diff options
| author | Hugo Villeneuve <hvilleneuve@dimonoff.com> | 2026-04-18 22:18:54 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2026-04-19 18:27:01 -0700 |
| commit | 2ca45e57ea027fffe3350ae5e21ad9cecb0dce74 (patch) | |
| tree | ac1b3615052739a813c546f809d0108184e3c7ca /drivers/input/keyboard/Kconfig | |
| parent | 0d64bee764847a488ac33be8ec61b4ae7828f8f1 (diff) | |
Input: charlieplex_keypad - add GPIO charlieplex keypad
Add support for GPIO-based charlieplex keypad, allowing to control
N^2-N keys using N GPIO lines.
Reuse matrix keypad keymap to simplify, even if there is no concept
of rows and columns in this type of keyboard.
Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Link: https://patch.msgid.link/20260312180304.3865850-5-hugo@hugovil.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/keyboard/Kconfig')
| -rw-r--r-- | drivers/input/keyboard/Kconfig | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 2ff4fef322c2..9d1019ba0245 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -289,6 +289,20 @@ config KEYBOARD_MATRIX To compile this driver as a module, choose M here: the module will be called matrix_keypad. +config KEYBOARD_CHARLIEPLEX + tristate "GPIO driven charlieplex keypad support" + depends on GPIOLIB || COMPILE_TEST + select INPUT_MATRIXKMAP + help + 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. + config KEYBOARD_HIL_OLD tristate "HP HIL keyboard support (simple driver)" depends on GSC || HP300 |