linux-kernel - Re: what is the meaning of matrix_keypad_platform_data.active

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Date:	Tue, 25 Aug 2009 12:21:10 +0200
From:	Marek Vasut <marek.vasut@...il.com>
To:	Xiangfu Liu <xiangfu.z@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org
Subject: Re: what is the meaning of matrix_keypad_platform_data.active_low

Dne Út 25. srpna 2009 09:18:23 Xiangfu Liu napsal(a):
> Hi
> ./include/linux/input/matrix_keypad.h
> there no help in matrix_keypad.h about active_low.
>
> I guess. when set active_low to 1.means:
>
> 0: key press
> 1: key not press
>
> right?

Hi, yeah, it means the GPIO pins have inverted voltage levels.
>
> thanks for help.
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