what is the meaning of matrix_keypad_platform_data.active_low

DISCUSSION Xiangfu Liu 2 participants 2 messages Aug 25, 2009 HID

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Xiangfu Liu

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2009-08-25 07:19 UTC #0 lore raw

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?

thanks for help.

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Xiangfu Liu
Email: xiangfu at qi-hardware dot com
Web: http://www.qi-hardware.com

Marek Vasut

2009-08-25 10:21 UTC #1 lore raw

Dne Út 25. srpna 2009 09:18:23 Xiangfu Liu napsal(a):

Quoted 10 lines

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.

Quoted 2 lines

thanks for help.

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