arch/arm/boot/dts/am335x-bonegreen-wireless.dts

/*
 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
 *
 * 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/;

#include "am33xx.dtsi"
#include "am335x-bone-common.dtsi"
#include "am335x-bonegreen-common.dtsi"
#include <dt-bindings/interrupt-controller/irq.h>

/ {
	model = "TI AM335x BeagleBone Green Wireless";
	compatible = "ti,am335x-bone-green-wireless", "ti,am335x-bone-green", "ti,am335x-bone-black", "ti,am335x-bone", "ti,am33xx";

	wlan_en_reg: fixedregulator@2 {
		compatible = "regulator-fixed";
		regulator-name = "wlan-en-regulator";
		regulator-min-microvolt = <1800000>;
		regulator-max-microvolt = <1800000>;
		startup-delay-us= <70000>;

		/* WL_EN */
		gpio = <&gpio0 26 0>;
		enable-active-high;
	};
};

&am33xx_pinmux {
	bt_pins: pinmux_bt_pins {
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x878, PIN_OUTPUT_PULLUP | MUX_MODE7)	/* gpmc_ad12.gpio1_28 BT_EN */
		>;
	};

	mmc3_pins: pinmux_mmc3_pins {
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x830, PIN_INPUT_PULLUP | MUX_MODE3)	/* gpmc_ad12.mmc2_dat0 */
			AM33XX_IOPAD(0x834, PIN_INPUT_PULLUP | MUX_MODE3)	/* gpmc_ad13.mmc2_dat1 */
			AM33XX_IOPAD(0x838, PIN_INPUT_PULLUP | MUX_MODE3)	/* gpmc_ad14.mmc2_dat2 */
			AM33XX_IOPAD(0x83c, PIN_INPUT_PULLUP | MUX_MODE3)	/* gpmc_ad15.mmc2_dat3 */
			AM33XX_IOPAD(0x888, PIN_INPUT_PULLUP | MUX_MODE3)	/* gpmc_csn3.mmc2_cmd */
			AM33XX_IOPAD(0x88c, PIN_INPUT_PULLUP | MUX_MODE3)	/* gpmc_clk.mmc2_clk */
		>;
	};

	uart3_pins: pinmux_uart3_pins {
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x934, PIN_INPUT_PULLUP | MUX_MODE1)	/* gmii1_rxd3.uart3_rxd */
			AM33XX_IOPAD(0x938, PIN_OUTPUT_PULLDOWN | MUX_MODE1)	/* gmii1_rxd2.uart3_txd */
			AM33XX_IOPAD(0x948, PIN_INPUT | MUX_MODE3)		/* mdio_data.uart3_ctsn */
			AM33XX_IOPAD(0x94c, PIN_OUTPUT_PULLDOWN | MUX_MODE3)	/* mdio_clk.uart3_rtsn */
		>;
	};

	wl18xx_pins: pinmux_wl18xx_pins {
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x828, PIN_OUTPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad10.gpio0_26 WL_EN */
			AM33XX_IOPAD(0x82C, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad11.gpio0_27 WL_IRQ */
			AM33XX_IOPAD(0x87C, PIN_OUTPUT_PULLUP | MUX_MODE7)	/* gpmc_csn0.gpio1_29 LS_BUF_EN */
		>;
	};
};

&mac {
	status = "disabled";
};

&mmc3 {
	dmas = <&edma_xbar 12 0 1
		&edma_xbar 13 0 2>;
	dma-names = "tx", "rx";
	status = "okay";
	vmmc-supply = <&wlan_en_reg>;
	bus-width = <4>;
	non-removable;
	cap-power-off-card;
	ti,needs-special-hs-handling;
	keep-power-in-suspend;
	pinctrl-names = "default";
	pinctrl-0 = <&mmc3_pins &wl18xx_pins>;

	#address-cells = <1>;
	#size-cells = <0>;
	wlcore: wlcore@2 {
		compatible = "ti,wl1835";
		reg = <2>;
		interrupt-parent = <&gpio0>;
		interrupts = <27 IRQ_TYPE_EDGE_RISING>;
	};
};

&uart3 {
	pinctrl-names = "default";
	pinctrl-0 = <&uart3_pins &bt_pins>;
	status = "okay";

	bluetooth {
		compatible = "ti,wl1835-st";
		enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
	};
};

&gpio1 {
	ls_buf_en {
		gpio-hog;
		gpios = <29 GPIO_ACTIVE_HIGH>;
		output-high;
		line-name = "LS_BUF_EN";
	};
};

/* BT_AUD_OUT from wl1835 has to be pulled low when WL_EN is activated.*/
/* in case it isn't, wilink8 ends up in one of the test modes that     */
/* intruces various issues (elp wkaeup timeouts etc.)                  */
/* On the BBGW this pin is routed through the level shifter (U21) that */
/* introduces a pullup on the line and wilink8 ends up in a bad state. */
/* use a gpio hog to force this pin low. An alternative may be adding  */
/* an external pulldown on U21 pin 4.                                  */

&gpio3 {
	bt_aud_in {
		gpio-hog;
		gpios = <16 GPIO_ACTIVE_HIGH>;
		output-low;
		line-name = "MCASP0_AHCLKR";
	};
};