Re: [PATCH 09/14] ARM: dts: imx6ul-var-som: add proper Wifi and Bluetooth support

From: Hugo Villeneuve

Date: Mon Mar 02 2026 - 17:23:47 EST

On Mon, 2 Mar 2026 15:59:43 -0500
Frank Li <Frank.li@xxxxxxx> wrote:

> 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

This looks identical to the initial commit message?

> Add the optional Wifi and Bluetooth dtb on AR-SOM-6UL so that it works out
> of the box.

See comments below about name of dtb.

> 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?

There is an exponential number of possible configurations (sd + wifi,
eemc + wifi, eemc + eth and no wifi, etc). To simplify, I am simply
adding a full DTB which will support all options on the EVK.

Hugo.

> > 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 = <&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
> >
>

--
Hugo Villeneuve