linux-kernel - Re: [PATCH v2 2/2] arm64: dts: ti: k3-am625-sk: mark MCU and WKUP watchdogs as reserved

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Message-ID: <20221103214754.5feylk5sfem2lvhf@magnetize>
Date:   Thu, 3 Nov 2022 16:47:54 -0500
From:   Nishanth Menon <nm@...com>
To:     Julien Panis <jpanis@...libre.com>, <afd@...com>
CC:     <vigneshr@...com>, <kristo@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] arm64: dts: ti: k3-am625-sk: mark MCU and WKUP
 watchdogs as reserved

On 19:14-20221103, Julien Panis wrote:
> MCU wdt is typically used by M4F.
> Wake up wdt is typically used by DM (R5) firmware.
> 
> Signed-off-by: Julien Panis <jpanis@...libre.com>
> ---
>  arch/arm64/boot/dts/ti/k3-am625-sk.dts | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am625-sk.dts b/arch/arm64/boot/dts/ti/k3-am625-sk.dts
> index 93a5f0817efc..9ade591ef563 100644
> --- a/arch/arm64/boot/dts/ti/k3-am625-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am625-sk.dts
> @@ -503,6 +503,16 @@ &main_mcan0 {
>  	status = "disabled";
>  };
>  
> +&mcu_rti0 {
> +	/* MCU RTI0 is used by M4F firmware */
> +	status = "reserved";
> +};
> +
> +&wkup_rti0 {
> +	/* WKUP RTI0 is used by DM firmware */
> +	status = "reserved";
> +};
> +

If this is the typical usage, should'nt we do this in soc.dtsi than
sprinkle this through various boards?

Andrew: ?
>  &epwm0 {
>  	status = "disabled";
>  };
> -- 
> 2.37.3
> 

-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D