linux/drivers/net/mdio/mdio-mux-mmioreg.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Simple memory-mapped device MDIO MUX driver
 *
 * Author: Timur Tabi <[email protected]>
 *
 * Copyright 2012 Freescale Semiconductor, Inc.
 */

#include <linux/device.h>
#include <linux/mdio-mux.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_mdio.h>
#include <linux/phy.h>
#include <linux/platform_device.h>

struct mdio_mux_mmioreg_state { … };

/*
 * MDIO multiplexing switch function
 *
 * This function is called by the mdio-mux layer when it thinks the mdio bus
 * multiplexer needs to switch.
 *
 * 'current_child' is the current value of the mux register (masked via
 * s->mask).
 *
 * 'desired_child' is the value of the 'reg' property of the target child MDIO
 * node.
 *
 * The first time this function is called, current_child == -1.
 *
 * If current_child == desired_child, then the mux is already set to the
 * correct bus.
 */
static int mdio_mux_mmioreg_switch_fn(int current_child, int desired_child,
				      void *data)
{ … }

static int mdio_mux_mmioreg_probe(struct platform_device *pdev)
{ … }

static void mdio_mux_mmioreg_remove(struct platform_device *pdev)
{ … }

static const struct of_device_id mdio_mux_mmioreg_match[] = …;
MODULE_DEVICE_TABLE(of, mdio_mux_mmioreg_match);

static struct platform_driver mdio_mux_mmioreg_driver = …;

module_platform_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;