[PATCH v3 29/33] arm64: dts: ti: k3-am62p-ti-ipc-firmware: Refactor IPC cfg into new dtsi

Beleswar Padhi
2025-09-05T06:54:30Z

The TI K3 AM62P SoCs have multiple programmable remote processors like
R5Fs. The TI SDKs for AM62P SoCs offer sample firmwares which could be
run on these cores to demonstrate an "echo" IPC test. Those firmware
require certain memory carveouts to be reserved from system memory,
timers to be reserved, and certain mailbox configurations for interrupt
based messaging. These configurations could be different for a different
firmware.

While DT is not meant for system configurations, at least refactor these
configurations from board level DTS into a dtsi for now. This dtsi for
TI IPC firmware is board-independent and can be applied to all boards
from the same SoC Family. This gets rid of code duplication and allows
more freedom for users developing custom firmware (or no firmware) to
utilize system resources better; easily by swapping out this dtsi. To
maintain backward compatibility, the dtsi is included in all boards.

Signed-off-by: Beleswar Padhi <b-padhi@ti.com>
Tested-by: Judith Mendez <jm@ti.com>
---
v3: Changelog:
1. Carried T/B tag.
2. Changed memory node name to memory@addr.

Link to v2:
https://lore.kernel.org/all/20250823160901.2177841-30-b-padhi@ti.com/

v2: Changelog:
1. Re-ordered patch from [PATCH 17/33] to [PATCH v2 29/33].

Link to v1:
https://lore.kernel.org/all/20250814223839.3256046-18-b-padhi@ti.com/

.../boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi | 60 +++++++++++++++++++
arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi | 54 +----------------
arch/arm64/boot/dts/ti/k3-am62p5-sk.dts | 54 +----------------
3 files changed, 64 insertions(+), 104 deletions(-)
create mode 100644 arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi

diff --git a/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi
new file mode 100644
index 000000000000..d29a5dbe13ef
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/**
+ * Device Tree Source for enabling IPC using TI SDK firmware on AM62P SoCs
+ *
+ * Copyright (C) 2023-2025 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+&reserved_memory {
+ mcu_r5fss0_core0_dma_memory_region: memory@9b800000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9b800000 0x00 0x100000>;
+ no-map;
+ };
+
+ mcu_r5fss0_core0_memory_region: memory@9b900000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9b900000 0x00 0xf00000>;
+ no-map;
+ };
+};
+
+&mailbox0_cluster0 {
+ status = "okay";
+
+ mbox_r5_0: mbox-r5-0 {
+ ti,mbox-rx = <0 0 0>;
+ ti,mbox-tx = <1 0 0>;
+ };
+};
+
+&mailbox0_cluster1 {
+ status = "okay";
+
+ mbox_mcu_r5_0: mbox-mcu-r5-0 {
+ ti,mbox-rx = <0 0 0>;
+ ti,mbox-tx = <1 0 0>;
+ };
+};
+
+&wkup_r5fss0 {
+ status = "okay";
+};
+
+&wkup_r5fss0_core0 {
+ mboxes = <&mailbox0_cluster0 &mbox_r5_0>;
+ memory-region = <&wkup_r5fss0_core0_dma_memory_region>,
+ <&wkup_r5fss0_core0_memory_region>;
+ status = "okay";
+};
+
+&mcu_r5fss0 {
+ status = "okay";
+};
+
+&mcu_r5fss0_core0 {
+ mboxes = <&mailbox0_cluster1 &mbox_mcu_r5_0>;
+ memory-region = <&mcu_r5fss0_core0_dma_memory_region>,
+ <&mcu_r5fss0_core0_memory_region>;
+ status = "okay";
+};
diff --git a/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi
index 671d367b40d1..99810047614e 100644
--- a/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi
@@ -162,18 +162,6 @@ secure_ddr: optee@9e800000 {
no-map;
};

- mcu_r5fss0_core0_dma_memory_region: memory@9b800000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0x9b800000 0x00 0x100000>;
- no-map;
- };
-
- mcu_r5fss0_core0_memory_region: memory@9b900000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0x9b900000 0x00 0xf00000>;
- no-map;
- };
-
wkup_r5fss0_core0_dma_memory_region: memory@9c800000 {
compatible = "shared-dma-pool";
reg = <0x00 0x9c800000 0x00 0x100000>;
@@ -848,46 +836,6 @@ &epwm2 {
status = "disabled";
};

