linux-kernel - [PATCH 18/33] arm64: dts: ti: k3-am62-verdin: Add missing cfg for TI IPC Firmware

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Message-ID: <20250814223839.3256046-19-b-padhi@ti.com>
Date: Fri, 15 Aug 2025 04:08:24 +0530
From: Beleswar Padhi <b-padhi@...com>
To: <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>
CC: <afd@...com>, <u-kumar1@...com>, <hnagalla@...com>, <jm@...com>,
        <b-padhi@...com>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
        Francesco Dolcini <francesco.dolcini@...adex.com>,
        Hiago De Franco
	<hiago.franco@...adex.com>,
        Jo_o Paulo Gon_alves
	<joao.goncalves@...adex.com>,
        Stefan Eichenberger
	<stefan.eichenberger@...adex.com>,
        Max Krummenacher
	<max.krummenacher@...adex.com>,
        Andrejs Cainikovs
	<andrejs.cainikovs@...adex.com>
Subject: [PATCH 18/33] arm64: dts: ti: k3-am62-verdin: Add missing cfg for TI IPC Firmware

The wkup_r5fss0_core0_memory_region is used to store the text/data
sections of the Device Manager (DM) firmware itself and is necessary for
platform boot. Whereas the wkup_r5fss0_core0_dma_memory_region is used
for allocating the Virtio buffers needed for IPC with the DM core which
could be optional. The labels were incorrectly used in the
k3-am62-verdin.dtsi file. Correct the firmware memory region label.

Currently, only mailbox node is enabled with FIFO assignment for a
single M4F remote core. However, there are no users of the enabled
mailboxes. Add the missing carveouts for WKUP R5F and MCU M4F remote
processors, and enable those by associating to the above carveout and
mailboxes. This config aligns with other AM62 boards and can be
refactored out later.

Signed-off-by: Beleswar Padhi <b-padhi@...com>
---
Cc: Francesco Dolcini <francesco.dolcini@...adex.com>
Cc: Hiago De Franco <hiago.franco@...adex.com>
Cc: Jo_o Paulo Gon_alves <joao.goncalves@...adex.com>
Cc: Stefan Eichenberger <stefan.eichenberger@...adex.com>
Cc: Max Krummenacher <max.krummenacher@...adex.com>
Cc: Andrejs Cainikovs <andrejs.cainikovs@...adex.com>
Requesting for review/test of this patch

 arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi | 43 +++++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi b/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
index 4e9a8921c95d..fba6f5c8d099 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
@@ -206,7 +206,25 @@ secure_ddr: optee@...00000 {
 			no-map;
 		};
 
-		wkup_r5fss0_core0_dma_memory_region: r5f-dma-memory@...00000 {
+		mcu_m4fss_dma_memory_region: m4f-dma-memory@...00000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0x9cb00000 0x00 0x100000>;
+			no-map;
+		};
+
+		mcu_m4fss_memory_region: m4f-memory@...00000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0x9cc00000 0x00 0xe00000>;
+			no-map;
+		};
+
+		wkup_r5fss0_core0_dma_memory_region: r5f-dma-memory@...00000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0x9da00000 0x00 0x100000>;
+			no-map;
+		};
+
+		wkup_r5fss0_core0_memory_region: r5f-memory@...00000 {
 			compatible = "shared-dma-pool";
 			reg = <0x00 0x9db00000 0x00 0xc00000>;
 			no-map;
@@ -1321,6 +1339,29 @@ mbox_m4_0: mbox-m4-0 {
 		ti,mbox-rx = <0 0 0>;
 		ti,mbox-tx = <1 0 0>;
 	};
+
+	mbox_r5_0: mbox-r5-0 {
+		ti,mbox-rx = <2 0 0>;
+		ti,mbox-tx = <3 0 0>;
+	};
+};
+
+&mcu_m4fss {
+	mboxes = <&mailbox0_cluster0 &mbox_m4_0>;
+	memory-region = <&mcu_m4fss_dma_memory_region>,
+			<&mcu_m4fss_memory_region>;
+	status = "okay";
+};
+
+&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";
 };
 
 /* Verdin CAN_1 */
-- 
2.34.1