linux-kernel - Re: [PATCH v2 04/19] ARM: dts: Add DMC bus frequency for exynos3250-rinato/monk

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Message-id: <5668CDC1.7080108@samsung.com>
Date:	Thu, 10 Dec 2015 09:56:33 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	myungjoo.ham@...sung.com, kgene@...nel.org
Cc:	kyungmin.park@...sung.com, robh+dt@...nel.org, pawel.moll@....com,
	mark.rutland@....com, ijc+devicetree@...lion.org.uk,
	galak@...eaurora.org, linux@....linux.org.uk,
	tjakobi@...h.uni-bielefeld.de, linux.amoon@...il.com,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 04/19] ARM: dts: Add DMC bus frequency for
 exynos3250-rinato/monk

On 2015년 12월 10일 09:53, Krzysztof Kozlowski wrote:
> On 09.12.2015 13:07, Chanwoo Choi wrote:
>> This patch adds the DMC (Dynamic Memory Controller) bus frequency node
>> which includes the devfreq-events and regulator properties. The bus
>> frequency support the DVFS (Dynamic Voltage Frequency Scaling) feature
>> with ondemand governor.
>>
>> The devfreq-events (ppmu_dmc0*) can monitor the utilization of DMC bus
>> on runtime and the buck1_reg (VDD_MIF power line) supplies the power to
>> the DMC block.
>>
>> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
>> ---
>>  arch/arm/boot/dts/exynos3250-monk.dts   | 6 ++++++
>>  arch/arm/boot/dts/exynos3250-rinato.dts | 6 ++++++
>>  2 files changed, 12 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/exynos3250-monk.dts b/arch/arm/boot/dts/exynos3250-monk.dts
>> index 443a35085846..d982586a6533 100644
>> --- a/arch/arm/boot/dts/exynos3250-monk.dts
>> +++ b/arch/arm/boot/dts/exynos3250-monk.dts
>> @@ -498,6 +498,12 @@
>>  	};
>>  };
>>  
>> +&bus_dmc {
>> +	devfreq-events = <&ppmu_dmc0_3>, <&ppmu_dmc1_3>;
>> +	vdd-supply = <&buck1_reg>;
>> +	status = "okay";
>> +};
>> +
>>  &xusbxti {
>>  	clock-frequency = <24000000>;
>>  };
>> diff --git a/arch/arm/boot/dts/exynos3250-rinato.dts b/arch/arm/boot/dts/exynos3250-rinato.dts
>> index 3e64d5dcdd60..61477943015b 100644
>> --- a/arch/arm/boot/dts/exynos3250-rinato.dts
>> +++ b/arch/arm/boot/dts/exynos3250-rinato.dts
>> @@ -675,6 +675,12 @@
>>  	};
>>  };
>>  
>> +&bus_dmc {
>> +	devfreq-events = <&ppmu_dmc0_3>, <&ppmu_dmc1_3>;
>> +	vdd-supply = <&buck1_reg>;
>> +	status = "okay";
>> +};
> 
> I would prefer to put this in alphabetical order... which could be
> tricky because the nodes are not entirely sorted. Maybe after the "&adc"
> node?

OK. I'll move it.

> 
> Anyway the change looks good:
> 
> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>

Thanks for your review.

Regards,
Chanwoo Choi

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