/*
 * bbb-gpio-keypad - simple navigation keypad for the BeagleBone Black
 *
 * Copyright (C) 2018  Antonio Ospite <ao2@ao2.it>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/dts-v1/;
/plugin/;

#include <dt-bindings/board/am335x-bbw-bbb-base.h>
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/pinctrl/am33xx.h>

/ {
    compatible = "ti,beaglebone", "ti,beaglebone-black";

    // Identification.
    part-number = "bbb-gpio-keypad";
    version = "00A0";

    // Resources this cape uses, see also https://ao2.it/137
    exclusive-use =
        "P8.07",
        "P8.08",
        "P8.09",
        "P8.10",
        "P8.26",
        "P9.15";

    // Free up the pins from the pinmux helper
    fragment@0 {
        target = <&ocp>;
        __overlay__ {
            P8_07_pinmux { status = "disabled"; };
            P8_08_pinmux { status = "disabled"; };
            P8_09_pinmux { status = "disabled"; };
            P8_10_pinmux { status = "disabled"; };
            P8_26_pinmux { status = "disabled"; };
            P9_15_pinmux { status = "disabled"; };
        };
    };

    fragment@1 {
        target = <&am33xx_pinmux>;
        __overlay__ {
            keypad_pins: pinmux_gpio_pins {
                pinctrl-single,pins = <
                    BONE_P8_07 (PIN_INPUT_PULLUP | MUX_MODE7)
                    BONE_P8_08 (PIN_INPUT_PULLUP | MUX_MODE7)
                    BONE_P8_09 (PIN_INPUT_PULLUP | MUX_MODE7)
                    BONE_P8_10 (PIN_INPUT_PULLUP | MUX_MODE7)
                    BONE_P8_26 (PIN_INPUT_PULLUP | MUX_MODE7)
                    BONE_P9_15 (PIN_INPUT_PULLUP | MUX_MODE7)
                >;
            };
        };
    };

    fragment@2 {
        target-path = "/";
        __overlay__ {
            gpio_keys {
                compatible = "gpio-keys";
                autorepeat;
                pinctrl-names = "default";
                pinctrl-0 = <&keypad_pins>;

                up {
                    label = "GPIO Key UP";
                    linux,code = <103>;
                    gpios = <&gpio2 2 GPIO_ACTIVE_LOW>;
                    debounce_interval = <50>;
                };
                left {
                    label = "GPIO Key LEFT";
                    linux,code = <105>;
                    gpios = <&gpio2 3 GPIO_ACTIVE_LOW>;
                    debounce_interval = <50>;
                };
                right {
                    label = "GPIO Key RIGHT";
                    linux,code = <106>;
                    gpios = <&gpio2 5 GPIO_ACTIVE_LOW>;
                    debounce_interval = <50>;
                };
                down {
                    label = "GPIO Key DOWN";
                    linux,code = <108>;
                    gpios = <&gpio2 4 GPIO_ACTIVE_LOW>;
                    debounce_interval = <50>;
                };
                enter {
                    label = "GPIO Key ENTER";
                    linux,code = <28>;
                    gpios = <&gpio1 29 GPIO_ACTIVE_LOW>;
                    debounce_interval = <50>;
                };
                esc {
                    label = "GPIO Key ESC";
                    linux,code = <1>;
                    gpios = <&gpio1 16 GPIO_ACTIVE_LOW>;
                    debounce_interval = <50>;
                };
            };
        };
    };
};