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cubelinux-kernel/Documentation/devicetree/bindings/input/gpio-decoder.txt
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Greg Kroah-Hartman 598cf27219 Linux 6.19.3
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org
Tested-by: Florian Fainelli <florian.fainelli@broadcom.com>
Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com>
Tested-by: Peter Schneider <pschneider1968@googlemail.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Salvatore Bonaccorso <carnil@debian.org>
Tested-by: Brett A C Sheffield <bacs@librecast.net>
Tested-by: Mark Brown <broonie@kernel.org>
Tested-by: Luna Jernberg <droidbittin@gmail.com>
Tested-by: Ronald Warsow <rwarsow@gmx.de>
Tested-by: Justin M. Forbes <jforbes@fedoraproject.org>
Tested-by: Ron Economos <re@w6rz.net>
Tested-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2026-02-19 16:33:27 +01:00

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* GPIO Decoder DT bindings
Required Properties:
- compatible: should be "gpio-decoder"
- gpios: a spec of gpios (at least two) to be decoded to a number with
first entry representing the MSB.
Optional Properties:
- decoder-max-value: Maximum possible value that can be reported by
the gpios.
- linux,axis: the input subsystem axis to map to (ABS_X/ABS_Y).
Defaults to 0 (ABS_X).
Example:
gpio-decoder0 {
compatible = "gpio-decoder";
gpios = <&pca9536 3 GPIO_ACTIVE_HIGH>,
<&pca9536 2 GPIO_ACTIVE_HIGH>,
<&pca9536 1 GPIO_ACTIVE_HIGH>,
<&pca9536 0 GPIO_ACTIVE_HIGH>;
linux,axis = <0>; /* ABS_X */
decoder-max-value = <9>;
};