linux-kernel - [PATCH v4 14/34] arm64: dts: ti: k3-j721e-beagleboneai64: Add missing cfg for TI IPC FW

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Message-ID: <20250908142826.1828676-15-b-padhi@ti.com>
Date: Mon, 8 Sep 2025 19:58:06 +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>,
        <d-gole@...com>, <b-padhi@...com>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
        Robert Nelson <robertcnelson@...il.com>
Subject: [PATCH v4 14/34] arm64: dts: ti: k3-j721e-beagleboneai64: Add missing cfg for TI IPC FW

The TI IPC Firmwares running on J721E SoCs use certain MAIN domain
timers as tick. Reserve those at board level DT to avoid remote
processor crashes. This config aligns with other J721E boards and can
be refactored out later.

Signed-off-by: Beleswar Padhi <b-padhi@...com>
---
Cc: Robert Nelson <robertcnelson@...il.com>
Requesting for review/test of this patch.

v4: Changelog:
1. None

Link to v3:
https://lore.kernel.org/all/20250905051846.1189612-14-b-padhi@ti.com/

v3: Changelog:
1. None

Link to v2:
https://lore.kernel.org/all/20250823160901.2177841-14-b-padhi@ti.com/

v2: Changelog:
1. Split [PATCH 06/33] into [PATCH v2 13/33] and [PATCH v2 22/33].
This patch only reserves the timer nodes used by rproc firmware.

Link to v1:
https://lore.kernel.org/all/20250814223839.3256046-7-b-padhi@ti.com/

 .../boot/dts/ti/k3-j721e-beagleboneai64.dts   | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j721e-beagleboneai64.dts b/arch/arm64/boot/dts/ti/k3-j721e-beagleboneai64.dts
index ac4d90e82aab..66c4614f9e42 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-beagleboneai64.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721e-beagleboneai64.dts
@@ -935,6 +935,35 @@ mbox_c71_0: mbox-c71-0 {
 	};
 };
 
+/* Timers are used by Remoteproc firmware */
+&main_timer0 {
+	status = "reserved";
+};
+
+&main_timer1 {
+	status = "reserved";
+};
+
+&main_timer2 {
+	status = "reserved";
+};
+
+&main_timer12 {
+	status = "reserved";
+};
+
+&main_timer13 {
+	status = "reserved";
+};
+
+&main_timer14 {
+	status = "reserved";
+};
+
+&main_timer15 {
+	status = "reserved";
+};
+
 &mcu_r5fss0 {
 	status = "okay";
 };
-- 
2.34.1