[PATCH 31/33] arm64: dts: ti: k3-am65: Enable remote processors at board level

Beleswar Padhi b-padhi at ti.com
Thu Aug 14 15:38:37 PDT 2025


Remote Processors defined in top-level AM65x SoC dtsi files are
incomplete without the memory carveouts and mailbox assignments which
are only known at board integration level.

Therefore, disable the remote processors at SoC level and enable them at
board level where above information is available.

Signed-off-by: Beleswar Padhi <b-padhi at ti.com>
---
 arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi | 6 ++++++
 arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi            | 3 +++
 arch/arm64/boot/dts/ti/k3-am654-base-board.dts     | 6 ++++++
 3 files changed, 15 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
index b86ee00d48f7..6cd499ea53e7 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
@@ -602,16 +602,22 @@ mbox_mcu_r5fss0_core1: mbox-mcu-r5fss0-core1 {
 	};
 };
 
+&mcu_r5fss0 {
+	status = "okay";
+};
+
 &mcu_r5fss0_core0 {
 	memory-region = <&mcu_r5fss0_core0_dma_memory_region>,
 			<&mcu_r5fss0_core0_memory_region>;
 	mboxes = <&mailbox0_cluster0 &mbox_mcu_r5fss0_core0>;
+	status = "okay";
 };
 
 &mcu_r5fss0_core1 {
 	memory-region = <&mcu_r5fss0_core1_dma_memory_region>,
 			<&mcu_r5fss0_core1_memory_region>;
 	mboxes = <&mailbox0_cluster1 &mbox_mcu_r5fss0_core1>;
+	status = "okay";
 };
 
 &mcu_rti1 {
diff --git a/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
index 7cf1f646500a..f6d9a5779918 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
@@ -408,6 +408,7 @@ mcu_r5fss0: r5fss at 41000000 {
 		ranges = <0x41000000 0x00 0x41000000 0x20000>,
 			 <0x41400000 0x00 0x41400000 0x20000>;
 		power-domains = <&k3_pds 129 TI_SCI_PD_EXCLUSIVE>;
+		status = "disabled";
 
 		mcu_r5fss0_core0: r5f at 41000000 {
 			compatible = "ti,am654-r5f";
@@ -422,6 +423,7 @@ mcu_r5fss0_core0: r5f at 41000000 {
 			ti,atcm-enable = <1>;
 			ti,btcm-enable = <1>;
 			ti,loczrama = <1>;
+			status = "disabled";
 		};
 
 		mcu_r5fss0_core1: r5f at 41400000 {
@@ -437,6 +439,7 @@ mcu_r5fss0_core1: r5f at 41400000 {
 			ti,atcm-enable = <1>;
 			ti,btcm-enable = <1>;
 			ti,loczrama = <1>;
+			status = "disabled";
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/ti/k3-am654-base-board.dts b/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
index d48171212ac9..e532ea0a22b2 100644
--- a/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
@@ -541,16 +541,22 @@ mbox_mcu_r5fss0_core1: mbox-mcu-r5fss0-core1 {
 	};
 };
 
+&mcu_r5fss0 {
+	status = "okay";
+};
+
 &mcu_r5fss0_core0 {
 	memory-region = <&mcu_r5fss0_core0_dma_memory_region>,
 			<&mcu_r5fss0_core0_memory_region>;
 	mboxes = <&mailbox0_cluster0 &mbox_mcu_r5fss0_core0>;
+	status = "okay";
 };
 
 &mcu_r5fss0_core1 {
 	memory-region = <&mcu_r5fss0_core1_dma_memory_region>,
 			<&mcu_r5fss0_core1_memory_region>;
 	mboxes = <&mailbox0_cluster1 &mbox_mcu_r5fss0_core1>;
+	status = "okay";
 };
 
 &ospi0 {
-- 
2.34.1




More information about the linux-arm-kernel mailing list