linux-kernel - [PATCH 20/33] arm64: dts: ti: k3-am62: Enable Mailbox nodes at the board level

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Message-ID: <20250814223839.3256046-21-b-padhi@ti.com>
Date: Fri, 15 Aug 2025 04:08:26 +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>
Subject: [PATCH 20/33] arm64: dts: ti: k3-am62: Enable Mailbox nodes at the board level

Mailbox nodes defined in the top-level AM62x SoC dtsi files are
incomplete and may not be functional unless they are extended with a
chosen interrupt and connection to a remote processor.

As the remote processors depend on memory nodes which are only known at
the board integration level, these nodes should only be enabled when
provided with the above information.

Disable the Mailbox nodes in the dtsi files and only enable the ones
that are actually used on a given board.

Signed-off-by: Beleswar Padhi <b-padhi@...com>
---
 arch/arm64/boot/dts/ti/k3-am62-main.dtsi         | 1 +
 arch/arm64/boot/dts/ti/k3-am62-pocketbeagle2.dts | 1 +
 arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi       | 1 +
 3 files changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
index 029380dc1a35..40fb3c9e674c 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
@@ -808,6 +808,7 @@ mailbox0_cluster0: mailbox@...00000 {
 		#mbox-cells = <1>;
 		ti,mbox-num-users = <4>;
 		ti,mbox-num-fifos = <16>;
+		status = "disabled";
 	};
 
 	ecap0: pwm@...00000 {
diff --git a/arch/arm64/boot/dts/ti/k3-am62-pocketbeagle2.dts b/arch/arm64/boot/dts/ti/k3-am62-pocketbeagle2.dts
index df2e1b0e74a1..2140e0cdec85 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-pocketbeagle2.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62-pocketbeagle2.dts
@@ -299,6 +299,7 @@ &epwm2 {
 };
 
 &mailbox0_cluster0 {
+	status = "okay";
 	mbox_m4_0: mbox-m4-0 {
 		ti,mbox-rx = <0 0 0>;
 		ti,mbox-tx = <1 0 0>;
diff --git a/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi b/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
index fba6f5c8d099..1c44d17281dd 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
@@ -1335,6 +1335,7 @@ &main_i2c3 {
 };
 
 &mailbox0_cluster0 {
+	status = "okay";
 	mbox_m4_0: mbox-m4-0 {
 		ti,mbox-rx = <0 0 0>;
 		ti,mbox-tx = <1 0 0>;
-- 
2.34.1