linux-kernel - [PATCH v6 08/11] arm64: dts: ti: k3-am62x-sk-common: Enable IPC with remote processors

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Message-ID: <20250405001518.1315273-9-jm@ti.com>
Date: Fri, 4 Apr 2025 19:15:15 -0500
From: Judith Mendez <jm@...com>
To: Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>
CC: Tero Kristo <kristo@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof
 Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Hari Nagalla <hnagalla@...com>,
        Beleswar
 Padhi <b-padhi@...com>, Andrew Davis <afd@...com>,
        Markus Schneider-Pargmann
	<msp@...libre.com>
Subject: [PATCH v6 08/11] arm64: dts: ti: k3-am62x-sk-common: Enable IPC with remote processors

From: Hari Nagalla <hnagalla@...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@...com>
Signed-off-by: Hari Nagalla <hnagalla@...com>
Signed-off-by: Judith Mendez <jm@...com>
---
 .../arm64/boot/dts/ti/k3-am62x-sk-common.dtsi | 34 ++++++++++++++++---
 1 file changed, 29 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
index d52cb2a5a589a..364b2ba6af958 100644
--- a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
@@ -70,6 +70,18 @@ mcu_m4fss_memory_region: m4f-memory@...00000 {
 			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;
+		};
+
 		secure_tfa_ddr: tfa@...80000 {
 			reg = <0x00 0x9e780000 0x00 0x80000>;
 			alignment = <0x1000>;
@@ -82,11 +94,6 @@ secure_ddr: optee@...00000 {
 			no-map;
 		};
 
-		wkup_r5fss0_core0_dma_memory_region: r5f-dma-memory@...00000 {
-			compatible = "shared-dma-pool";
-			reg = <0x00 0x9db00000 0x00 0xc00000>;
-			no-map;
-		};
 	};
 
 	leds {
@@ -476,10 +483,17 @@ cpsw3g_phy0: ethernet-phy@0 {
 };
 
 &mailbox0_cluster0 {
+	status = "okay";
+
 	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 {
@@ -489,6 +503,16 @@ &mcu_m4fss {
 	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>;
+};
+
 &usbss0 {
 	bootph-all;
 	status = "okay";
-- 
2.49.0