[PATCH v3 28/33] arm64: dts: ti: k3-j722s-ti-ipc-firmware: Refactor IPC cfg into new dtsi

Beleswar Padhi
2025-09-05T06:51:45Z

The TI K3 J722S SoCs have multiple programmable remote processors like
R5F, C7x etc. The TI SDKs for J722S 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>
---
v3: Changelog:
1. None

Link to v2:
https://lore.kernel.org/all/20250823160901.2177841-29-b-padhi@ti.com/

v2: Changelog:
1. Re-ordered patch from [PATCH 14/33] to [PATCH v2 28/33].

Link to v1:
https://lore.kernel.org/all/20250814223839.3256046-15-b-padhi@ti.com/

.../arm64/boot/dts/ti/k3-am67a-beagley-ai.dts | 155 +----------------
arch/arm64/boot/dts/ti/k3-j722s-evm.dts | 157 +----------------
.../boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi | 163 ++++++++++++++++++
3 files changed, 166 insertions(+), 309 deletions(-)
create mode 100644 arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi

diff --git a/arch/arm64/boot/dts/ti/k3-am67a-beagley-ai.dts b/arch/arm64/boot/dts/ti/k3-am67a-beagley-ai.dts
index b329e4cb0c37..e1eaeb0015a2 100644
--- a/arch/arm64/boot/dts/ti/k3-am67a-beagley-ai.dts
+++ b/arch/arm64/boot/dts/ti/k3-am67a-beagley-ai.dts
@@ -61,60 +61,6 @@ wkup_r5fss0_core0_memory_region: r5f-memory@a0100000 {
reg = <0x00 0xa0100000 0x00 0xf00000>;
no-map;
};
-
- mcu_r5fss0_core0_dma_memory_region: mcu-r5fss-dma-memory-region@a1000000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa1000000 0x00 0x100000>;
- no-map;
- };
-
- mcu_r5fss0_core0_memory_region: mcu-r5fss-memory-region@a1100000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa1100000 0x00 0xf00000>;
- no-map;
- };
-
- main_r5fss0_core0_dma_memory_region: main-r5fss-dma-memory-region@a2000000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa2000000 0x00 0x100000>;
- no-map;
- };
-
- main_r5fss0_core0_memory_region: main-r5fss-memory-region@a2100000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa2100000 0x00 0xf00000>;
- no-map;
- };
-
- c7x_0_dma_memory_region: c7x-dma-memory@a3000000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa3000000 0x00 0x100000>;
- no-map;
- };
-
- c7x_0_memory_region: c7x-memory@a3100000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa3100000 0x00 0xf00000>;
- no-map;
- };
-
- c7x_1_dma_memory_region: c7x-dma-memory@a4000000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa4000000 0x00 0x100000>;
- no-map;
- };
-
- c7x_1_memory_region: c7x-memory@a4100000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa4100000 0x00 0xf00000>;
- no-map;
- };
-
- rtos_ipc_memory_region: ipc-memories@a5000000 {
- reg = <0x00 0xa5000000 0x00 0x1c00000>;
- alignment = <0x1000>;
- no-map;
- };
};

vsys_5v0: regulator-1 {
@@ -453,103 +399,4 @@ &sdhci1 {
status = "okay";
};

