Re: [PATCH 09/14] ARM: dts: imx6ul-var-som: add proper Wifi and Bluetooth support
From: Frank Li
Date: Mon Mar 02 2026 - 16:51:45 EST
On Mon, Mar 02, 2026 at 02:03:45PM -0500, Hugo Villeneuve wrote:
> From: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>
>
> The existing configuration of the optional Wifi/Bluetooth module was
> copied from the original Variscite kernel tree, and requires custom
> scripts to properly configure the Wifi/Bluetooth module.
>
> 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 SD card interface cannot be used if the Wifi/BT module is in use.
ARM: dts: imx6ul-var-som: add proper Wifi and Bluetooth support
Add the optional Wifi and Bluetooth dtb on AR-SOM-6UL so that it works out
of the box.
The SD card interface cannot be used if the Wifi/BT module is in use.
>
> 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 bc534d0fb1412..c7f24ee63071f 100644
> --- a/arch/arm/boot/dts/nxp/imx/Makefile
> +++ b/arch/arm/boot/dts/nxp/imx/Makefile
> @@ -339,6 +339,7 @@ dtb-$(CONFIG_SOC_IMX6UL) += \
> imx6ul-tx6ul-0011.dtb \
> imx6ul-tx6ul-mainboard.dtb \
> imx6ul-var-som-concerto.dtb \
> + imx6ul-var-som-concerto-full.dtb \
how about imx6ul-var-som-concerto-wifi.dtb?
> imx6ull-14x14-evk.dtb \
> imx6ull-colibri-aster.dtb \
> imx6ull-colibri-emmc-aster.dtb \
> @@ -377,6 +378,7 @@ dtb-$(CONFIG_SOC_IMX6UL) += \
> imx6ull-tqma6ull2-mba6ulx.dtb \
> imx6ull-tqma6ull2l-mba6ulx.dtb \
> imx6ull-var-som-concerto.dtb \
> + imx6ull-var-som-concerto-full.dtb \
> imx6ull-uti260b.dtb \
> imx6ulz-14x14-evk.dtb \
> imx6ulz-bsh-smm-m2.dtb
> 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 = <®_3p3v>;
> + vddio-supply = <®_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 = <®_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
>