linux-kernel - Re: [PATCH 3/6] ARM: sun8i: r40: add 5V regulator for Banana Pi M2 Ultra

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Date:   Mon, 9 Oct 2017 23:04:07 +0200
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Icenowy Zheng <icenowy@...c.io>
Cc:     Chen-Yu Tsai <wens@...e.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH 3/6] ARM: sun8i: r40: add 5V regulator for Banana Pi M2
 Ultra

On Sun, Oct 08, 2017 at 04:29:03AM +0000, Icenowy Zheng wrote:
> On newer revisions of the Banana Pi M2 Ultra boards, the 5V power output
> (used by HDMI, SATA and USB) is controller via a GPIO.
> 
> Add the regulator node for it.
> 
> Older revisions just have the 5V power output always on, and the GPIO is
> reserved on these boards. So it won't affect the older revisions.
> 
> Signed-off-by: Icenowy Zheng <icenowy@...c.io>
> ---
>  arch/arm/boot/dts/sun8i-r40-bananapi-m2-ultra.dts | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sun8i-r40-bananapi-m2-ultra.dts b/arch/arm/boot/dts/sun8i-r40-bananapi-m2-ultra.dts
> index 7b52608cebe6..035599d870b9 100644
> --- a/arch/arm/boot/dts/sun8i-r40-bananapi-m2-ultra.dts
> +++ b/arch/arm/boot/dts/sun8i-r40-bananapi-m2-ultra.dts
> @@ -78,6 +78,15 @@
>  		};
>  	};
>  
> +	reg_vcc5v0: vcc5v0 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vcc5v0";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +		gpio = <&pio 7 23 GPIO_ACTIVE_HIGH>; /* PH23 */
> +		enable-active-high;

This is redundant with the GPIO flag

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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