[PATCH v9 5/7] arm64: dts: imx8mm: imx8mp: Add CM DTOs for Data Modul i.MX8M Mini and Plus eDM SBC

Add DT overlay which adds CM4/CM7 extras so that CM4/CM7 firmware could
be used with remoteproc and rpmsg, but without imposing the overhead
on every user of the platform. The CM4 variant applies to i.MX8M Mini,
while the CM7 variant applies to i.MX8M Plus .

Signed-off-by: Marek Vasut <marex-TPsgXmltDcZWk0Htik3J/[email protected]>
---
Cc: Conor Dooley <[email protected]>
Cc: Fabio Estevam <[email protected]>
Cc: Frank Li <[email protected]>
Cc: Krzysztof Kozlowski <[email protected]>
Cc: Pengutronix Kernel Team <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Sascha Hauer <[email protected]>
Cc: [email protected]
Cc: imx-cunTk1MwBs/[email protected]
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: [email protected]
---
V2: Deduplicate the DTOs further
V3: New patch split from the original megapatch
V4: Rebase on next-20260703
V5: Change vdevbuffer to vdev0buffer as requested by maintainer
V6: No change
V7: No change
V8: No change
V9: No change
---
 arch/arm64/boot/dts/freescale/Makefile        | 12 ++++
 ...imx8mm-data-modul-edm-sbc-overlay-cm4.dtso | 56 ++++++++++++++++++
 ...imx8mp-data-modul-edm-sbc-overlay-cm7.dtso | 57 +++++++++++++++++++
 3 files changed, 125 insertions(+)
 create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-cm4.dtso
 create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc-overlay-cm7.dtso

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 8406efbbb1fd6..5689c461ede81 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -120,6 +120,10 @@ dtb-$(CONFIG_ARCH_MXC) += imx8dxp-tqma8xdp-mba8xx.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8dxp-tqma8xdps-mb-smarc-2.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-beacon-kit.dtb
 
+imx8mm-data-modul-edm-sbc-overlay-cm4-dtbs := \
+	imx8mm-data-modul-edm-sbc.dtb \
+	imx8mm-data-modul-edm-sbc-overlay-cm4.dtbo
+
 imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi-dtbs := \
 	imx8mm-data-modul-edm-sbc.dtb \
 	imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi.dtbo
@@ -157,6 +161,8 @@ imx8mm-data-modul-edm-sbc-overlay-edm-sbc-imx8mm-rev900-dtbs := \
 	imx8mm-data-modul-edm-sbc-overlay-edm-sbc-imx8mm-rev900.dtbo
 
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-data-modul-edm-sbc.dtb \
+			  imx8mm-data-modul-edm-sbc-overlay-cm4.dtb \
+			  imx8mm-data-modul-edm-sbc-overlay-cm4.dtbo \
 			  imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi.dtb \
 			  imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi.dtbo \
 			  imx8mm-data-modul-edm-sbc-overlay-edm-mod-imx8mm-lvds-g070y2-l01.dtb \
@@ -337,6 +343,10 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mp-beacon-kit.dtb
 DTC_FLAGS_imx8mp-cubox-m := -@
 dtb-$(CONFIG_ARCH_MXC) += imx8mp-cubox-m.dtb
 
+imx8mp-data-modul-edm-sbc-overlay-cm7-dtbs := \
+	imx8mp-data-modul-edm-sbc.dtb \
+	imx8mp-data-modul-edm-sbc-overlay-cm7.dtbo
+
 imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi-dtbs := \
 	imx8mp-data-modul-edm-sbc.dtb \
 	imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi.dtbo
@@ -418,6 +428,8 @@ imx8mp-data-modul-edm-sbc-overlay-edm-sbc-imx8mp-rev902-dtbs := \
 	imx8mp-data-modul-edm-sbc-overlay-edm-sbc-imx8mp-rev902.dtbo
 
