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| author | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2016-08-29 19:57:06 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2016-08-29 20:00:58 -0700 |
| commit | 680772647d96ed853d20f837a2726151f24d8b20 (patch) | |
| tree | 79e7d495a74ca81775e13c6b5b1b4756baff67b6 /drivers/input/keyboard/Kconfig | |
| parent | f959cd8c0eafe2bdaa9d0ec3e3da3b9451ad38aa (diff) | |
| download | lwn-680772647d96ed853d20f837a2726151f24d8b20.tar.gz lwn-680772647d96ed853d20f837a2726151f24d8b20.zip | |
Input: add ADC resistor ladder driver
A common way of multiplexing buttons on a single input in cheap devices is
to use a resistor ladder on an ADC. This driver supports that configuration
by polling an ADC channel provided by IIO.
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/keyboard/Kconfig')
| -rw-r--r-- | drivers/input/keyboard/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 509608c95994..cbd75cf44739 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -12,6 +12,21 @@ menuconfig INPUT_KEYBOARD if INPUT_KEYBOARD +config KEYBOARD_ADC + tristate "ADC Ladder Buttons" + depends on IIO + select INPUT_POLLDEV + help + This driver implements support for buttons connected + to an ADC using a resistor ladder. + + Say Y here if your device has such buttons connected to an ADC. Your + board-specific setup logic must also provide a configuration data + for mapping voltages to buttons. + + To compile this driver as a module, choose M here: the + module will be called adc_keys. + config KEYBOARD_ADP5520 tristate "Keypad Support for ADP5520 PMIC" depends on PMIC_ADP5520 |