linux-kernel - Re: [PATCH 7/7] arm64: dts: apple: t8103: Add UART2

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Date:   Tue, 5 Oct 2021 22:26:33 +0200 (CEST)
From:   Mark Kettenis <mark.kettenis@...all.nl>
To:     Hector Martin <marcan@...can.st>
Cc:     linux-arm-kernel@...ts.infradead.org, marcan@...can.st,
        maz@...nel.org, robh+dt@...nel.org, arnd@...nel.org,
        linus.walleij@...aro.org, alyssa@...enzweig.io, krzk@...nel.org,
        gregkh@...uxfoundation.org, p.zabel@...gutronix.de,
        rafael@...nel.org, devicetree@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-samsung-soc@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH 7/7] arm64: dts: apple: t8103: Add UART2

> From: Hector Martin <marcan@...can.st>
> Date: Wed,  6 Oct 2021 00:59:23 +0900
> 
> This UART is connected to the debug port of the WLAN module. It is
> mostly useless, but makes for a good test case for runtime-pm without
> having to unbind the console from the main system UART.
> 
> Signed-off-by: Hector Martin <marcan@...can.st>
> ---
>  arch/arm64/boot/dts/apple/t8103-j274.dts |  5 +++++
>  arch/arm64/boot/dts/apple/t8103.dtsi     | 12 ++++++++++++
>  2 files changed, 17 insertions(+)

Doesn't break U-Boot or OpenBSD.

Reviewed-by: Mark Kettenis <kettenis@...nbsd.org>

> diff --git a/arch/arm64/boot/dts/apple/t8103-j274.dts b/arch/arm64/boot/dts/apple/t8103-j274.dts
> index e0f6775b9878..16c5eb7f53b1 100644
> --- a/arch/arm64/boot/dts/apple/t8103-j274.dts
> +++ b/arch/arm64/boot/dts/apple/t8103-j274.dts
> @@ -17,6 +17,7 @@ / {
>  
>  	aliases {
>  		serial0 = &serial0;
> +		serial2 = &serial2;
>  	};
>  
>  	chosen {
> @@ -43,3 +44,7 @@ memory@...000000 {
>  &serial0 {
>  	status = "okay";
>  };
> +
> +&serial2 {
> +	status = "okay";
> +};
> diff --git a/arch/arm64/boot/dts/apple/t8103.dtsi b/arch/arm64/boot/dts/apple/t8103.dtsi
> index 63056ddc7ef7..844ed7bd0451 100644
> --- a/arch/arm64/boot/dts/apple/t8103.dtsi
> +++ b/arch/arm64/boot/dts/apple/t8103.dtsi
> @@ -126,6 +126,18 @@ serial0: serial@...200000 {
>  			status = "disabled";
>  		};
>  
> +		serial2: serial@...208000 {
> +			compatible = "apple,s5l-uart";
> +			reg = <0x2 0x35208000 0x0 0x1000>;
> +			reg-io-width = <4>;
> +			interrupt-parent = <&aic>;
> +			interrupts = <AIC_IRQ 607 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&clkref>, <&clkref>;
> +			clock-names = "uart", "clk_uart_baud0";
> +			power-domains = <&ps_uart2>;
> +			status = "disabled";
> +		};
> +
>  		aic: interrupt-controller@...100000 {
>  			compatible = "apple,t8103-aic", "apple,aic";
>  			#interrupt-cells = <3>;
> -- 
> 2.33.0
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 

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