linux-kernel - Re: [PATCH] extcon: arizona: Implement button detection support

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Message-id: <501238FB.6020403@samsung.com>
Date:	Fri, 27 Jul 2012 15:45:15 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	MyungJoo Ham <myungjoo.ham@...sung.com>,
	patches@...nsource.wolfsonmicro.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] extcon: arizona: Implement button detection support

On 07/26/2012 05:11 PM, Mark Brown wrote:

> On Thu, Jul 26, 2012 at 09:10:08AM +0900, Chanwoo Choi wrote:
> 
>> If user press BTN_0 and BTN_1 at the same time and then user only
>> released BTN_0 but BTN_1 is still pressed, is it right that report
>> released event to all of buttons? I think that different event between
>> BTN_0 and BTN_1.
> 
> That situation can't occur, the hardware can only detect one button at
> once - if two buttons are pressed simultaneusly only one will be
> reported.  This is just a standard resistive headset button detection
> mechanism.
> 

OK,

Acked-by: Chanwoo Choi <cw00.choi@...sung.com>

Thank you,
Chanwoo Choi
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