Re: [PATCH 6/6] ARM: dts: sun8i: raise the max voltage of DCDC2 in sun8i reference tablets

From	Maxime Ripard <maxime.ripard@free-electrons.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 6/6] ARM: dts: sun8i: raise the max voltage of DCDC2 in sun8i reference tablets
Date	2016-12-13 20:20 +0100
Message-ID	<sO0Mh-52F-1@gated-at.bofh.it> (permalink)
References	<sNXEJ-2Zs-33@gated-at.bofh.it> <sO0Mh-52F-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

[Multipart message — attachments visible in raw view] - view raw

On Tue, Dec 13, 2016 at 11:22:52PM +0800, Icenowy Zheng wrote:
> The "extremity_freq" frequency described in the original FEX files uses
> a voltage of 1.46v, which is beyond the current maximum voltage value of
> DCDC2 (Cortex-A7 supply) in the sun8i reference tablet DTSI file.
> 
> Raise the maximum value to 1.46v.
> 
> Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz>
> ---
>  arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi b/arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi
> index 7ac8bb4bc95a..325ca5bd67a5 100644
> --- a/arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi
> +++ b/arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi
> @@ -180,7 +180,7 @@
>  &reg_dcdc2 {
>  	regulator-always-on;
>  	regulator-min-microvolt = <900000>;
> -	regulator-max-microvolt = <1400000>;
> +	regulator-max-microvolt = <1460000>;

This is outside of the voltage range tolerated by the CPU. NAK.

Maxime

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

Back to linux.kernel | Previous | Next | Find similar | Unroll thread

Thread

Re: [PATCH 6/6] ARM: dts: sun8i: raise the max voltage of DCDC2 in  sun8i reference tablets Maxime Ripard <maxime.ripard@free-electrons.com> - 2016-12-13 20:20 +0100

csiph-web