CONFIG_KEYBOARD_CHARLIEPLEX: GPIO driven charlieplex keypad support

General informations

The Linux kernel configuration item CONFIG_KEYBOARD_CHARLIEPLEX:

• prompt: GPIO driven charlieplex keypad support
• type: tristate
• depends on: CONFIG_GPIOLIB || CONFIG_COMPILE_TEST
• defined in drivers/input/keyboard/Kconfig
• found in Linux kernels: 7.1-rc+HEAD
• modules built: charlieplex_keypad

Help text

Enable support for GPIO driven charlieplex keypad. A charlieplex keypad allows to use fewer GPIO lines to interface to key switches. For example, an N lines charlieplex keypad can be used to interface to N^2-N different key switches. However, this type of keypad cannot detect more than one key press at a time.

To compile this driver as a module, choose M here: the module will be called charlieplex_keypad.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb module charlieplex_keypad CONFIG_KEYBOARD_CHARLIEPLEX : drivers/input/keyboard/Kconfig : "GPIO driven charlieplex keypad support" # in 7.1-rc+HEAD
• lkddb of "" "" "gpio-charlieplex-keypad" : CONFIG_INPUT CONFIG_INPUT_KEYBOARD CONFIG_KEYBOARD_CHARLIEPLEX : drivers/input/keyboard/charlieplex_keypad.c # in 7.1-rc+HEAD
• lkddb platform "charlieplex-keypad" : CONFIG_INPUT CONFIG_INPUT_KEYBOARD CONFIG_KEYBOARD_CHARLIEPLEX : drivers/input/keyboard/charlieplex_keypad.c # in 7.1-rc+HEAD

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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