[PATCH v7 06/11] arm64: dts: ti: k3-am62a7-sk: Enable IPC with remote processors

Judith Mendez
2025-04-15T15:32:04Z

From: Devarsh Thakkar <devarsht@ti.com>

For each remote proc, reserve memory for IPC and bind the mailbox
assignments. Two memory regions are reserved for each remote processor.
The first region of 1MB of memory is used for Vring shared buffers
and the second region is used as external memory to the remote processor
for the resource table and for tracebuffer allocations.

Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
Signed-off-by: Hari Nagalla <hnagalla@ti.com>
Signed-off-by: Judith Mendez <jm@ti.com>
Acked-by: Andrew Davis <afd@ti.com>
Reviewed-by: Beleswar Padhi <b-padhi@ti.com>
Reviewed-by: Jai Luthra <jai.luthra@ideasonboard.com>
---
arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 96 +++++++++++++++++++++++--
1 file changed, 90 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
index 1c9d95696c839..7d817b447c1d0 100644
--- a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
@@ -52,6 +52,42 @@ linux,cma {
linux,cma-default;
};

+ c7x_0_dma_memory_region: c7x-dma-memory@99800000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x99800000 0x00 0x100000>;
+ no-map;
+ };
+
+ c7x_0_memory_region: c7x-memory@99900000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x99900000 0x00 0xf00000>;
+ no-map;
+ };
+
+ mcu_r5fss0_core0_dma_memory_region: r5f-dma-memory@9b800000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9b800000 0x00 0x100000>;
+ no-map;
+ };
+
+ mcu_r5fss0_core0_memory_region: r5f-dma-memory@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>;
+ no-map;
+ };
+
+ wkup_r5fss0_core0_memory_region: r5f-dma-memory@9c900000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9c900000 0x00 0xf00000>;
+ no-map;
+ };
+
secure_tfa_ddr: tfa@9e780000 {
reg = <0x00 0x9e780000 0x00 0x80000>;
alignment = <0x1000>;
@@ -63,12 +99,6 @@ secure_ddr: optee@9e800000 {
alignment = <0x1000>;
no-map;
};
-
- wkup_r5fss0_core0_memory_region: r5f-dma-memory@9c900000 {
- compatible = "shared-dma-pool";
- reg = <0x00 0x9c900000 0x00 0x01e00000>;
- no-map;
- };
};

opp-table {
@@ -741,3 +771,57 @@ dpi1_out: endpoint {
};
};
};
+
+&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_c7x_0: mbox-c7x-0 {
+ ti,mbox-rx = <0 0 0>;
+ ti,mbox-tx = <1 0 0>;
+ };
+};
+
+&mailbox0_cluster2 {
+ 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>;
+};
+
+&mcu_r5fss0 {
+ status = "okay";
+};
+
+&mcu_r5fss0_core0 {
+ mboxes = <&mailbox0_cluster2>, <&mbox_mcu_r5_0>;
+ memory-region = <&mcu_r5fss0_core0_dma_memory_region>,
+ <&mcu_r5fss0_core0_memory_region>;
+};
+
+&c7x_0 {
+ mboxes = <&mailbox0_cluster1>, <&mbox_c7x_0>;
+ memory-region = <&c7x_0_dma_memory_region>,
+ <&c7x_0_memory_region>;
+ status = "okay";
+};
--
2.49.0