linux-kernel - Re: [PATCH v4 4/4] mfd: max77693: Update DT binding to support haptic

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Date:	Tue, 16 Sep 2014 16:59:58 +0900
From:	Jaewon Kim <jaewon02.kim@...sung.com>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org
Subject: Re: [PATCH v4 4/4] mfd: max77693: Update DT binding to support haptic

Dear Lee Jones,


2014년 09월 16일 08:00에 Lee Jones 이(가) 쓴 글:
> On Thu, 11 Sep 2014, Jaewon Kim wrote:
>
>> This patch add haptic DT binding documentation and example
>> to support haptic driver in max77693 Multifunction device.
>>
>> Signed-off-by: Jaewon Kim <jaewon02.kim@...sung.com>
>> Acked-by: Chanwoo Choi <cw00.choi@...sung.com>
>> ---
>>   Documentation/devicetree/bindings/mfd/max77693.txt |   18 ++++++++++++++++++
>>   1 file changed, 18 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/mfd/max77693.txt b/Documentation/devicetree/bindings/mfd/max77693.txt
>> index 11921cc..d178b9e 100644
>> --- a/Documentation/devicetree/bindings/mfd/max77693.txt
>> +++ b/Documentation/devicetree/bindings/mfd/max77693.txt
>> @@ -27,6 +27,17 @@ Optional properties:
>>   
>>   	[*] refer Documentation/devicetree/bindings/regulator/regulator.txt
>>   
>> +- haptic : The haptic of max77693 have to be instantiated under subnod
> Perhaps a description as to what "The haptic" is might be handy?
Ok, I will add description about haptic.

>
> s/have/has
>
> s/subnod/subnode
>
> What do you mean by "under" a subnode?  Do you mean "as a" subnode?
>
>> +  named "haptic" using the following haptic format in example.
> What is the "haptic format"?  It just looks like a normal node to me.
>
>> +  Haptic sensation from motor can be changed by changing a period cycle in pwms.
> Is "Haptic sensation" a technical term?
>
> s/from motor/from a motor/
>
> s/changed by changing/changed by varying/
>
> s/period cycle/duty cycle/
>
> s/in pwms/in the pwms property/
How is it if I change in this way?

haptic : Referring to the term Haptic, It is the use of advanced 
vibration patterns
     and waveforms to convey information to a user or operator.

     MAX77693 uses PWM and MOTOR in order to give Haptic.
     The Haptic from a motor can be changed by varying a period/duty 
cycle in pwms.

>
>> +
>> + Required properties:
>> +	- compatible : Must be "maxim,max77693-hpatic"
>> +	- haptic-supply : power supply for haptic motor
> s/for haptic/for the haptic/
>
>> +		[*] refer Documentation/devicetree/bindings/regulator/regulator.txt
>> +	- pwms : phandle to the physical PWM device,
> It's not just the phandle though is it?
Do you want more description?
Or it mean the wrong?

>
>> +		[*] refer Documentation/devicetree/bindings/pwm/pwm.txt
>> +
>>   Example:
>>   	max77693@66 {
>>   		compatible = "maxim,max77693";
>> @@ -52,4 +63,11 @@ Example:
>>   					regulator-boot-on;
>>   			};
>>   		};
>> +
>> +		haptic {
>> +			compatible = "maxim,max77693-haptic";
>> +			haptic-supply = <&haptic_supply>;
>> +			pwms = <&pwm 0 40000 0>;
>> +			pwm-names = "haptic";
>> +		};
>>   	};

Thank you for feedback.
And plz review "[PATCH v4 3/4] mfd: max77693: add haptic of_compatible 
in mfd_cell".

thanks.
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