1* GPIO Decoder DT bindings 2 3Required Properties: 4- compatible: should be "gpio-decoder" 5- gpios: a spec of gpios (at least two) to be decoded to a number with 6 first entry representing the MSB. 7 8Optional Properties: 9- decoder-max-value: Maximum possible value that can be reported by 10 the gpios. 11- linux,axis: the input subsystem axis to map to (ABS_X/ABS_Y). 12 Defaults to 0 (ABS_X). 13 14Example: 15 gpio-decoder0 { 16 compatible = "gpio-decoder"; 17 gpios = <&pca9536 3 GPIO_ACTIVE_HIGH>, 18 <&pca9536 2 GPIO_ACTIVE_HIGH>, 19 <&pca9536 1 GPIO_ACTIVE_HIGH>, 20 <&pca9536 0 GPIO_ACTIVE_HIGH>; 21 linux,axis = <0>; /* ABS_X */ 22 decoder-max-value = <9>; 23 }; 24