bbb-gpio-keypad-00A0.dts

   1 /*
   2  * bbb-gpio-keypad - simple navigation keypad for the BeagleBone Black
   3  *
   4  * Copyright (C) 2018  Antonio Ospite <ao2@ao2.it>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /dts-v1/;
  21 /plugin/;
  22
  23 #include <dt-bindings/board/am335x-bbw-bbb-base.h>
  24 #include <dt-bindings/gpio/gpio.h>
  25 #include <dt-bindings/pinctrl/am33xx.h>
  26
  27 / {
  28     compatible = "ti,beaglebone", "ti,beaglebone-black";
  29
  30     // Identification.
  31     part-number = "bbb-gpio-keypad";
  32     version = "00A0";
  33
  34     // Resources this cape uses, see also https://ao2.it/137
  35     exclusive-use =
  36       "P8.07",
  37       "P8.08",
  38       "P8.09",
  39       "P8.10",
  40       "P8.26",
  41       "P9.15";
  42
  43     fragment@0 {
  44         target = <&am33xx_pinmux>;
  45         __overlay__ {
  46             keypad_pins: pinmux_gpio_pins{
  47                 pinctrl-single,pins = <
  48                     BONE_P8_07 (PIN_INPUT_PULLUP | MUX_MODE7)
  49                     BONE_P8_08 (PIN_INPUT_PULLUP | MUX_MODE7)
  50                     BONE_P8_09 (PIN_INPUT_PULLUP | MUX_MODE7)
  51                     BONE_P8_10 (PIN_INPUT_PULLUP | MUX_MODE7)
  52                     BONE_P8_26 (PIN_INPUT_PULLUP | MUX_MODE7)
  53                     BONE_P9_15 (PIN_INPUT_PULLUP | MUX_MODE7)
  54                 >;
  55             };
  56         };
  57     };
  58
  59     fragment@1 {
  60         target-path = "/";
  61         __overlay__ {
  62             gpio_keys {
  63                 compatible = "gpio-keys";
  64                 autorepeat;
  65                 pinctrl-names = "default";
  66                 pinctrl-0 = <&keypad_pins>;
  67
  68                 up {
  69                     label = "GPIO Key UP";
  70                     linux,code = <103>;
  71                     gpios = <&gpio2 2 GPIO_ACTIVE_LOW>;
  72                     debounce_interval = <50>;
  73                 };
  74                 left {
  75                     label = "GPIO Key LEFT";
  76                     linux,code = <105>;
  77                     gpios = <&gpio2 3 GPIO_ACTIVE_LOW>;
  78                     debounce_interval = <50>;
  79                 };
  80                 right {
  81                     label = "GPIO Key RIGHT";
  82                     linux,code = <106>;
  83                     gpios = <&gpio2 5 GPIO_ACTIVE_LOW>;
  84                     debounce_interval = <50>;
  85                 };
  86                 down {
  87                     label = "GPIO Key DOWN";
  88                     linux,code = <108>;
  89                     gpios = <&gpio2 4 GPIO_ACTIVE_LOW>;
  90                     debounce_interval = <50>;
  91                 };
  92                 enter {
  93                     label = "GPIO Key ENTER";
  94                     linux,code = <28>;
  95                     gpios = <&gpio1 29 GPIO_ACTIVE_LOW>;
  96                     debounce_interval = <50>;
  97                 };
  98                 esc {
  99                     label = "GPIO Key ESC";
 100                     linux,code = <1>;
 101                     gpios = <&gpio1 16 GPIO_ACTIVE_LOW>;
 102                     debounce_interval = <50>;
 103                 };
 104             };
 105         };
 106     };
 107 };
 108