linux-kernel - Re: [PATCH v2 1/1] arm64: dts: allwinner: h6: Enable CPU opp tables for OrangePi One Plus

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Date:   Tue, 5 Jul 2022 00:17:34 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Chukun Pan <amadeus@....edu.cn>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/1] arm64: dts: allwinner: h6: Enable CPU opp tables
 for OrangePi One Plus

On 5/10/22 10:30 AM, Chukun Pan wrote:
> Enable CPU opp tables for OrangePi One Plus.
> 
> This needs to change the CPU regulator max voltage to fit
> the OPP table.
> 
> Signed-off-by: Chukun Pan <amadeus@....edu.cn>
> ---
>  arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi
> index 92745128fcfe..7773c51438ce 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi

Putting the changes in this file also applies them to the OrangePi Lite2 and
OrangePi 3.

Did you test OrangePi Lite2? They both use the same PMIC with a similar
configuration, so it may be safe to assume that what works on OrangePi One Plus
also works there, but I am not sure.

OrangePi 3 already includes the OPP header and these changes, so it is safe but
redundant.

Either these changes need to be made in sun50i-h6-orangepi-one-plus.dts, or we
need to remove the duplicate changes from sun50i-h6-orangepi-3.dts.

Regards,
Samuel

> @@ -5,6 +5,7 @@
>  /dts-v1/;
>  
>  #include "sun50i-h6.dtsi"
> +#include "sun50i-h6-cpu-opp.dtsi"
>  
>  #include <dt-bindings/gpio/gpio.h>
>  
> @@ -64,6 +65,10 @@ reg_vcc5v: vcc5v {
>  	};
>  };
>  
> +&cpu0 {
> +	cpu-supply = <&reg_dcdca>;
> +};
> +
>  &de {
>  	status = "okay";
>  };
> @@ -208,7 +213,7 @@ reg_cldo3: cldo3 {
>  			reg_dcdca: dcdca {
>  				regulator-always-on;
>  				regulator-min-microvolt = <810000>;
> -				regulator-max-microvolt = <1080000>;
> +				regulator-max-microvolt = <1160000>;
>  				regulator-name = "vdd-cpu";
>  			};
>  
>