linux-kernel - Re: [PATCH 1/3] arm64: dts: ti: k3-am62x-sk-common: Add serial aliases

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Message-ID: <20250204035329.jzss2ar3t5arpgwt@reoccur>
Date: Mon, 3 Feb 2025 21:53:29 -0600
From: Nishanth Menon <nm@...com>
To: Markus Schneider-Pargmann <msp@...libre.com>
CC: Vignesh Raghavendra <vigneshr@...com>, Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, Vishal Mahaveer <vishalm@...com>,
        Kevin
 Hilman <khilman@...libre.com>, Dhruva Gole <d-gole@...com>,
        Sebin Francis
	<sebin.francis@...com>,
        <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] arm64: dts: ti: k3-am62x-sk-common: Add serial
 aliases

On 10:34-20250203, Markus Schneider-Pargmann wrote:
> Add aliases for mcu_uart0 and wkup_uart0.
> 
> Signed-off-by: Markus Schneider-Pargmann <msp@...libre.com>
> ---
>  arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
> index 2f129e8cd5b9f127b1d1baab17be868938fae013..d52cb2a5a589a8e5eb325fd90324d57ec1e3783b 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
> @@ -12,6 +12,8 @@
>  
>  / {
>  	aliases {
> +		serial0 = &wkup_uart0;
> +		serial1 = &mcu_uart0;
>  		serial2 = &main_uart0;
>  		mmc0 = &sdhci0;
>  		mmc1 = &sdhci1;
> 
> -- 
> 2.47.2
> 
Are'nt these reserved nodes for DM/TIFS and MCU? What purpose does it
serve for us to have an alias in Linux?
-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D