git.rot13.org Git - linux-gpio-pinout/blob - device-tree/gpio-3-buttons.dts

   1 /dts-v1/;
   2 /plugin/;
   3
   4 / {
   5         compatible = "allwinner,sun4i-a10", "allwinner,sun7i-a20", "allwinner,sun50i-a64", "allwinner,sun50i-h5";
   6
   7         /*
   8          * This fragment is needed only for the internal pull-up activation,
   9          * external pull-up resistor is highly recommended if using long wires
  10          */
  11
  12         fragment@0 {
  13                 target = <&pio>;
  14                 __overlay__ {
  15                         gpio_button_0: gpio_button_0 {
  16                                 pins = "PG3","PG1","PG5";
  17                                 function = "gpio_in";
  18                                 bias-pull-up;
  19                         };
  20                 };
  21         };
  22
  23         fragment@1 {
  24                 target-path = "/";
  25                 __overlay__ {
  26                         gpio-3-buttons {
  27                                 /*
  28                                  * Use "gpio-keys" for EINT capable pins, "gpio-keys-polled" for other pins
  29                                  * add "poll-interval" property if using "gpio-keys-polled"
  30                                  */
  31 /*
  32                                 compatible = "gpio-keys";
  33 */
  34                                 compatible = "gpio-keys-polled";
  35                                 poll-interval = <100>;
  36                                 autorepeat;
  37
  38                                 pinctrl-names = "default";
  39                                 pinctrl-0 = <&gpio_button_0>;
  40
  41                                 up {
  42                                         label = "button-up";
  43                                         linux,code = <103>; /* KEY_UP, see include/uapi/linux/input-event-codes.h */
  44                                         gpios = <&pio 6 3 1>; /* PG3 GPIO_ACTIVE_LOW */
  45                                 };
  46
  47                                 down {
  48                                         label = "button-down";
  49                                         linux,code = <108>; /* KEY_DOWN, see include/uapi/linux/input-event-codes.h */
  50                                         gpios = <&pio 6 1 1>; /* PG1 GPIO_ACTIVE_LOW */
  51                                 };
  52
  53                                 enter {
  54                                         label = "button-enter";
  55                                         linux,code = <28>; /* KEY_DOWN, see include/uapi/linux/input-event-codes.h */
  56                                         gpios = <&pio 6 5 1>; /* PG5 GPIO_ACTIVE_LOW */
  57                                 };
  58                         };
  59                 };
  60         };
  61 };