linux-kernel - [PATCH v2 10/33] arm64: dts: ti: k3-am62: Enable Mailbox nodes at the board level

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Message-ID: <20250823160901.2177841-11-b-padhi@ti.com>
Date: Sat, 23 Aug 2025 21:38:38 +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 v2 10/33] 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>
---
v2: Changelog:
1. Re-ordered patch from [PATCH 20/33] to [PATCH v2 10/33].
2. Added new-line before sub-nodes in mailboxes.

Link to v1:
https://lore.kernel.org/all/20250814223839.3256046-21-b-padhi@ti.com/

 arch/arm64/boot/dts/ti/k3-am62-main.dtsi         | 1 +
 arch/arm64/boot/dts/ti/k3-am62-pocketbeagle2.dts | 2 ++
 arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi       | 2 ++
 3 files changed, 5 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 2e4cf65ee323..2eee5f638e0f 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-pocketbeagle2.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62-pocketbeagle2.dts
@@ -293,6 +293,8 @@ &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 bc2289d74774..bbf2d630b305 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
@@ -1317,6 +1317,8 @@ &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