cape-bone-mrf24j40-00A0.dts

/*
 * Copyright (C) 2013 Alan Ott <alan@signal11.us>
 *
 * 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 = "BB-BONE-MRF24J40";
	version = "00A0";

	/* state the resources this cape uses */
	exclusive-use =
		/* the pin header uses */
		"P8.11",	/* gpio1_13 */
		"P8.16",	/* gpio1_14 */
		"P8.26",	/* gpio1_29 */
		"P9.31",	/* spi1_sclk */
		"P9.29",	/* spi1_d0 */
		"P9.30",	/* spi1_d1 */
		"P9.28",	/* spi1_cs0 */
		/* the hardware IP uses */
		"gpio1_13",
		"gpio1_14",
		"gpio1_29",
		"spi1";

	fragment@0 {
		target = <&am33xx_pinmux>;
		__overlay__ {
			mrf24j40_cape_pins: pinmux_mrf24j40_cape_pins {
				pinctrl-single,pins = <
					/* Pinmux comes from TRM section
					   9.3.1: CONTROL_MODULE Regusters. */

					/* so use GPIO1_13 (rst), GPIO1_14 (wake), then SPI1_CS0 (CS), and GPIO1_29 (INT) */
					0x34 0x37 /* gpmc_ad13.gpio1_13 input, pull up, mode 7 */
					0x38 0x2f /* gpmc_ad14.gpio1_14 input, no pull, mode 7 */
					0x7c 0x2f /* gpmc_csn0.gpio1_29 input, no pull, mode 7 */
				>;
			};
			bone_mrf24j40_spi1_pins: pinmux_bone_mrf24j40_spi1_pins {
				pinctrl-single,pins = <
					0x190 0x33	/* mcasp0_aclkx.spi1_sclk, RX_ENABLED | PULLUP | MODE3 */
					0x194 0x33	/* mcasp0_fsx.spi1_d0, RX_ENABLED | PULLUP | MODE3 */
					0x198 0x33	/* mcasp0_axr0.spi1_d1, RX_ENABLED | PULLUP | MODE3 */
					0x19c 0x33	/* mcasp0_ahclkr.spi1_cs0, RX_ENABLED | PULLUP | MODE3 */
				>;
			};
		};
	};


	fragment@1 {
		target = <&spi1>;

		__overlay__ {
			/* needed to avoid DTC warnings */
			#address-cells = <1>;
			#size-cells = <0>;

			status = "okay";
			pinctrl-names = "default";
			pinctrl-0 = <&bone_mrf24j40_spi1_pins>;

			mrf24j40@0 {
				compatible = "mrf24j40ma";
				reg = <0>; /* CHIPSEL */
				spi-max-frequency = <20000000>;
				mode = <0>;
				pinctrl-names = "default";
				pinctrl-0 = <&mrf24j40_cape_pins>;

				interrupt-parent = <&gpio2>;
				interrupts = <29>;

				//mrf24j40-wake = <&gpio4 19>;
				//mrf24j40-reset = <gpio21 0>;
			};
		};
	};
};