 dtb-$(CONFIG_ARCH_MXC) += imx8mp-data-modul-edm-sbc.dtb \
+			  imx8mp-data-modul-edm-sbc-overlay-cm7.dtb \
+			  imx8mp-data-modul-edm-sbc-overlay-cm7.dtbo \
 			  imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi.dtb \
 			  imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-hdmi.dtbo \
 			  imx8mp-data-modul-edm-sbc-overlay-edm-mod-imx8mm-lvds-g070y2-l01.dtb \
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-cm4.dtso b/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-cm4.dtso
new file mode 100644
index 0000000000000..0bd770af2a68c
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc-overlay-cm4.dtso
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2023-2026 Marek Vasut
+ */
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/clock/imx8mm-clock.h>
+
+&{/} {
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	reserved-memory {	/* CM4 reserved memory */
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		m_core_reserved: m_core@b7000000 {
+			reg = <0 0xb7000000 0 0x1000000>;
+			no-map;
+		};
+
+		vdev0vring0: vdev0vring0@b8000000 {
+			reg = <0 0xb8000000 0 0x8000>;
+			no-map;
+		};
+
+		vdev0vring1: vdev0vring1@b8008000 {
+			reg = <0 0xb8008000 0 0x8000>;
+			no-map;
+		};
+
+		rsc_table: rsc-table@b80ff000 {
+			reg = <0 0xb80ff000 0 0x1000>;
+			no-map;
+		};
+
+		vdev0buffer: vdev0buffer@b8400000 {
+			compatible = "shared-dma-pool";
+			reg = <0 0xb8400000 0 0x100000>;
+			no-map;
+		};
+	};
+
+	imx8mm-cm4 {
+		compatible = "fsl,imx8mm-cm4";
+		clocks = <&clk IMX8MM_CLK_M4_CORE>;
+		mbox-names = "tx", "rx", "rxdb";
+		mboxes = <&mu 0 1
+			  &mu 1 1
+			  &mu 3 1>;
+		memory-region = <&vdev0buffer>, <&vdev0vring0>, <&vdev0vring1>, <&rsc_table>;
+		syscon = <&src>;
+	};
+};
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc-overlay-cm7.dtso b/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc-overlay-cm7.dtso
new file mode 100644
index 0000000000000..11d342712da61
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc-overlay-cm7.dtso
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2023-2026 Marek Vasut
+ */
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/clock/imx8mp-clock.h>
+
+&{/} {
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	reserved-memory {	/* CM7 reserved memory */
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		m_core_reserved: m_core@54000000 {
+			reg = <0 0x54000000 0 0x1000000>;
+			no-map;
+		};
+
+		vdev0vring0: vdev0vring0@55000000 {
+			reg = <0 0x55000000 0 0x8000>;
+			no-map;
+		};
+
+		vdev0vring1: vdev0vring1@55008000 {
+			reg = <0 0x55008000 0 0x8000>;
+			no-map;
+		};
+
+		rsc_table: rsc-table@550ff000 {
+			reg = <0 0x550ff000 0 0x1000>;
+			no-map;
+		};
+
+		vdev0buffer: vdev0buffer@55400000 {
+			compatible = "shared-dma-pool";
+			reg = <0 0x55400000 0 0x100000>;
+			no-map;
+		};
+	};
+
+	imx8mp-cm7 {
+		compatible = "fsl,imx8mp-cm7-mmio";
+		clocks = <&clk IMX8MP_CLK_M7_CORE>;
+		fsl,iomuxc-gpr = <&gpr>;
+		mbox-names = "tx", "rx", "rxdb";
+		mboxes = <&mu 0 1
+			  &mu 1 1
+			  &mu 3 1>;
+		memory-region = <&vdev0buffer>, <&vdev0vring0>, <&vdev0vring1>, <&rsc_table>;
+		syscon = <&src>;
+	};
+};
-- 
2.53.0