linux-kernel - Re: [PATCH 6/6] arm: dts: exynos4: set opp-suspend for DMC and leftbus

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Date:   Thu, 22 Nov 2018 12:09:31 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     Lukasz Luba <l.luba@...tner.samsung.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org
Cc:     tjakobi@...h.uni-bielefeld.de, myungjoo.ham@...sung.com,
        kyungmin.park@...sung.com, rjw@...ysocki.net, len.brown@...el.com,
        pavel@....cz, gregkh@...uxfoundation.org, keescook@...omium.org,
        anton@...msg.org, ccross@...roid.com, tony.luck@...el.com,
        robh+dt@...nel.org, mark.rutland@....com, kgene@...nel.org,
        krzk@...nel.org, m.szyprowski@...sung.com, b.zolnierkie@...sung.com
Subject: Re: [PATCH 6/6] arm: dts: exynos4: set opp-suspend for DMC and
 leftbus

Hi,

On 2018년 11월 22일 03:01, Lukasz Luba wrote:
> Mark the state for devfreq device while entring suspend/resume process.
> 
> The patch draws on Tobias Jakobi's work posted ~2 years ago, who tried to
> solve issue with devfreq device's frequency during suspend/resume.
> During the discussion on LKML some corner cases and comments appeared
> related to the design. This patch address them keeping in mind suggestions
> from Chanwoo Choi.
> 
> Suggested-by: Tobias Jakobi <tjakobi@...h.uni-bielefeld.de>
> Suggested-by: Chanwoo Choi <cw00.choi@...sung.com>
> Signed-off-by: Lukasz Luba <l.luba@...tner.samsung.com>
> ---
>  arch/arm/boot/dts/exynos4210.dtsi | 2 ++
>  arch/arm/boot/dts/exynos4412.dtsi | 2 ++
>  2 files changed, 4 insertions(+)

Looks good to me.
Reviewed-by: Chanwoo Choi <cw00.choi@...sung.com>

> 
> diff --git a/arch/arm/boot/dts/exynos4210.dtsi b/arch/arm/boot/dts/exynos4210.dtsi
> index b6091c2..4429b72 100644
> --- a/arch/arm/boot/dts/exynos4210.dtsi
> +++ b/arch/arm/boot/dts/exynos4210.dtsi
> @@ -298,6 +298,7 @@
>  			opp-400000000 {
>  				opp-hz = /bits/ 64 <400000000>;
>  				opp-microvolt = <1150000>;
> +				opp-suspend;
>  			};
>  		};
>  
> @@ -367,6 +368,7 @@
>  			};
>  			opp-200000000 {
>  				opp-hz = /bits/ 64 <200000000>;
> +				opp-suspend;
>  			};
>  		};
>  	};
> diff --git a/arch/arm/boot/dts/exynos4412.dtsi b/arch/arm/boot/dts/exynos4412.dtsi
> index 51f72f0..908c0c4 100644
> --- a/arch/arm/boot/dts/exynos4412.dtsi
> +++ b/arch/arm/boot/dts/exynos4412.dtsi
> @@ -432,6 +432,7 @@
>  			opp-400000000 {
>  				opp-hz = /bits/ 64 <400000000>;
>  				opp-microvolt = <1050000>;
> +				opp-suspend;
>  			};
>  		};
>  
> @@ -520,6 +521,7 @@
>  			opp-200000000 {
>  				opp-hz = /bits/ 64 <200000000>;
>  				opp-microvolt = <1000000>;
> +				opp-suspend;
>  			};
>  		};
>  
> 


-- 
Best Regards,
Chanwoo Choi
Samsung Electronics