-&mailbox0_cluster0 {
- status = "okay";
-
- mbox_wkup_r5_0: mbox-wkup-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>;
- };
-};
-
-&mailbox0_cluster2 {
- status = "okay";
-
- mbox_c7x_0: mbox-c7x-0 {
- ti,mbox-rx = <0 0 0>;
- ti,mbox-tx = <1 0 0>;
- };
-};
-
-&mailbox0_cluster3 {
- status = "okay";
-
- mbox_main_r5_0: mbox-main-r5-0 {
- ti,mbox-rx = <0 0 0>;
- ti,mbox-tx = <1 0 0>;
- };
-
- mbox_c7x_1: mbox-c7x-1 {
- ti,mbox-rx = <2 0 0>;
- ti,mbox-tx = <3 0 0>;
- };
-};
-
-/* Timers are used by Remoteproc firmware */
-&main_timer0 {
- status = "reserved";
-};
-
-&main_timer1 {
- status = "reserved";
-};
-
-&main_timer2 {
- status = "reserved";
-};
-
-&wkup_r5fss0 {
- status = "okay";
-};
-
-&wkup_r5fss0_core0 {
- mboxes = <&mailbox0_cluster0 &mbox_wkup_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_r5fss0 {
- status = "okay";
-};
-
-&main_r5fss0_core0 {
- mboxes = <&mailbox0_cluster3 &mbox_main_r5_0>;
- memory-region = <&main_r5fss0_core0_dma_memory_region>,
- <&main_r5fss0_core0_memory_region>;
- status = "okay";
-};
-
-&c7x_0 {
- mboxes = <&mailbox0_cluster2 &mbox_c7x_0>;
- memory-region = <&c7x_0_dma_memory_region>,
- <&c7x_0_memory_region>;
- status = "okay";
-};
-
-&c7x_1 {
- mboxes = <&mailbox0_cluster3 &mbox_c7x_1>;
- memory-region = <&c7x_1_dma_memory_region>,
- <&c7x_1_memory_region>;
- status = "okay";
-};
+#include "k3-j722s-ti-ipc-firmware.dtsi"
diff --git a/arch/arm64/boot/dts/ti/k3-j722s-evm.dts b/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
index 2b9e007432a9..7ff738b40706 100644
--- a/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
@@ -63,60 +63,6 @@ wkup_r5fss0_core0_memory_region: r5f-memory@a0100000 {
reg = <0x00 0xa0100000 0x00 0xf00000>;
no-map;
};
-
- mcu_r5fss0_core0_dma_memory_region: mcu-r5fss-dma-memory-region@a1000000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa1000000 0x00 0x100000>;
- no-map;
- };
-
- mcu_r5fss0_core0_memory_region: mcu-r5fss-memory-region@a1100000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa1100000 0x00 0xf00000>;
- no-map;
- };
-
- main_r5fss0_core0_dma_memory_region: main-r5fss-dma-memory-region@a2000000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa2000000 0x00 0x100000>;
- no-map;
- };
-
- main_r5fss0_core0_memory_region: main-r5fss-memory-region@a2100000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa2100000 0x00 0xf00000>;
- no-map;
- };
-
- c7x_0_dma_memory_region: c7x-dma-memory@a3000000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa3000000 0x00 0x100000>;
- no-map;
- };
-
- c7x_0_memory_region: c7x-memory@a3100000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa3100000 0x00 0xf00000>;
- no-map;
- };
-
- c7x_1_dma_memory_region: c7x-dma-memory@a4000000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa4000000 0x00 0x100000>;
- no-map;
- };
-
- c7x_1_memory_region: c7x-memory@a4100000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0xa4100000 0x00 0xf00000>;
- no-map;
- };
-
- rtos_ipc_memory_region: ipc-memories@a5000000 {
- reg = <0x00 0xa5000000 0x00 0x1c00000>;
- alignment = <0x1000>;
- no-map;
- };
};

vmain_pd: regulator-0 {
@@ -788,107 +734,6 @@ &sdhci1 {
bootph-all;
};

