[PATCH v2 4/5] arm64: dts: freescale: imx95-aquila: Add Cortex-M7 UART_4 overlay

[Ernest Van Hoecke]

From: Ernest Van Hoecke <ernest.vanhoecke at toradex.com>

Aquila UART_4 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 Aquila iMX95 Development Board device tree to provide
a ready-to-use DTB. Firmware must configure the UART and its pads for
the intended MCU application.

Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke at toradex.com>
---
 arch/arm64/boot/dts/freescale/Makefile          | 2 ++
 arch/arm64/boot/dts/freescale/imx95-aquila.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 f957797d90a6..12786932858a 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -968,6 +968,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx95-19x19-evk.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-19x19-evk-sof.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-19x19-frdm-pro.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-aquila-clover.dtb
+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
@@ -989,6 +990,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-mallow.dtb
 dtb-$(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-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-aquila.dtsi b/arch/arm64/boot/dts/freescale/imx95-aquila.dtsi
index c5f4cf0541f2..d4e8768f382c 100644
--- a/arch/arm64/boot/dts/freescale/imx95-aquila.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx95-aquila.dtsi
@@ -553,7 +553,7 @@ &lpuart1 {
 };
 
 /* Aquila UART_4 */
-&lpuart2 {
+uart_mcu: &lpuart2 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_uart2>;
 };

-- 
2.43.0