linux-kernel - Re: [PATCH v2 08/13] ARM: dts: imx6qdl-kontron-samx6i: add SDIO_PWR

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Date: Mon, 17 Jun 2024 09:40:18 +0800
From: Shawn Guo <shawnguo2@...h.net>
To: Michael Walle <mwalle@...nel.org>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>, Li Yang <leoyang.li@....com>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, Priit Laes <plaes@...es.org>,
	Michael Grzeschik <m.grzeschik@...gutronix.de>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Marco Felsch <m.felsch@...gutronix.de>, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 08/13] ARM: dts: imx6qdl-kontron-samx6i: add
 SDIO_PWR_EN support

On Thu, Jun 06, 2024 at 11:02:01AM +0200, Michael Walle wrote:
> The module can enable/disable the SD card power supply and has
> it's dedicated pin SDIO_PWR_EN for that reason. This is esp.
> useful to be able to reset the SD card if it was in an UHS mode.
> 
> Signed-off-by: Michael Walle <mwalle@...nel.org>
> ---
>  .../dts/nxp/imx/imx6qdl-kontron-samx6i.dtsi   | 20 ++++++++++++++++++-
>  1 file changed, 19 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/nxp/imx/imx6qdl-kontron-samx6i.dtsi b/arch/arm/boot/dts/nxp/imx/imx6qdl-kontron-samx6i.dtsi
> index 4d3cd338a707..d36743e47552 100644
> --- a/arch/arm/boot/dts/nxp/imx/imx6qdl-kontron-samx6i.dtsi
> +++ b/arch/arm/boot/dts/nxp/imx/imx6qdl-kontron-samx6i.dtsi
> @@ -61,6 +61,18 @@ reg_3p3v_s5: regulator-3p3v-s5 {
>  		vin-supply = <&reg_smarc_suppy>;
>  	};
>  
> +	reg_sdio: regulator-sdio {
> +		compatible = "regulator-fixed";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_reg_sdio>;
> +		regulator-name = "V_3V3_SD";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		gpio = <&gpio1 29 GPIO_ACTIVE_HIGH>;
> +		off-on-delay-us = <20000>;
> +		enable-active-high;

enable-active-high right after line of GPIO_ACTIVE_HIGH.

Shawn

> +	};
> +
>  	reg_smarc_lcdbklt: regulator-smarc-lcdbklt {
>  		compatible = "regulator-fixed";
>  		pinctrl-names = "default";
> @@ -640,6 +652,12 @@ MX6QDL_PAD_SD1_CMD__PWM4_OUT 0x1b0b1
>  		>;
>  	};
>  
> +	pinctrl_reg_sdio: reg-sdiogrp {
> +		fsl,pins = <
> +			MX6QDL_PAD_ENET_TXD1__GPIO1_IO29 0x1b0b0 /* SDIO_PWR_EN */
> +		>;
> +	};
> +
>  	pinctrl_uart1: uart1grp {
>  		fsl,pins = <
>  			MX6QDL_PAD_CSI0_DAT11__UART1_RX_DATA 0x1b0b1
> @@ -692,7 +710,6 @@ MX6QDL_PAD_SD3_DAT3__SD3_DATA3 0x17059
>  
>  			MX6QDL_PAD_NANDF_CS1__GPIO6_IO14 0x1b0b0 /* CD */
>  			MX6QDL_PAD_ENET_RXD1__GPIO1_IO26 0x1b0b0 /* WP */
> -			MX6QDL_PAD_ENET_TXD1__GPIO1_IO29 0x1b0b0 /* PWR_EN */
>  		>;
>  	};
>  
> @@ -795,6 +812,7 @@ &usdhc3 {
>  	pinctrl-0 = <&pinctrl_usdhc3>;
>  	cd-gpios = <&gpio6 14 GPIO_ACTIVE_LOW>;
>  	wp-gpios = <&gpio1 26 GPIO_ACTIVE_HIGH>;
> +	vmmc-supply = <&reg_sdio>;
>  	no-1-8-v;
>  };
>  
> -- 
> 2.39.2
>