-&mailbox0_cluster0 {
- status = "okay";
-
- mbox_wkup_r5_0: mbox-wkup-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>;
- };
-};
-
-&mailbox0_cluster2 {
- status = "okay";
-
- mbox_c7x_0: mbox-c7x-0 {
- ti,mbox-rx = <0 0 0>;
- ti,mbox-tx = <1 0 0>;
- };
-};
-
-&mailbox0_cluster3 {
- status = "okay";
-
- mbox_main_r5_0: mbox-main-r5-0 {
- ti,mbox-rx = <0 0 0>;
- ti,mbox-tx = <1 0 0>;
- };
-
- mbox_c7x_1: mbox-c7x-1 {
- ti,mbox-rx = <2 0 0>;
- ti,mbox-tx = <3 0 0>;
- };
-};
-
-/* Timers are used by Remoteproc firmware */
-&main_timer0 {
- status = "reserved";
-};
-
-&main_timer1 {
- status = "reserved";
-};
-
-&main_timer2 {
- status = "reserved";
-};
-
-&wkup_r5fss0 {
- status = "okay";
-};
-
-&wkup_r5fss0_core0 {
- mboxes = <&mailbox0_cluster0 &mbox_wkup_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_r5fss0 {
- status = "okay";
-};
-
-&main_r5fss0_core0 {
- mboxes = <&mailbox0_cluster3 &mbox_main_r5_0>;
- memory-region = <&main_r5fss0_core0_dma_memory_region>,
- <&main_r5fss0_core0_memory_region>;
- status = "okay";
-};
-
-&c7x_0 {
- mboxes = <&mailbox0_cluster2 &mbox_c7x_0>;
- memory-region = <&c7x_0_dma_memory_region>,
- <&c7x_0_memory_region>;
- status = "okay";
-};
-
-&c7x_1 {
- mboxes = <&mailbox0_cluster3 &mbox_c7x_1>;
- memory-region = <&c7x_1_dma_memory_region>,
- <&c7x_1_memory_region>;
- status = "okay";
-};
-
&serdes_ln_ctrl {
idle-states = <J722S_SERDES0_LANE0_USB>,
<J722S_SERDES1_LANE0_PCIE0_LANE0>;
@@ -999,3 +844,5 @@ &mcu_i2c0 {
clock-frequency = <400000>;
status = "okay";
};
+
+#include "k3-j722s-ti-ipc-firmware.dtsi"
diff --git a/arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi
new file mode 100644
index 000000000000..442d78cf450a
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi
@@ -0,0 +1,163 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/**
+ * Device Tree Source for enabling IPC using TI SDK firmware on J722S SoCs
+ *
+ * Copyright (C) 2024-2025 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+&reserved_memory {
+ mcu_r5fss0_core0_dma_memory_region: mcu-r5fss-dma-memory-region@a1000000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0xa1000000 0x00 0x100000>;
+ no-map;
+ };
+
+ mcu_r5fss0_core0_memory_region: mcu-r5fss-memory-region@a1100000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0xa1100000 0x00 0xf00000>;
+ no-map;
+ };
+
+ main_r5fss0_core0_dma_memory_region: main-r5fss-dma-memory-region@a2000000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0xa2000000 0x00 0x100000>;
+ no-map;
+ };
+
+ main_r5fss0_core0_memory_region: main-r5fss-memory-region@a2100000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0xa2100000 0x00 0xf00000>;
+ no-map;
+ };
+
+ c7x_0_dma_memory_region: c7x-dma-memory@a3000000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0xa3000000 0x00 0x100000>;
+ no-map;
+ };
+
+ c7x_0_memory_region: c7x-memory@a3100000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0xa3100000 0x00 0xf00000>;
+ no-map;
+ };
+
+ c7x_1_dma_memory_region: c7x-dma-memory@a4000000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0xa4000000 0x00 0x100000>;
+ no-map;
+ };
+
+ c7x_1_memory_region: c7x-memory@a4100000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0xa4100000 0x00 0xf00000>;
+ no-map;
+ };
+
+ rtos_ipc_memory_region: ipc-memories@a5000000 {
+ reg = <0x00 0xa5000000 0x00 0x1c00000>;
+ alignment = <0x1000>;
+ no-map;
+ };
+};
+
+&mailbox0_cluster0 {
+ status = "okay";
+
+ mbox_wkup_r5_0: mbox-wkup-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>;
+ };
+};
+
+&mailbox0_cluster2 {
+ status = "okay";
+
+ mbox_c7x_0: mbox-c7x-0 {
+ ti,mbox-rx = <0 0 0>;
+ ti,mbox-tx = <1 0 0>;
+ };
+};
+
+&mailbox0_cluster3 {
+ status = "okay";
+
+ mbox_main_r5_0: mbox-main-r5-0 {
+ ti,mbox-rx = <0 0 0>;
+ ti,mbox-tx = <1 0 0>;
+ };
+
+ mbox_c7x_1: mbox-c7x-1 {
+ ti,mbox-rx = <2 0 0>;
+ ti,mbox-tx = <3 0 0>;
+ };
+};
+
+/* Timers are used by Remoteproc firmware */
+&main_timer0 {
+ status = "reserved";
+};
+
+&main_timer1 {
+ status = "reserved";
+};
+
+&main_timer2 {
+ status = "reserved";
+};
+
+&wkup_r5fss0 {
+ status = "okay";
+};
+
+&wkup_r5fss0_core0 {
+ mboxes = <&mailbox0_cluster0 &mbox_wkup_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_r5fss0 {
+ status = "okay";
+};
+
+&main_r5fss0_core0 {
+ mboxes = <&mailbox0_cluster3 &mbox_main_r5_0>;
+ memory-region = <&main_r5fss0_core0_dma_memory_region>,
+ <&main_r5fss0_core0_memory_region>;
+ status = "okay";
+};
+
+&c7x_0 {
+ mboxes = <&mailbox0_cluster2 &mbox_c7x_0>;
+ memory-region = <&c7x_0_dma_memory_region>,
+ <&c7x_0_memory_region>;
+ status = "okay";
+};
+
+&c7x_1 {
+ mboxes = <&mailbox0_cluster3 &mbox_c7x_1>;
+ memory-region = <&c7x_1_dma_memory_region>,
+ <&c7x_1_memory_region>;
+ status = "okay";
+};
--
2.34.1