linux-kernel - Re: [PATCH 08/10] ARM: dts: Add rtc and adc dt node for exynos3250-artik5 module

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Date:	Mon, 14 Mar 2016 16:21:08 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>, kgene@...nel.org,
	s.nawrocki@...sung.com, tomasz.figa@...il.com
Cc:	jh80.chung@...sung.com, andi.shyti@...sung.com,
	inki.dae@...sung.com, sw0312.kim@...sung.com,
	pankaj.dubey@...sung.com, linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH 08/10] ARM: dts: Add rtc and adc dt node for
 exynos3250-artik5 module

On 2016년 03월 14일 16:12, Krzysztof Kozlowski wrote:
> On 14.03.2016 11:04, Chanwoo Choi wrote:
>> This patch adds the RTC (Real Time Clock) and ADC (Analog Digital Converter)
>> Device Tree node for exynos3250-artik5 module. The RTC is used for wakeup
>> source and the ADC is used to read the analog data such as battery temperature.
>>
>> ADC need to connect the some H/W device such as battery. So, this patch just
>> adds the default setting (clock, regulator).
>>
>> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
>> ---
>>  arch/arm/boot/dts/exynos3250-artik5.dtsi | 12 ++++++++++++
>>  1 file changed, 12 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/exynos3250-artik5.dtsi b/arch/arm/boot/dts/exynos3250-artik5.dtsi
>> index 877e4827df83..673883fda480 100644
>> --- a/arch/arm/boot/dts/exynos3250-artik5.dtsi
>> +++ b/arch/arm/boot/dts/exynos3250-artik5.dtsi
>> @@ -48,6 +48,12 @@
>>  	};
>>  };
>>  
>> +&adc {
>> +	vdd-supply = <&ldo7_reg>;
>> +	assigned-clocks = <&cmu CLK_SCLK_TSADC>;
>> +	assigned-clock-rates = <6000000>;
>> +};
> 
> No thermistors, status non-okay. What is provided here?

The some device are not connected for ADC line on artik5-eval board.
This dt node just initialize the basic setting (clock,regulator) ADC of exynos3250 SoC.
(I'll change the board name from artik5-devel to artik5-eval on v2 patchset)

The vdd-supply for ADC is already fixed on artik5 module.

> 
>> +
>>  &cpu0 {
>>  	cpu0-supply = <&buck2_reg>;
>>  };
>> @@ -319,6 +325,12 @@
>>  	status = "okay";
>>  };
>>  
>> +&rtc {
>> +	clocks = <&cmu CLK_RTC>, <&s2mps14_osc S2MPS11_CLK_AP>;
>> +	clock-names = "rtc", "rtc_src";
>> +	status = "okay";
>> +};
> 
> Same comment as for previous patch - just squash it. Splitting brings no
> benefits and makes it more difficult to see bigger picture.

Okay. I'll merge it with 5/10 patch.

Best Regards,
Chanwoo Choi