[PATCH v2] arm64: dts: freescale: imx95-toradex-smarc: Support Cortex M7

[Emanuele Ghidoli]

From: Emanuele Ghidoli <emanuele.ghidoli@xxxxxxxxxxx>

Enable Cortex M7, the vring nodes, a mailbox and reserve DDR memory for
the M7. The remoteproc framework is so capable to load and run the M7
firmware.

Signed-off-by: Emanuele Ghidoli <emanuele.ghidoli@xxxxxxxxxxx>
---
Changes in v2:
- Use necessary node names (rsc-table, vdev*)

v1: https://lore.kernel.org/lkml/20260303121324.1576841-1-ghidoliemanuele@xxxxxxxxx/

 .../dts/freescale/imx95-toradex-smarc.dtsi    | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi b/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi
index 5932ba238a8a..748fd7d9e7e0 100644
--- a/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi
@@ -42,6 +42,16 @@ clk_serdes_eth_ref: clock-eth-ref {
 		enable-gpios = <&som_gpio_expander_1 13 GPIO_ACTIVE_HIGH>;
 	};
 
+	cm7: remoteproc-cm7 {
+		compatible = "fsl,imx95-cm7";
+		mbox-names = "tx", "rx", "rxdb";
+		mboxes = <&mu7 0 1
+			  &mu7 1 1
+			  &mu7 3 1>;
+		memory-region = <&vdevbuffer>, <&vdev0vring0>, <&vdev0vring1>,
+				<&vdev1vring0>, <&vdev1vring1>, <&rsc_table>, <&m7_reserved>;
+	};
+
 	connector {
 		compatible = "gpio-usb-b-connector", "usb-b-connector";
 		/* SMARC P64 - USB0_OTG_ID */
@@ -156,6 +166,42 @@ linux_cma: linux,cma {
 			alloc-ranges = <0 0x80000000 0 0x7f000000>;
 			linux,cma-default;
 		};
+
+		m7_reserved: memory@80000000 {
+			reg = <0 0x80000000 0 0x1000000>;
+			no-map;
+		};
+
+		rsc_table: rsc-table@88220000 {
+			reg = <0 0x88220000 0 0x1000>;
+			no-map;
+		};
+
+		vdev0vring0: vdev0vring0@88000000 {
+			reg = <0 0x88000000 0 0x8000>;
+			no-map;
+		};
+
+		vdev0vring1: vdev0vring1@88008000 {
+			reg = <0 0x88008000 0 0x8000>;
+			no-map;
+		};
+
+		vdev1vring0: vdev1vring0@88010000 {
+			reg = <0 0x88010000 0 0x8000>;
+			no-map;
+		};
+
+		vdev1vring1: vdev1vring1@88018000 {
+			reg = <0 0x88018000 0 0x8000>;
+			no-map;
+		};
+
+		vdevbuffer: vdevbuffer@88020000 {
+			compatible = "shared-dma-pool";
+			reg = <0 0x88020000 0 0x100000>;
+			no-map;
+		};
 	};
 };
 
@@ -572,6 +618,10 @@ &lpuart3 {
 	pinctrl-0 = <&pinctrl_uart3>;
 };
 
+&mu7 {
+	status = "okay";
+};
+
 /* SMARC MDIO, shared between all ethernet ports */
 &netc_emdio {
 	pinctrl-names = "default";
-- 
2.43.0