linux-kernel - Re: [PATCH v3 2/3] arm64: dts: marvell: espressobin-ultra: add PHY and switch reset pins

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Date:   Mon, 09 May 2022 10:57:33 +0200
From:   Gregory CLEMENT <gregory.clement@...tlin.com>
To:     Robert Marko <robert.marko@...tura.hr>, andrew@...n.ch,
        sebastian.hesselbarth@...il.com, robh+dt@...nel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, pali@...nel.org
Cc:     Robert Marko <robert.marko@...tura.hr>
Subject: Re: [PATCH v3 2/3] arm64: dts: marvell: espressobin-ultra: add PHY
 and switch reset pins

Robert Marko <robert.marko@...tura.hr> writes:

> Both the Topaz switch and 88E1512 PHY have their reset and interrupts
> connected to the SoC.
>
> So, define the Topaz and 88E1512 reset pins in the DTS.
>
> Defining the interrupt pins wont work as both the 88E1512 and the
> Topaz switch uses active LOW IRQ signals but the A37xx GPIO controller
> only supports edge triggers.
> 88E1512 would require special setup anyway as its INT pin is shared with
> the LED2 and you first need to configure it as INT.
>
> Signed-off-by: Robert Marko <robert.marko@...tura.hr>
> Reviewed-by: Andrew Lunn <andrew@...n.ch>


Applied on mvebu/dt64

Thanks,

Gregory


> ---
>  arch/arm64/boot/dts/marvell/armada-3720-espressobin-ultra.dts | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/marvell/armada-3720-espressobin-ultra.dts b/arch/arm64/boot/dts/marvell/armada-3720-espressobin-ultra.dts
> index 610ff6f385c7..7c786d218f1b 100644
> --- a/arch/arm64/boot/dts/marvell/armada-3720-espressobin-ultra.dts
> +++ b/arch/arm64/boot/dts/marvell/armada-3720-espressobin-ultra.dts
> @@ -114,12 +114,16 @@ &usb3 {
>  &mdio {
>  	extphy: ethernet-phy@1 {
>  		reg = <1>;
> +
> +		reset-gpios = <&gpionb 2 GPIO_ACTIVE_LOW>;
>  	};
>  };
>  
>  &switch0 {
>  	reg = <3>;
>  
> +	reset-gpios = <&gpiosb 23 GPIO_ACTIVE_LOW>;
> +
>  	ports {
>  		switch0port1: port@1 {
>  			reg = <1>;
> -- 
> 2.31.1
>

-- 
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com