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kernel_xiaomi_sm8450-device…/bindings/input/gpio-decoder.txt
Venkata Narendra Kumar Gutta b0e5152a74 dt-bindings: Add devicetree bindings to devicetree project
Add devicetree bindings snapshot to the devicetree project.
This snapshot is taken as of the
'commit 5fba1b18cfc72e264e5f3ce49020ed322aa6ac9f ("Merge 5.6-rc3
into android-mainline")' of the kernel project.

Change-Id: Ia087ab2b7d4a2616ea446a69683a8b5b821d0448
2020-05-07 20:43:53 -07:00

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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>;
};