linux-kernel - [PATCH 2/3] arm64: dts: ti: k3-j722s-evm: Enable Mailbox clusters

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Date: Fri, 7 Jun 2024 14:34:32 +0530
From: Beleswar Padhi <b-padhi@...com>
To: <nm@...com>, <vigneshr@...com>
CC: <kristo@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <vaishnav.a@...com>, <j-choudhary@...com>, <u-kumar1@...com>
Subject: [PATCH 2/3] arm64: dts: ti: k3-j722s-evm: Enable Mailbox clusters

The K3 J722S SoCs have one single-core Arm Cortex-R5F processor in each
of the WAKEUP, MCU and MAIN voltage domain, and two C71x DSP subsystems
in MAIN voltage domain.

The Inter-Processor communication between the main A72 cores and these
R5F and DSP remote cores is achieved through shared memory and
Mailboxes. Thus, enable the Mailbox clusters required for communication.

Signed-off-by: Beleswar Padhi <b-padhi@...com>
---
 arch/arm64/boot/dts/ti/k3-j722s-evm.dts | 37 +++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j722s-evm.dts b/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
index bf3c246d13d1f..a51925deb43b8 100644
--- a/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
@@ -384,3 +384,40 @@ &sdhci1 {
 	status = "okay";
 	bootph-all;
 };
+
+&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>;
+	};
+};
+
+&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>;
+	};
+};
-- 
2.34.1