BB-TLC5940-01-00A0.dts

/*
 * Copyright (C) 2013 CircuitCo
 *
 * Virtual cape for SPI0 on connector pins P9.22 P9.21 P9.18 P9.17
 *
 * 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", "ti,beaglebone-green";

	/* identification */
	part-number = "BB-TLC5940-01";
	version = "00A0";

	/* state the resources this cape uses */
	exclusive-use =
		/* the pin header uses */
		"P9.17",	/* spi0_cs0 */
		"P9.18",	/* spi0_d1 */
		"P9.21",	/* spi0_d0 */
		"P9.22",	/* spi0_sclk */
		"P9.25",	/* xlat */
		/* the hardware ip uses */
		"gpio3_21",
		"spi0";

	fragment@0 {
		target = <&am33xx_pinmux>;
		__overlay__ {
			/* default state has all gpios released and mode set to uart1 */
			bb_spi0_pins: pinmux_bb_spi0_pins {
				pinctrl-single,pins = <
					0x150 0x30	/* spi0_sclk.spi0_sclk,		INPUT_PULLUP | MODE0 */
					0x154 0x30	/* spi0_d0.spi0_d0,		INPUT_PULLUP | MODE0 */
					0x158 0x10	/* spi0_d1.spi0_d1,		OUTPUT_PULLUP | MODE0 */
					0x15c 0x10	/* spi0_cs0.spi0_cs0,		OUTPUT_PULLUP | MODE0 */
				>;
			};
			bb_latch_pins: pinmux_bb_latch_pins {
				pinctrl-single,pins = <
					0x1ac 0x37	/* mcasp0_ahclkx.gpio3_21,	RX_ENABLED | PULLUP | MODE7 */
					0x1a4 0x37	/* mcasp0_fsr.gpio3_19		RX_ENABLED | PULLUP | MODE7 */
				>;
			};
		};
	};

	fragment@1 {
		target = <&spi0>;
		__overlay__ {
			#address-cells = <1>;
			#size-cells = <0>;

			status = "okay";
			pinctrl-names = "default";
			pinctrl-0 = <&bb_spi0_pins>;
			ti,pio-mode; /* disable dma when used as an overlay, dma gets stuck at 160 bits... */

			tlc5940@0 {
				#address-cells = <1>;
				#size-cells = <0>;

				compatible = "ti,tlc5940";
				pinctrl-names = "tlc5940-xlat";
				pinctrl-0 = <&bb_latch_pins>;
				chain-sz-max = <16>;
				gpio-xlat = <&gpio3 21 1>;
				gpio-blank = <&gpio3 19 1>;
				reg = <0>;
				spi-max-frequency = <30000000>;
				spi-cpha;
			};
		};
	};
};