 0x1b0b0 /* WL_REG_ON (WIFI_EN) */
+ >;
+ };
+};
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ull-var-som-concerto-full.dts b/arch/arm/boot/dts/nxp/imx/imx6ull-var-som-concerto-full.dts
new file mode 100644
index 0000000000000..7c0e313603630
--- /dev/null
+++ b/arch/arm/boot/dts/nxp/imx/imx6ull-var-som-concerto-full.dts
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Support for Variscite MX6 Concerto Carrier board with the VAR-SOM-6UL
+ * Variscite SoM mounted on it (6ULL CPU variant).
+ *
+ * Copyright 2026 Dimonoff
+ */
+
+/dts-v1/;
+
+#include "imx6ull-var-som.dtsi"
+#include "imx6ul-var-som-concerto-common.dtsi"
+#include "imx6ul-var-som-wifi.dtsi"
+
+/ {
+ model = "Variscite VAR-SOM-6UL Concerto Board (6ULL CPU)";
+ compatible = "variscite,mx6ullconcerto", "variscite,var-som-imx6ull", "fsl,imx6ull";
+};
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ull-var-som.dtsi b/arch/arm/boot/dts/nxp/imx/imx6ull-var-som.dtsi
index ba482a97623b2..3067ff6a1bc74 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6ull-var-som.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx6ull-var-som.dtsi
@@ -13,3 +13,18 @@ / {
model = "Variscite VAR-SOM-6UL module";
compatible = "variscite,var-som-imx6ull", "fsl,imx6ull";
};
+
+&iomuxc {
+ pinctrl_brcm_bt: brcm-bt-grp {
+ fsl,pins = <
+ MX6ULL_PAD_SNVS_TAMPER4__GPIO5_IO04 0x1b0b0 /* BT_REG_ON (BT_EN) */
+ >;
+ };
+
+ pinctrl_brcm_wifi: brcm-wifi-grp {
+ fsl,pins = <
+ MX6ULL_PAD_SNVS_TAMPER2__GPIO5_IO02 0x1b0b0 /* WL_PWR (WIFI_PWR 5G) */
+ MX6ULL_PAD_SNVS_TAMPER6__GPIO5_IO06 0x1b0b0 /* WL_REG_ON (WIFI_EN) */
+ >;
+ };
+};
--
2.47.3