linux-kernel - Re: Input: tca8418-keypad: Incorrect values in a driver

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Message-ID: <55352535.3030505@free-electrons.com>
Date:	Mon, 20 Apr 2015 18:11:33 +0200
From:	Michael Opdenacker <michael.opdenacker@...e-electrons.com>
To:	"Valdez, Jonathan" <j.valdez@...com>
CC:	dmitry.torokhov@...il.com, kyle.manna@...l7.com, hns@...delico.com,
	linux-input@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Input: tca8418-keypad: Incorrect values in a driver

Hi Jonathan,

Thank you for reporting this issue!

On 03/30/2015 06:41 PM, Valdez, Jonathan wrote:
>
> Hello,
>
>  
>
> I’ve been supporting the TCA8418 and have been pointed to your
> document by a few customers
> (http://lxr.free-electrons.com/source/drivers/input/keyboard/tca8418_keypad.c)
>
>  
>
>  
>
> The problem I am seeing is that you are writing a 1 to
> REG_DEBOUNCE_DIS1/2/3, which actually disables column debouncing. A 0
> enables it. This is easily fixed, but I wanted to bring this to your
> attention.
>
>  
>
> Please see page 19 of the TCA8418 datasheet, where the registers are
> debounce_DIS(able) registers. A 0 keeps debouncing enabled. By default
> debounce is enabled.
>
>  
>
> Best regards,
>
> Jonathan Valdez
>
> System Connectivity Applications
>

I'm not the maintainer of this code though, just showing the source code
on our LXR webste. I'm CCing the guys in charge.

Cheers,

Michael.

-- 
Michael Opdenacker, CEO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
+33 484 258 098


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