_ov_board_pcie-modem_ccimx8x-sbc-pro.dts

/*
 * Copyright 2020 Digi International Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

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

/dts-v1/;
/plugin/;

/ {
	fragment@0 {
		target-path = "/";
		__overlay__ {
			overlay-description = "SBC: PCIe Modems";
		};
	};


	/* Adjust reset-delay-us depending on your modem, this seems to work
	 * with most of Telit modems.
	 */
	fragment@1 {
		target-path = "/";
		__overlay__ {
			pcie_modem_reset: modem_reset {
				compatible = "gpio-reset";
				reset-gpios = <&lsio_gpio3 16 GPIO_ACTIVE_LOW>;
				reset-delay-us = <21000>;
				#reset-cells = <0>;
			};
		};
	};

	/*
	 * Define regulator, reset, and disable lines, used by USB modems on the PCIe
	 * connector.
	 */
	fragment@2 {
		target = <&pcieb>;
		__overlay__ {
			resets = <&pcie_modem_reset>;
			disable-gpio = <&lsio_gpio0 30 GPIO_ACTIVE_HIGH>;
			vpcie-supply = <&reg_3v3_pcie>;
			status = "okay";
		};
	};


	/* Enable the pcie regulator */
	fragment@3 {
		target = <&reg_3v3_pcie>;
		__overlay__ {
			status = "okay";
		};
	};
};