linux-kernel - Re: [PATCH v3 07/10] ARM: dts: sunxi: Add usb3_vbus regulator to common regulators dtsi

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Date:	Sun, 1 Feb 2015 15:20:07 +0100
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Chen-Yu Tsai <wens@...e.org>
Cc:	Mike Turquette <mturquette@...aro.org>,
	Emilio Lopez <emilio@...pez.com.ar>,
	Rob Herring <robh+dt@...nel.org>,
	Grant Likely <grant.likely@...aro.org>,
	Kishon Vijay Abraham I <kishon@...com>,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH v3 07/10] ARM: dts: sunxi: Add usb3_vbus regulator to
 common regulators dtsi

On Wed, Jan 28, 2015 at 03:54:12AM +0800, Chen-Yu Tsai wrote:
> Some SoCs have a total of 4 possible USB controllers. One such example
> is the A80, which has one USB3 dual role device and 3 EHCI/OHCI pairs.
> 
> Add a common VBUS regulator for the last host controller.
> 
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>
> ---
>  arch/arm/boot/dts/sunxi-common-regulators.dtsi | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sunxi-common-regulators.dtsi b/arch/arm/boot/dts/sunxi-common-regulators.dtsi
> index e02baa66b33c..97fe8d73c4f7 100644
> --- a/arch/arm/boot/dts/sunxi-common-regulators.dtsi
> +++ b/arch/arm/boot/dts/sunxi-common-regulators.dtsi
> @@ -130,6 +130,16 @@
>  		status = "disabled";
>  	};
>  
> +	reg_usb3_vbus: usb3-vbus {
> +		compatible = "regulator-fixed";
> +		pinctrl-names = "default";
> +		regulator-name = "usb3-vbus";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +		enable-active-high;
> +		status = "disabled";
> +	};
> +

I don't think you replied to this one. What other SoC is using the
USB3 regulator? Is it worth it to put it in there and bloat all the
other DTS for something that is only used on a single board so far?

Maxime

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

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