path: root/drivers/net/phy/mdio_bus.c

// SPDX-License-Identifier: GPL-2.0+
/* MDIO Bus interface
 *
 * Author: Andy Fleming
 *
 * Copyright (c) 2004 Freescale Semiconductor, Inc.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/delay.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/gpio/consumer.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/micrel_phy.h>
#include <linux/mii.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/of_device.h>
#include <linux/of_mdio.h>
#include <linux/phy.h>
#include <linux/reset.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#include <linux/unistd.h>

#define CREATE_TRACE_POINTS
#include <trace/events/mdio.h>

#include "mdio-boardinfo.h"

static int mdiobus_register_gpiod(struct mdio_device *mdiodev)
{
	/* Deassert the optional reset signal */
	mdiodev->reset_gpio = gpiod_get_optional(&mdiodev->dev,
						 "reset", GPIOD_OUT_LOW);
	if (IS_ERR(mdiodev->reset_gpio))
		return PTR_ERR(mdiodev->reset_gpio);

	if (mdiodev->reset_gpio)
		gpiod_set_consumer_name(mdiodev->reset_gpio, "PHY reset");

	return 0;
}

static int mdiobus_register_reset(struct mdio_device *mdiodev)
{
	struct reset_control *reset;

	reset = reset_control_get_optional_exclusive(&mdiodev->dev, "phy");
	if (IS_ERR(reset))
		return PTR_ERR(reset);

	mdiodev->reset_ctrl = reset