Re: [linux-sunxi] [PATCH v2] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to meet SoC specifications

[Iain Paton]

Acked-by: Iain Paton <ipaton0@xxxxxxxxx>

On 04/08/15 22:08, Timo Sigurdsson wrote:
> sun7i-a20.dtsi contains a cpufreq operating point at 0.9 volts. The minimum
> CPU voltage for the Allwinner A20 SoC, however, is 1.0 volts. Thus, raise
> the voltage for the lowest operating point to 1.0 volts in order to stay
> within the SoC specifications. It is an undervolted setting that isn't
> stable across all SoCs and boards out there.
> 
> Signed-off-by: Timo Sigurdsson <public_timo.s@xxxxxxxxxxxxxx>
> ---
> Changes since v1:
> 
> - Fixed checkpatch warnings
> - Changed the commit message and title to clarify that this is not a board-specific issue, but rather a limitation by the SoC  
> ---
>  arch/arm/boot/dts/sun7i-a20.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi b/arch/arm/boot/dts/sun7i-a20.dtsi
> index 6a63f30..f5f384c 100644
> --- a/arch/arm/boot/dts/sun7i-a20.dtsi
> +++ b/arch/arm/boot/dts/sun7i-a20.dtsi
> @@ -107,7 +107,7 @@
>  				720000	1200000
>  				528000	1100000
>  				312000	1000000
> -				144000	900000
> +				144000	1000000
>  				>;
>  			#cooling-cells = <2>;
>  			cooling-min-level = <0>;
> 

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