linux-kernel - Re: [DONOTAPPLY RFC PATCH v2 4/4] arm64: dts: samsung,coreprimevelte: add wifi node

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Message-ID: <aTCv75hjdX5XvgCh@google.com>
Date: Wed, 3 Dec 2025 13:47:27 -0800
From: Brian Norris <briannorris@...omium.org>
To: Karel Balej <balejk@...fyz.cz>
Cc: Johannes Berg <johannes@...solutions.net>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Duje Mihanović <duje@...emihanovic.xyz>,
	Andrew Lunn <andrew@...n.ch>,
	Gregory Clement <gregory.clement@...tlin.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Francesco Dolcini <francesco@...cini.it>,
	Ulf Hansson <ulf.hansson@...aro.org>, Frank Li <Frank.Li@....com>,
	linux-wireless@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mmc@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
	phone-devel@...r.kernel.org, Jeff Chen <jeff.chen_1@....com>,
	Peng Fan <peng.fan@....com>
Subject: Re: [DONOTAPPLY RFC PATCH v2 4/4] arm64: dts:
 samsung,coreprimevelte: add wifi node

On Sun, Oct 26, 2025 at 07:20:41PM +0100, Karel Balej wrote:
> Add a node for the phone's WiFi serviced by the Marvell SD8777 chip a
> communication with which happens over the SDIO. Also enable a regulator
> without which it is not possible to connect to networks although they
> are discovered properly.
> 
> Signed-off-by: Karel Balej <balejk@...fyz.cz>
> ---
>  .../mmp/pxa1908-samsung-coreprimevelte.dts        | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts b/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts
> index b2ce5edd9c6a..36d6ae4e902e 100644
> --- a/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts
> +++ b/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts
> @@ -475,6 +475,14 @@ ldo14: ldo14 {
>  				regulator-min-microvolt = <1200000>;
>  				regulator-max-microvolt = <3300000>;
>  			};
> +
> +			/*
> +			 * Needs to be enabled in order for the WiFi to be able
> +			 * to connect to networks.
> +			 */
> +			ldo15 {
> +				regulator-always-on;

Do we have a min/max voltage for this regulator?

> +			};
>  		};
>  	};
>  };
> @@ -523,6 +531,13 @@ &sdh1 {
>  	pinctrl-1 = <&sdh1_fast_pins_0 &sdh1_fast_pins_1 &sdh1_pins_2>;
>  	bus-width = <4>;
>  	non-removable;
> +	#address-cells = <1>;
> +	#size-cells = <0>;

I wonder if this should have:

	vmmc-supply = <&ldo16>;

rather than regulator-always-on above.

Brian

> +
> +	wifi@1 {
> +		compatible = "marvell,sd8777";
> +		reg = <1>;
> +	};
>  };
>  
>  &pwm3 {
> -- 
> 2.51.1
>