lwn.git/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts, branch docs-next

arm64: dts: imx8mm-var-som-symphony: Enable PCIe

2026-03-27T13:52:39+00:00

Enable PCIe support on the VAR-SOM Symphony carrier board by adding the external reference clock, configuring the PHY and providing the required clock and reset properties. Signed-off-by: Stefano Radaelli Signed-off-by: Frank Li

arm64: dts: imx8mm-var-som-symphony: Enable I2C4

2026-03-27T13:52:39+00:00

Enable I2C4 on the Symphony carrier and add pinctrl configuration, including GPIO-based bus recovery support. Signed-off-by: Stefano Radaelli Signed-off-by: Frank Li

arm64: dts: imx8mm-var-som-symphony: Add TPM2 support

2026-03-27T13:52:38+00:00

Add support for the TPM2 device on the VAR-SOM Symphony carrier board. The ST33K TPM2 is connected over I2C, and A PCA6408 GPIO expander is used to control the reset signal required to release the TPM from reset. Add the PCA6408 GPIO expander and the ST33K TPM2 device node. Signed-off-by: Stefano Radaelli Signed-off-by: Frank Li

arm64: dts: imx8mm-var-som-symphony: Enable uSD on USDHC2

2026-03-27T13:52:38+00:00

Enable the microSD slot on the VAR-SOM Symphony carrier board. Configure USDHC2 with card-detect GPIO, pinctrl states for the supported bus speeds and the required VMMC supply. Update the VMMC regulator to match the latest carrier revision by moving the enable GPIO to GPIO4_IO22 and adding the required off-on delay. Signed-off-by: Stefano Radaelli Signed-off-by: Frank Li

arm64: dts: imx8mm-var-som-symphony: Move USB configuration from SOM

2026-03-27T13:52:37+00:00

Move the USB controller configuration out of the i.MX8MM VAR-SOM dtsi and into the VAR-SOM Symphony carrier board dts. The SOM does not provide any USB connectors and carrier boards may choose whether and how to route USB, therefore USB should be described in the carrier-specific device tree instead of the SOM include. While moving the nodes, align the Symphony USB description with the carrier design by enabling both USB controllers, wiring USB1 to the PTN5150 Type-C controller for dual-role operation, and updating the PHY tuning and VBUS regulator pinctrl (including a sleep state). Signed-off-by: Stefano Radaelli Signed-off-by: Frank Li

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

2026-03-27T13:52:34+00:00

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 Signed-off-by: Frank Li

arm64: dts: freescale: imx8mm-var-som: Update FEC support with MaxLinear PHY

2026-03-27T13:52:32+00:00

Update the FEC Ethernet controller on the i.MX8MM VAR-SOM to match the latest SOM hardware revision using the integrated MaxLinear MXL86110 PHY. Add the PHY VDDIO supply regulator, adjust reset timings and add a pinctrl sleep state for low-power operation. The PHY LED signals originate on the SOM, but the actual LEDs are part of the carrier implementation (RJ45 connector). Move the LED configuration to the Symphony carrier device tree, matching the evaluation board LED wiring. Wake-on-LAN via magic packet is not supported at the VAR-SOM level and is therefore not enabled in the SOM device tree nor in the official evaluation carrier board configuration (symphony). Designs requiring WoL support may enable it in their own carrier-specific device trees if properly integrated at the hardware level. Signed-off-by: Stefano Radaelli Signed-off-by: Frank Li

arm64: dts: freescale: imx8mm-var-som: Move UART4 description to Symphony

2026-03-27T13:52:31+00:00

The VAR-SOM-MX8MM module does not provide an onboard debug console. UART4 is routed and exposed only on the Symphony carrier board, while custom carrier designs may choose to expose a different UART. Move the UART4 node from the SOM device tree to the imx8mm-var-som-symphony.dts, keeping the SOM dtsi limited to hardware present on the module itself. Signed-off-by: Stefano Radaelli Signed-off-by: Frank Li

arm64: dts: imx8mm-var-som-symphony: drop redundant status from typec

2024-04-22T04:11:49+00:00

"okay" is the default status, so drop redundant property from the typec node. Signed-off-by: Krzysztof Kozlowski Signed-off-by: Shawn Guo

arm64: dts: freescale: align gpio-key node names with dtschema

2022-06-19T08:10:14+00:00

The node names should be generic and DT schema expects certain pattern (e.g. with key/button/switch). Signed-off-by: Krzysztof Kozlowski Signed-off-by: Shawn Guo