/*
 * Copyright (C) 2016 Shane Short <shanes@wacan.asn.au>
 * Hardware design by Brenton Hewitt <hewball@hewball.com.au>
 *
 * Combined GPS (with PPS) and Dallas 1W sensor bus cape.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
*/
/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", "ti,beaglebone-green";

  /* identification */
  part-number = "BBB-WACAN-GPS";
  version = "00A0";

  /* state the resources this cape uses */
  exclusive-use =
   "P8.8",          /* GPS PPS Signal */
   "P9.11",         /* UART4_rxd */
   "P9.13",         /* UART4_txd */
   "P9.22",         /* Dallas 1W Bus */
   
   "uart4",         /* UART 4 for GPS NMEA */
   "gpio2_3";       /* 1PPS timing signal */

  fragment@0 {
    target = <&am33xx_pinmux>;
    __overlay__ {

      /* Dallas 1W bus pinmux */
      dallas_w1_pins: pinmux_dallas_w1_pins {
        pinctrl-single,pins = < BONE_P9_22 (PIN_INPUT_PULLUP | MUX_MODE7) >;
      };

      /* Standard BB UART4 Pinmux */
      bb_uart4_pins: pinmux_bb_uart4_pins {
        pinctrl-single,pins = <
          BONE_P9_13 (PIN_OUTPUT | MUX_MODE6)
          BONE_P9_11 (PIN_INPUT  | MUX_MODE6)
        >;
      };

      /* GPS 1 PPS Input */
      gps_pps_pins: pinmux_gps_pps_pins {
        pinctrl-single,pins = < BONE_P8_08 (PIN_INPUT | MUX_MODE7) >;
      };

    };
  };

  /* UART 4 Fragment */
  fragment@1 {
    target = <&uart4>;
    __overlay__ {
        status = "okay";
        pinctrl-names = "default";
        pinctrl-0 = <&bb_uart4_pins>;
   };
  };

  /* PPS GPIO Fragment */
  fragment@2 {
    target = <&ocp>;
    __overlay__ {
      pps {
        compatible = "pps-gpio";
        status = "okay";
        pinctrl-names = "default";
        pinctrl-0 = <&gps_pps_pins>;
        gpios = <&gpio2 3 0 >;
        assert-rising-edge;
      };
    };
  };

  /* Dallas 1W Fragment */
  fragment@3 {
    target-path="/";
    __overlay__ {

      onewire {
        status = "okay";
        pinctrl-names = "default";
        pinctrl-0 = <&dallas_w1_pins>;

        compatible = "w1-gpio";
        gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
      };
    };
  };
};