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arm64: dts: freescale: imx8mm-var-som: Rework WiFi/BT and add legacy dts

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The VAR-SOM-MX8MM currently integrates the NXP IW61x wireless module,
providing WiFi over SDIO and Bluetooth over UART.

Move the wireless module configuration out of the base
imx8mm-var-som.dtsi and provide dedicated variant includes.
The IW61x configuration is moved to imx8mm-var-som-wifi-bt-iw61x.dtsi
and used by the Symphony evaluation board device tree.

A separate imx8mm-var-som-wifi-brcm-legacy.dtsi include is added to keep
the configuration for the legacy Broadcom SDIO WiFi module used on
earlier SOM revisions.

To preserve compatibility with older SOM revisions, add a separate
imx8mm-var-som-symphony-legacy.dtb, which disables the IW61x setup and
applies the Broadcom-specific configuration.

The Broadcom-based SOM revision is no longer in production, but support
is kept for existing users.

Signed-off-by: Stefano Radaelli <stefano.r@variscite.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
This commit is contained in:
Stefano Radaelli 2026-03-19 19:40:26 +01:00 • committed by Frank Li
commit 8e7ce17e6d
6 changed files with 78 additions and 6 deletions
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