-&mailbox0_cluster0 {
- status = "okay";
-
- mbox_r5_0: mbox-r5-0 {
- ti,mbox-rx = <0 0 0>;
- ti,mbox-tx = <1 0 0>;
- };
-};
-
-&mailbox0_cluster1 {
- status = "okay";
-
- mbox_mcu_r5_0: mbox-mcu-r5-0 {
- ti,mbox-rx = <0 0 0>;
- ti,mbox-tx = <1 0 0>;
- };
-};
-
-&wkup_r5fss0 {
- status = "okay";
-};
-
-&wkup_r5fss0_core0 {
- mboxes = <&mailbox0_cluster0 &mbox_r5_0>;
- memory-region = <&wkup_r5fss0_core0_dma_memory_region>,
- <&wkup_r5fss0_core0_memory_region>;
- status = "okay";
-};
-
-&mcu_r5fss0 {
- status = "okay";
-};
-
-&mcu_r5fss0_core0 {
- mboxes = <&mailbox0_cluster1 &mbox_mcu_r5_0>;
- memory-region = <&mcu_r5fss0_core0_dma_memory_region>,
- <&mcu_r5fss0_core0_memory_region>;
- status = "okay";
-};
-
&main0_alert {
temperature = <95000>;
};
@@ -1466,3 +1414,5 @@ &wkup_uart0 {
uart-has-rtscts;
status = "disabled";
};
+
+#include "k3-am62p-ti-ipc-firmware.dtsi"
diff --git a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
index c5b5b00c42b9..42886ecf1521 100644
--- a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
@@ -49,18 +49,6 @@ reserved_memory: reserved-memory {
#size-cells = <2>;
ranges;

- mcu_r5fss0_core0_dma_memory_region: mcu-r5fss-dma-memory-region@9b800000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0x9b800000 0x00 0x100000>;
- no-map;
- };
-
- mcu_r5fss0_core0_memory_region: mcu-r5fss-memory-region@9b900000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0x9b900000 0x00 0xf00000>;
- no-map;
- };
-
wkup_r5fss0_core0_dma_memory_region: r5f-dma-memory@9c800000 {
compatible = "shared-dma-pool";
reg = <0x00 0x9c800000 0x00 0x100000>;
@@ -699,46 +687,6 @@ partition@3fc0000 {
};
};

-&mailbox0_cluster0 {
- status = "okay";
-
- mbox_r5_0: mbox-r5-0 {
- ti,mbox-rx = <0 0 0>;
- ti,mbox-tx = <1 0 0>;
- };
-};
-
-&mailbox0_cluster1 {
- status = "okay";
-
- mbox_mcu_r5_0: mbox-mcu-r5-0 {
- ti,mbox-rx = <0 0 0>;
- ti,mbox-tx = <1 0 0>;
- };
-};
-
-&wkup_r5fss0 {
- status = "okay";
-};
-
-&wkup_r5fss0_core0 {
- mboxes = <&mailbox0_cluster0 &mbox_r5_0>;
- memory-region = <&wkup_r5fss0_core0_dma_memory_region>,
- <&wkup_r5fss0_core0_memory_region>;
- status = "okay";
-};
-
-&mcu_r5fss0 {
- status = "okay";
-};
-
-&mcu_r5fss0_core0 {
- mboxes = <&mailbox0_cluster1 &mbox_mcu_r5_0>;
- memory-region = <&mcu_r5fss0_core0_dma_memory_region>,
- <&mcu_r5fss0_core0_memory_region>;
- status = "okay";
-};
-
&main_uart0 {
pinctrl-names = "default";
pinctrl-0 = <&main_uart0_pins_default>;
@@ -810,3 +758,5 @@ &epwm1 {
pinctrl-0 = <&main_epwm1_pins_default>;
status = "okay";
};
+
+#include "k3-am62p-ti-ipc-firmware.dtsi"
--
2.34.1