| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | * GPIO Decoder DT bindings |
| 2 | |
| 3 | Required 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 | |
| 8 | Optional 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 | |
| 14 | Example: |
| 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 | }; |