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     // Free up the pins from the pinmux helper
  44     fragment@0 {
  45         target = <&ocp>;
  46         __overlay__ {
  47             P8_07_pinmux { status = "disabled"; };
  48             P8_08_pinmux { status = "disabled"; };
  49             P8_09_pinmux { status = "disabled"; };
  50             P8_10_pinmux { status = "disabled"; };
  51             P8_26_pinmux { status = "disabled"; };
  52             P9_15_pinmux { status = "disabled"; };
  53         };
  54     };
  55
  56     fragment@1 {
  57         target = <&am33xx_pinmux>;
  58         __overlay__ {
  59             keypad_pins: pinmux_gpio_pins {
  60                 pinctrl-single,pins = <
  61                     BONE_P8_07 (PIN_INPUT_PULLUP | MUX_MODE7)
  62                     BONE_P8_08 (PIN_INPUT_PULLUP | MUX_MODE7)
  63                     BONE_P8_09 (PIN_INPUT_PULLUP | MUX_MODE7)
  64                     BONE_P8_10 (PIN_INPUT_PULLUP | MUX_MODE7)
  65                     BONE_P8_26 (PIN_INPUT_PULLUP | MUX_MODE7)
  66                     BONE_P9_15 (PIN_INPUT_PULLUP | MUX_MODE7)
  67                 >;
  68             };
  69         };
  70     };
  71
  72     fragment@2 {
  73         target-path = "/";
  74         __overlay__ {
  75             gpio_keys {
  76                 compatible = "gpio-keys";
  77                 autorepeat;
  78                 pinctrl-names = "default";
  79                 pinctrl-0 = <&keypad_pins>;
  80
  81                 up {
  82                     label = "GPIO Key UP";
  83                     linux,code = <103>;
  84                     gpios = <&gpio2 2 GPIO_ACTIVE_LOW>;
  85                     debounce_interval = <50>;
  86                 };
  87                 left {
  88                     label = "GPIO Key LEFT";
  89                     linux,code = <105>;
  90                     gpios = <&gpio2 3 GPIO_ACTIVE_LOW>;
  91                     debounce_interval = <50>;
  92                 };
  93                 right {
  94                     label = "GPIO Key RIGHT";
  95                     linux,code = <106>;
  96                     gpios = <&gpio2 5 GPIO_ACTIVE_LOW>;
  97                     debounce_interval = <50>;
  98                 };
  99                 down {
 100                     label = "GPIO Key DOWN";
 101                     linux,code = <108>;
 102                     gpios = <&gpio2 4 GPIO_ACTIVE_LOW>;
 103                     debounce_interval = <50>;
 104                 };
 105                 enter {
 106                     label = "GPIO Key ENTER";
 107                     linux,code = <28>;
 108                     gpios = <&gpio1 29 GPIO_ACTIVE_LOW>;
 109                     debounce_interval = <50>;
 110                 };
 111                 esc {
 112                     label = "GPIO Key ESC";
 113                     linux,code = <1>;
 114                     gpios = <&gpio1 16 GPIO_ACTIVE_LOW>;
 115                     debounce_interval = <50>;
 116                 };
 117             };
 118         };
 119     };
 120 };