linux-kernel - Re: [PATCH v5 10/10] arm64: dts: actions: Add uSD support for Cubieboard7

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Message-ID: <20200712173044.GL6110@Mani-XPS-13-9360>
Date:   Sun, 12 Jul 2020 23:00:44 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Amit Singh Tomar <amittomer25@...il.com>
Cc:     andre.przywara@....com, afaerber@...e.de, robh+dt@...nel.org,
        cristian.ciocaltea@...il.com, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-actions@...ts.infradead.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v5 10/10] arm64: dts: actions: Add uSD support for
 Cubieboard7

On Thu, Jul 02, 2020 at 08:22:56PM +0530, Amit Singh Tomar wrote:
> This commit adds uSD support for Cubieboard7 board based on Actions Semi
> S700 SoC. SD0 is connected to uSD slot. Since there is no PMIC support
> added yet, fixed regulator has been used as a regulator node.
> 
> Signed-off-by: Amit Singh Tomar <amittomer25@...il.com>
> ---
> Changes since v4:
> 	* No change.
> Changes since v3:
>         * No change.
> Changes since v2:
>         * No change.
> Changes since v1:
>         * No change.
> Changes since RFC:
>         * No change.
> ---
>  arch/arm64/boot/dts/actions/s700-cubieboard7.dts | 41 ++++++++++++++++++++++++
>  arch/arm64/boot/dts/actions/s700.dtsi            |  1 +
>  2 files changed, 42 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/actions/s700-cubieboard7.dts b/arch/arm64/boot/dts/actions/s700-cubieboard7.dts
> index 63e375cd9eb4..ec117eb12f3a 100644
> --- a/arch/arm64/boot/dts/actions/s700-cubieboard7.dts
> +++ b/arch/arm64/boot/dts/actions/s700-cubieboard7.dts
> @@ -13,6 +13,7 @@
>  
>  	aliases {
>  		serial3 = &uart3;
> +		mmc0 = &mmc0;
>  	};
>  
>  	chosen {
> @@ -28,6 +29,23 @@
>  		device_type = "memory";
>  		reg = <0x1 0xe0000000 0x0 0x0>;
>  	};
> +
> +	/* Fixed regulator used in the absence of PMIC */
> +	vcc_3v1: vcc-3v1 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "fixed-3.1V";
> +		regulator-min-microvolt = <3100000>;
> +		regulator-max-microvolt = <3100000>;
> +	};

Is this regulator used somewhere?

Thanks,
Mani

> +
> +	/* Fixed regulator used in the absence of PMIC */
> +	sd_vcc: sd-vcc {
> +		compatible = "regulator-fixed";
> +		regulator-name = "fixed-3.1V";
> +		regulator-min-microvolt = <3100000>;
> +		regulator-max-microvolt = <3100000>;
> +		regulator-always-on;
> +	};
>  };
>  
>  &i2c0 {
> @@ -81,6 +99,14 @@
>  			bias-pull-up;
>  		};
>  	};
> +
> +	mmc0_default: mmc0_default {
> +		pinmux {
> +			groups = "sd0_d0_mfp", "sd0_d1_mfp", "sd0_d2_d3_mfp",
> +				 "sd0_cmd_mfp", "sd0_clk_mfp";
> +			function = "sd0";
> +		};
> +	};
>  };
>  
>  &timer {
> @@ -90,3 +116,18 @@
>  &uart3 {
>  	status = "okay";
>  };
> +
> +/* uSD */
> +&mmc0 {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&mmc0_default>;
> +	cd-gpios = <&pinctrl 120 GPIO_ACTIVE_LOW>;
> +	no-sdio;
> +	no-mmc;
> +	no-1-8-v;
> +	bus-width = <4>;
> +	vmmc-supply = <&sd_vcc>;
> +	vqmmc-supply = <&sd_vcc>;
> +};
> +
> diff --git a/arch/arm64/boot/dts/actions/s700.dtsi b/arch/arm64/boot/dts/actions/s700.dtsi
> index 9ed88aafc2da..ba498cf9217d 100644
> --- a/arch/arm64/boot/dts/actions/s700.dtsi
> +++ b/arch/arm64/boot/dts/actions/s700.dtsi
> @@ -4,6 +4,7 @@
>   */
>  
>  #include <dt-bindings/clock/actions,s700-cmu.h>
> +#include <dt-bindings/gpio/gpio.h>
>  #include <dt-bindings/interrupt-controller/arm-gic.h>
>  #include <dt-bindings/power/owl-s700-powergate.h>
>  #include <dt-bindings/reset/actions,s700-reset.h>
> -- 
> 2.7.4
>