linux-kernel - Re: [PATCH 3/3] arm64: boot: dts: ti: k3-am62l3-evm: enable WKUP UART wakeup from LPM

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Message-ID: <20260105140128.bd5tiheg3k6y2tyd@bryanbrattlof.com>
Date: Mon, 5 Jan 2026 08:01:28 -0600
From: Bryan Brattlof <bb@...com>
To: Kendall Willis <k-willis@...com>
CC: Nishanth Menon <nm@...com>, 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>, "Dhruva
 Gole" <d-gole@...com>, <vishalm@...com>, <sebin.francis@...com>,
	<msp@...libre.com>, <khilman@...libre.com>, <a-kaur@...com>,
	<s-kochidanadu@...com>, <linux-arm-kernel@...ts.infradead.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] arm64: boot: dts: ti: k3-am62l3-evm: enable WKUP
 UART wakeup from LPM

On December 30, 2025 thus sayeth Kendall Willis:
> Change the status of the wkup_uart0_interconnect node to enabled. The
> target-module node sets the UART SYSC and SYSS registers to allow wakeup
> from WKUP UART in DeepSleep low power mode.
> 
> Signed-off-by: Kendall Willis <k-willis@...com>
> ---
>  arch/arm64/boot/dts/ti/k3-am62l3-evm.dts | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts b/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts
> index cae04cce337366b50928d39b0c888550b14e43d3..02b1a1c76b2ee05d49cd69d199a6aacdb1973fa0 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts
> @@ -359,3 +359,7 @@ &usb1 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&usb1_default_pins>;
>  };
> +
> +&wkup_uart0_interconnect {
> +	status = "okay";
> +};

Does the UART need to be enabled as well?

~Bryan