linux-kernel - Re: [PATCH v1 3/6] arm64: dts: imx8mq-librem5: wire up the wifi regulator

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Date:   Mon, 4 Oct 2021 20:00:57 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Martin Kepplinger <martin.kepplinger@...i.sm>
Cc:     robh@...nel.org, kernel@...gutronix.de, festevam@...il.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, phone-devel@...r.kernel.org,
        kernel@...i.sm, Guido Günther <agx@...xcpu.org>
Subject: Re: [PATCH v1 3/6] arm64: dts: imx8mq-librem5: wire up the wifi
 regulator

On Mon, Sep 13, 2021 at 03:57:03PM +0200, Martin Kepplinger wrote:
> From: Guido Günther <agx@...xcpu.org>
> 
> Connect the wifi power regulator to the corresponding GPIO.
> 
> Signed-off-by: Guido Günther <agx@...xcpu.org>
> Signed-off-by: Martin Kepplinger <martin.kepplinger@...i.sm>
> ---
>  arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi b/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi
> index ba26c6ee98a0..b5562c8f9a3c 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi
> @@ -138,9 +138,15 @@ reg_vsys_3v4: regulator-vsys-3v4 {
>  
>  	reg_wifi_3v3: regulator-wifi-3v3 {
>  		compatible = "regulator-fixed";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_wifi_pwr>;
>  		regulator-name = "3V3_WIFI";
>  		regulator-min-microvolt = <3300000>;
>  		regulator-max-microvolt = <3300000>;
> +		gpio = <&gpio3 10 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +		vin-supply = <&reg_vdd_3v3>;
> +		regulator-always-on;

Any reason you need to have this always-on?

Shawn

>  	};
>  
>  	sound {
> @@ -638,6 +644,13 @@ MX8MQ_IOMUXC_SD2_RESET_B_USDHC2_RESET_B 0xc1
>  		>;
>  	};
>  
> +	pinctrl_wifi_pwr: wifipwrgrp {
> +		fsl,pins = <
> +			/* WIFI3V3_EN */
> +			MX8MQ_IOMUXC_NAND_DATA04_GPIO3_IO10	0x83
> +		>;
> +	};
> +
>  	pinctrl_wdog: wdoggrp {
>  		fsl,pins = <
>  			/* nWDOG */
> -- 
> 2.30.2
>