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Convert the adc-keys binding to DT schema format.
The old binding has 'label' as required, but it should never be
required given it's just a human readable description.
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220608211207.2058487-6-robh@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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The current description of ADC keys is not precise enough.
"when this key is pressed" leaves it open if a key is considered pressed
below or above the threshold. This has led to confusion:
drivers/input/keyboard/adc-keys.c ignores the meaning of thresholds and
sets the key that is closest to press-threshold-microvolt.
This patch nails down the definitions and provides an interpretation of the
supplied example.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201222110815.24121-1-xypron.glpk@gmx.de
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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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>
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Rob Herring
Heinrich Schuchardt
Alexandre Belloni