DD-GPS-TCLKIN-00A0.dts

/*
 * Copyright (C) 2013 the8thlayerof.net
 *
 * GPS cape
 * UART4 on pins P9.11, P9.13
 * PPS on pin P8.7
 * TCLKIN on pin P9.41
 *
 * note: disable BB-BONELT-HDMI in /boot/uboot/uEnv.txt, mcasp0 on P9.41B conflicts with P9.41A
 * cape_disable=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN
 *
 * 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/;

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

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

        /* state the resources this cape uses */
        exclusive-use =
                /* the pin header uses */
                "P9.11",        /* uart4_rxd/GPS TX */
                "P9.13",        /* uart4_txd/GPS RX */
                "P8.7",         /* timer4/GPS PPS   */
		"P9.41A",       /* TCLKIN   */
		"P9.41B",       /* tied to TCLKIN   */
                /* the hardware ip uses */
                "uart4",   /* 0-based counting */
                "gpio2_2", /* 0-based counting */
		"timer4";  /* 1-based counting */

        fragment@0 {
                target = <&am33xx_pinmux>;
                __overlay__ {
                        gps_uart4_pins: pinmux_gps_uart4_pins {
                                pinctrl-single,pins = <
					0x70 0x26 /* P9.11 uart4_rxd MODE6 INPUT (RX) */
                                        0x74 0x06 /* P9.13 uart4_txd MODE6 OUTPUT (TX) */
                                >;
                        };
                        
                        gps_pps_pins: pinmux_gps_pps_pins {
				pinctrl-single,pins = <
				      0x90 0x22 /* P8.7 MODE2 TIMER4 */
                                      0x1b4 0x2A /* P9.41A MODE2 TCLKIN */
                                      0x1a8 0x0F /* P9.41B MODE7 INPUT (high-Z, tied to P9.41A) - conflicts with HDMI */
				>;
			};
										
                };
        };

	fragment@1 {
                target = <&uart5>;	/* 1-based counting */
                __overlay__ {
                        status = "okay";
                        pinctrl-names = "default";
                        pinctrl-0 = <&gps_uart4_pins>;
                };
	};

	fragment@2 {
		target = <&ocp>;
				
                __overlay__ {
			pps_gmtimer {
				compatible = "pps-gmtimer";
				status = "okay";
				timer = <&timer4>;
				pinctrl-names = "default";
				pinctrl-0 = <&gps_pps_pins>;
				use-tclkin = <1>;
			};
		};
	};
};