ARM: dts: imx6qdl-sr-som: add support for TI Wi-Fi

/*

 * Copyright (C) 2013,2014 Russell King

 *

 * This file is dual-licensed: you can use it either under the terms

 * of the GPL or the X11 license, at your option. Note that this dual

 * licensing only applies to this file, and not this project as a

 * whole.

 *

 *  a) This file 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.

 *

 *     This file is distributed in the hope that it will be useful,

 *     but WITHOUT ANY WARRANTY; without even the implied warranty of

 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *     GNU General Public License for more details.

 *

 * Or, alternatively,

 *

 *  b) Permission is hereby granted, free of charge, to any person

 *     obtaining a copy of this software and associated documentation

 *     files (the "Software"), to deal in the Software without

 *     restriction, including without limitation the rights to use,

 *     copy, modify, merge, publish, distribute, sublicense, and/or

 *     sell copies of the Software, and to permit persons to whom the

 *     Software is furnished to do so, subject to the following

 *     conditions:

 *

 *     The above copyright notice and this permission notice shall be

 *     included in all copies or substantial portions of the Software.

 *

 *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES

 *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT

 *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,

 *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

 *     OTHER DEALINGS IN THE SOFTWARE.

 */

#include <dt-bindings/gpio/gpio.h>

/ {

	nvcc_sd1: regulator-nvcc-sd1 {

		compatible = "regulator-fixed";

		regulator-always-on;

		regulator-name = "nvcc_sd1";

		regulator-min-microvolt = <1800000>;

		regulator-max-microvolt = <1800000>;

		vin-supply = <&vcc_3v3>;

	};

	clk_ti_wifi: ti-wifi-clock {

		/* This is a hack around the kernel - using "fixed clock"

		 * results in the "pinctrl" properties being ignored, and

		 * the clock not being output.  Instead, use a gated clock

		 * and the unrouted WL_XTAL_PU gpio.

		 */

		compatible = "gpio-gate-clock";

		#clock-cells = <0>;

		clock-frequency = <32768>;

		pinctrl-names = "default";

		pinctrl-0 = <&pinctrl_microsom_ti_clk>;

		enable-gpios = <&gpio5 5 GPIO_ACTIVE_HIGH>;

	};

	pwrseq_ti_wifi: ti-wifi-pwrseq {

		compatible = "mmc-pwrseq-simple";

		pinctrl-names = "default";

		pinctrl-0 = <&pinctrl_microsom_ti_wifi_en>;

		reset-gpios = <&gpio5 26 GPIO_ACTIVE_LOW>;

		post-power-on-delay-ms = <200>;

		clocks = <&clk_ti_wifi>;

		clock-names = "ext_clock";

	};

};

&iomuxc {

	microsom {

		pinctrl_microsom_ti_bt: microsom-ti-bt {

			fsl,pins = <

				/* BT_EN_SOC */

				MX6QDL_PAD_CSI0_DAT14__GPIO6_IO00	0x40013070

			>;

		};

		pinctrl_microsom_ti_clk: microsom-ti-clk {

			fsl,pins = <

				/* EXT_32K */

				MX6QDL_PAD_GPIO_8__XTALOSC_REF_CLK_32K	0x1b0b0

				/* WL_XTAL_PU (unrouted) */

				MX6QDL_PAD_DISP0_DAT11__GPIO5_IO05 0x40013070

			>;

		};

		pinctrl_microsom_ti_wifi_en: microsom-ti-wifi-en {

			fsl,pins = <

				/* WLAN_EN_SOC */

				MX6QDL_PAD_CSI0_DAT8__GPIO5_IO26	0x40013070

			>;

		};

		pinctrl_microsom_ti_wifi_irq: microsom-ti-wifi-irq {

			fsl,pins = <

				/* WLAN_IRQ */

				MX6QDL_PAD_CSI0_DAT18__GPIO6_IO04	0x40013070

			>;

		};

		pinctrl_microsom_uart4: microsom-uart4 {

			fsl,pins = <

				MX6QDL_PAD_CSI0_DAT12__UART4_TX_DATA 0x1b0b1

				MX6QDL_PAD_CSI0_DAT13__UART4_RX_DATA 0x1b0b1

				MX6QDL_PAD_CSI0_DAT16__UART4_RTS_B 0x1b0b1

				MX6QDL_PAD_CSI0_DAT17__UART4_CTS_B 0x1b0b1

			>;

		};

		pinctrl_microsom_usdhc1: microsom-usdhc1 {

			fsl,pins = <

				MX6QDL_PAD_SD1_CMD__SD1_CMD    0x17059

				MX6QDL_PAD_SD1_CLK__SD1_CLK    0x10059

				MX6QDL_PAD_SD1_DAT0__SD1_DATA0 0x17059

				MX6QDL_PAD_SD1_DAT1__SD1_DATA1 0x17059

				MX6QDL_PAD_SD1_DAT2__SD1_DATA2 0x17059

				MX6QDL_PAD_SD1_DAT3__SD1_DATA3 0x17059

			>;

		};

	};

};

/* UART4 - Connected to optional TI Wi-Fi/BT/FM */

&uart4 {

	pinctrl-names = "default";

	pinctrl-0 = <&pinctrl_microsom_uart4>;

	uart-has-rtscts;

	status = "okay";

	bluetooth {

		compatible = "ti,wl1837-st";

		clocks = <&clk_ti_wifi>;

		clock-names = "ext_clock";

		enable-gpios = <&gpio6 0 GPIO_ACTIVE_HIGH>;

		pinctrl-names = "default";

		pinctrl-0 = <&pinctrl_microsom_ti_bt>;

	};

};

/* USDHC1 - Connected to optional TI Wi-Fi/BT/FM */

&usdhc1 {

	pinctrl-names = "default";

	pinctrl-0 = <&pinctrl_microsom_usdhc1>;

	bus-width = <4>;

	keep-power-in-suspend;

	mmc-pwrseq = <&pwrseq_ti_wifi>;

	non-removable;

	vmmc-supply = <&vcc_3v3>;

	/* vqmmc-supply = <&nvcc_sd1>; - MMC layer doesn't like it! */

	status = "okay";

	#address-cells = <1>;

	#size-cells = <0>;

	wlcore@2 {

		compatible = "ti,wl1837";

		reg = <2>;

		interrupts-extended = <&gpio6 4 IRQ_TYPE_LEVEL_HIGH>;

		pinctrl-names = "default";

		pinctrl-0 = <&pinctrl_microsom_ti_wifi_irq>;

	};

};