linux-kernel - Re: [PATCH 3/6] arm64: dts: qcom: x1e80100-vivobook-s15: enable ps8830 retimers

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Message-ID: <vijkpvomiv3nonumyqoeut2k3ajftf7cafx56ngjlc3uuwqfcb@7o75sm3kh36d>
Date: Mon, 3 Nov 2025 00:21:31 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: maud_spierings@...mail.com
Cc: Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 3/6] arm64: dts: qcom: x1e80100-vivobook-s15: enable
 ps8830 retimers

On Sat, Nov 01, 2025 at 01:54:14PM +0100, Maud Spierings via B4 Relay wrote:
> From: Maud Spierings <maud_spierings@...mail.com>
> 
> The Asus vivobook s15 has two usb type c ports on the left side, these
> use parade ps8830 retimers like the others, enable them to also enable
> dp altmode
> 
> Signed-off-by: Maud Spierings <maud_spierings@...mail.com>
> ---
>  .../boot/dts/qcom/x1e80100-asus-vivobook-s15.dts   | 310 ++++++++++++++++++++-
>  1 file changed, 302 insertions(+), 8 deletions(-)
> 
> @@ -158,6 +174,102 @@ vph_pwr: regulator-vph-pwr {
>  		regulator-boot-on;
>  	};
>  
> +	vreg_rtmr0_1p15: regulator-rtmr0-1p15 {

'vph-pwr' > 'rtmr0'

> +		compatible = "regulator-fixed";
> +
> +		regulator-name = "VREG_RTMR0_1P15";
> +		regulator-min-microvolt = <1150000>;
> +		regulator-max-microvolt = <1150000>;
> +
> +		gpio = <&pmc8380_5_gpios 8 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-0 = <&usb0_pwr_1p15_reg_en>;
> +		pinctrl-names = "default";
> +
> +		regulator-boot-on;
> +	};
> +
> +	vreg_rtmr0_1p8: regulator-rtmr0-1p8 {
> +		compatible = "regulator-fixed";
> +
> +		regulator-name = "VREG_RTMR0_1P8";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +
> +		gpio = <&pm8550ve_9_gpios 8 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-0 = <&usb0_1p8_reg_en>;
> +		pinctrl-names = "default";
> +
> +		regulator-boot-on;
> +	};
> +
> +	vreg_rtmr0_3p3: regulator-rtmr0-3p3 {
> +		compatible = "regulator-fixed";
> +
> +		regulator-name = "VREG_RTMR0_3P3";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +
> +		gpio = <&pm8550_gpios 11 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-0 = <&usb0_3p3_reg_en>;
> +		pinctrl-names = "default";
> +
> +		regulator-boot-on;
> +	};
> +
> +	vreg_rtmr1_1p15: regulator-rtmr1-1p15 {
> +		compatible = "regulator-fixed";
> +
> +		regulator-name = "VREG_RTMR1_1P15";
> +		regulator-min-microvolt = <1150000>;
> +		regulator-max-microvolt = <1150000>;
> +
> +		gpio = <&tlmm 188 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-0 = <&usb1_pwr_1p15_reg_en>;
> +		pinctrl-names = "default";
> +
> +		regulator-boot-on;
> +	};
> +
> +	vreg_rtmr1_1p8: regulator-rtmr1-1p8 {
> +		compatible = "regulator-fixed";
> +
> +		regulator-name = "VREG_RTMR1_1P8";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +
> +		gpio = <&tlmm 175 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-0 = <&usb1_pwr_1p8_reg_en>;
> +		pinctrl-names = "default";
> +
> +		regulator-boot-on;
> +	};
> +
> +	vreg_rtmr1_3p3: regulator-rtmr1-3p3 {
> +		compatible = "regulator-fixed";
> +
> +		regulator-name = "VREG_RTMR1_3P3";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +
> +		gpio = <&tlmm 186 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-0 = <&usb1_pwr_3p3_reg_en>;
> +		pinctrl-names = "default";
> +
> +		regulator-boot-on;
> +	};
> +
>  	/*
>  	 * TODO: These two regulators are actually part of the removable M.2
>  	 * card and not the CRD mainboard. Need to describe this differently.
> @@ -506,15 +618,62 @@ touchpad@15 {
>  &i2c1 {
>  	clock-frequency = <400000>;
>  	status = "okay";
> -
> -	/* PS8830 USB4 Retimer? @ 0x8 */

No retimer on this bus?

>  };
>  

-- 
With best wishes
Dmitry