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

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Message-ID: <cb663648-768d-49ad-bd33-c7e58ff58213@ti.com>
Date: Fri, 15 Aug 2025 10:42:29 -0500
From: Andrew Davis <afd@...com>
To: Beleswar Padhi <b-padhi@...com>, <nm@...com>, <vigneshr@...com>,
        <kristo@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>
CC: <u-kumar1@...com>, <hnagalla@...com>, <jm@...com>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Robert Nelson
	<robertcnelson@...il.com>
Subject: Re: [PATCH 06/33] arm64: dts: ti: k3-j721e-beagleboneai64: Add
 missing cfg for TI IPC FW

On 8/14/25 5:38 PM, Beleswar Padhi wrote:
> 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.
> 

All these "missing cfg" patches should then go together next in this series.

> 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.
> 

This is an unrelated change and not as trivial as it looks. Factor this part
out and put it later in the series so we can discuss it separately.

Andrew

> 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";
>   };
>