linux-kernel - Re: [PATCH v2 5/5] arm64: dts: ti: k3-j722s: Change timer nodes status to reserved

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Message-ID: <6216b2b4-f745-4183-8454-374d77a15379@ti.com>
Date: Wed, 14 Aug 2024 21:26:26 +0530
From: "Kumar, Udit" <u-kumar1@...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: <tony@...mide.com>, <afd@...com>, <hnagalla@...com>,
        <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <u-kumar1@...com>
Subject: Re: [PATCH v2 5/5] arm64: dts: ti: k3-j722s: Change timer nodes
 status to reserved


On 8/14/2024 4:11 PM, Beleswar Padhi wrote:
> The remoteproc firmware like of R5F and DSPs in the MAIN voltage domain
> use timers. Therefore, change the status of the timer nodes to
> "reserved" to avoid any clash. Usage is described as below:
>
> 	+===================+=============+
> 	|  Remoteproc Node  | Timer Node  |
> 	+===================+=============+
> 	| main_r5fss0_core0 | main_timer0 |
> 	+-------------------+-------------+
> 	| c7x_0             | main_timer1 |
> 	+-------------------+-------------+
> 	| c7x_1             | main_timer2 |
> 	+-------------------+-------------+
>
> This change is already incorporated for timer nodes in the MCU voltage
> domain.
>
> Fixes: 3308a31c507c ("arm64: dts: ti: k3-am62: Add general purpose timers for am62")

Please check Fixes tag once.

AFAIR, J722S uses am62p not am62


> Signed-off-by: Beleswar Padhi <b-padhi@...com>
> ---
>   arch/arm64/boot/dts/ti/k3-j722s-evm.dts | 13 +++++++++++++
>   1 file changed, 13 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-j722s-evm.dts b/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
> index dd3b5f7039d7..e03beb0b5aad 100644
> --- a/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
> +++ b/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
> @@ -566,3 +566,16 @@ &mcasp1 {
>   	       0 0 0 0
>   	>;
>   };
> +
> +/* Timers are used by Remoteproc firmware */
> +&main_timer0 {
> +	status = "reserved";
> +};
> +
> +&main_timer1 {
> +	status = "reserved";
> +};
> +
> +&main_timer2 {
> +	status = "reserved";
> +};