linux-kernel - Re: [PATCH 3/9] arm64: dts: allwinner: pinebook: Remove unused AXP803 regulators

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Date:   Tue, 21 Jan 2020 10:05:39 +0100
From:   Maxime Ripard <mripard@...nel.org>
To:     Samuel Holland <samuel@...lland.org>
Cc:     Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH 3/9] arm64: dts: allwinner: pinebook: Remove unused
 AXP803 regulators

On Sun, Jan 19, 2020 at 10:30:58AM -0600, Samuel Holland wrote:
> The Pinebook does not use the CSI bus on the A64. In fact it does not
> use GPIO port E for anything at all. Thus the following regulators are
> not used and do not need voltages set:
>
>  - ALDO1: Connected to VCC-PE only
>  - DLDO3: Not connected
>  - ELDO3: Not connected
>
> Signed-off-by: Samuel Holland <samuel@...lland.org>
> ---
>  .../boot/dts/allwinner/sun50i-a64-pinebook.dts   | 16 +---------------
>  1 file changed, 1 insertion(+), 15 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts
> index ff32ca1a495e..8e7ce6ad28dd 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts
> @@ -202,9 +202,7 @@
>  };
>
>  &reg_aldo1 {
> -	regulator-min-microvolt = <2800000>;
> -	regulator-max-microvolt = <2800000>;
> -	regulator-name = "vcc-csi";
> +	regulator-name = "vcc-pe";
>  };

If it's connected to PE, I'd expect the voltage to be at 3.3v?

Maxime

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