linux-kernel - Re: [linux-sunxi] [PATCH] ARM: dts: sun8i: r40: bananapi-m2-ultra: Fix dcdc1 regulator

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Message-ID: <a25ee214-5316-f6c8-53ce-676aa3c8a8ca@centosproject.org>
Date:   Mon, 24 Aug 2020 17:54:01 -0300
From:   Pablo Sebastián Greco <pgreco@...tosproject.org>
To:     jernej.skrabec@...l.net, mripard@...nel.org, wens@...e.org
Cc:     robh+dt@...nel.org, icenowy@...c.io, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [linux-sunxi] [PATCH] ARM: dts: sun8i: r40: bananapi-m2-ultra:
 Fix dcdc1 regulator


On 24/8/20 16:36, Jernej Skrabec wrote:
> DCDC1 regulator powers many different subsystems. While some of them can
> work at 3.0 V, some of them can not. For example, VCC-HDMI can only work
> between 3.24 V and 3.36 V. According to OS images provided by the board
> manufacturer this regulator should be set to 3.3 V.
>
> Set DCDC1 and DCDC1SW to 3.3 V in order to fix this.
>
> Fixes: da7ac948fa93 ("ARM: dts: sun8i: Add board dts file for Banana Pi M2
> 		      Ultra")
> Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
> ---
>   arch/arm/boot/dts/sun8i-r40-bananapi-m2-ultra.dts | 10 +++++-----
>   1 file changed, 5 insertions(+), 5 deletions(-)
>
> 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 42d62d1ba1dc..ea15073f0c79 100644
> --- a/arch/arm/boot/dts/sun8i-r40-bananapi-m2-ultra.dts
> +++ b/arch/arm/boot/dts/sun8i-r40-bananapi-m2-ultra.dts
> @@ -223,16 +223,16 @@ &reg_aldo3 {
>   };
>   
>   &reg_dc1sw {
> -	regulator-min-microvolt = <3000000>;
> -	regulator-max-microvolt = <3000000>;
> +	regulator-min-microvolt = <3300000>;
> +	regulator-max-microvolt = <3300000>;
>   	regulator-name = "vcc-gmac-phy";
>   };
>   
>   &reg_dcdc1 {
>   	regulator-always-on;
> -	regulator-min-microvolt = <3000000>;
> -	regulator-max-microvolt = <3000000>;
> -	regulator-name = "vcc-3v0";
> +	regulator-min-microvolt = <3300000>;
> +	regulator-max-microvolt = <3300000>;
> +	regulator-name = "vcc-3v3";
>   };
>   
>   &reg_dcdc2 {


Should this be done also for the bananapi-m2-berry?, it is basically the 
same device
sun8i-v40-bananapi-m2-berry.dts


Pablo