[PATCH v2 5/5] arm64: dts: freescale: imx95-toradex-smarc: Add Cortex-M7 SER0 overlay

[Ernest Van Hoecke]

From: Ernest Van Hoecke <ernest.vanhoecke@xxxxxxxxxxx>

SMARC SER0 can be assigned to Cortex-M7 firmware. Label it uart_mcu so
the shared imx-tdx-uart-mcu overlay can reserve it, and combine the
overlay with the Toradex SMARC iMX95 Development Board device tree to
provide a ready-to-use DTB. On the Development Board this removes the
Linux RS485 port on SER0, while the console on SER1 (LPUART1) remains
available. Firmware must configure the UART and its pads for the
intended MCU application.

Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@xxxxxxxxxxx>
---
 arch/arm64/boot/dts/freescale/Makefile                 | 2 ++
 arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 12786932858a..68db39369e45 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -972,6 +972,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx95-aquila-dev-uart4-mcu.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-aquila-dev.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-navq.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-toradex-osm-dev.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx95-toradex-smarc-dev-ser0-mcu.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-toradex-smarc-dev.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-tqma9596la-mba95xxca.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-tqma9596sa-mb-smarc-2.dtb
@@ -991,6 +992,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-yavia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-zinnia.dtb
 
 imx95-aquila-dev-uart4-mcu-dtbs := imx95-aquila-dev.dtb imx-tdx-uart-mcu.dtbo
+imx95-toradex-smarc-dev-ser0-mcu-dtbs := imx95-toradex-smarc-dev.dtb imx-tdx-uart-mcu.dtbo
 imx95-verdin-wifi-dev-uart4-mcu-dtbs := imx95-verdin-wifi-dev.dtb imx-tdx-uart-mcu.dtbo
 
 imx95-15x15-evk-pcie-dtbs += imx95-15x15-evk.dtb imx-m2-pcie.dtbo
diff --git a/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi b/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi
index 641573c9943e..f3504b40ebb2 100644
--- a/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi
@@ -619,7 +619,7 @@ &lpuart1 {
 };
 
 /* SMARC SER0 */
-&lpuart2 {
+uart_mcu: &lpuart2 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_uart2>;
 	uart-has-rtscts;

-- 
2.43.0