linux-kernel - [PATCH 06/33] arm64: dts: ti: k3-j721e-beagleboneai64: Add missing cfg for TI IPC FW

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Message-ID: <20250814223839.3256046-7-b-padhi@ti.com>
Date: Fri, 15 Aug 2025 04:08:12 +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>,
        Robert Nelson <robertcnelson@...il.com>
Subject: [PATCH 06/33] 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.

While at it, switch the MAIN domain R5F cluster into split mode to
maximize the number of R5F processors. The TI IPC firmware for the split
processors is already available public. 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.

 .../boot/dts/ti/k3-j721e-beagleboneai64.dts   | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j721e-beagleboneai64.dts b/arch/arm64/boot/dts/ti/k3-j721e-beagleboneai64.dts
index fdfd46b5b30a..c7ac2b66ee0d 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-beagleboneai64.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721e-beagleboneai64.dts
@@ -937,6 +937,35 @@ 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";
 };
@@ -956,6 +985,7 @@ &mcu_r5fss0_core1 {
 };
 
 &main_r5fss0 {
+	ti,cluster-mode = <0>;
 	status = "okay";
 };
 
@@ -974,6 +1004,7 @@ &main_r5fss0_core1 {
 };
 
 &main_r5fss1 {
+	ti,cluster-mode = <0>;
 	status = "okay";
 };
 
-- 
2.34.1