[PATCH] arm64: dts: marvell: armada-3720-db: Add vmmc regulator for SD slot

[gregory.clement@free-electrons.com (Gregory CLEMENT)]

Hi,
 
 On mar., ao?t 29 2017, Gregory CLEMENT <gregory.clement@free-electrons.com> wrote:

> By adding this regulator, a proper reset is done during boot. Without
> this, the UHS failed to be detected after a warm reboot when the SD card
> remained in the slot, then it fallback to an HS.
>
> Note that the vmcc is supported by the xenon driver only with the
> following fix: "mmc: sdhci-xenon: add set_power callback".
>
> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

Applied on mvebu/dt64

Gregory
> ---
>  arch/arm64/boot/dts/marvell/armada-3720-db.dts | 11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/marvell/armada-3720-db.dts b/arch/arm64/boot/dts/marvell/armada-3720-db.dts
> index 9df0f06ce607..e6e0f38ce6e1 100644
> --- a/arch/arm64/boot/dts/marvell/armada-3720-db.dts
> +++ b/arch/arm64/boot/dts/marvell/armada-3720-db.dts
> @@ -94,6 +94,16 @@
>  			  3300000 0x0>;
>  		enable-active-high;
>  	};
> +
> +	vcc_sd_reg2: regulator-vmcc {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vcc_sd2";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-boot-on;
> +		enable-active-high;
> +		gpio = <&gpio_exp 4 GPIO_ACTIVE_HIGH>;
> +	};
>  };
>  
>  /* Gigabit module on CON19(V2.0)/CON21(V1.4) */
> @@ -179,6 +189,7 @@
>  	bus-width = <4>;
>  	marvell,pad-type = "sd";
>  	vqmmc-supply = <&vcc_sd_reg1>;
> +	vmmc-supply = <&vcc_sd_reg2>;
>  	status = "okay";
>  };
>  
> -- 
> 2.14.1
>

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com