1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * mdio-boardinfo - Collect pre-declarations for MDIO devices
4 */
5
6#include <linux/kernel.h>
7#include <linux/slab.h>
8#include <linux/export.h>
9#include <linux/mutex.h>
10#include <linux/list.h>
11
12#include "mdio-boardinfo.h"
13
14static LIST_HEAD(mdio_board_list);
15static DEFINE_MUTEX(mdio_board_lock);
16
17/**
18 * mdiobus_setup_mdiodev_from_board_info - create and setup MDIO devices
19 * from pre-collected board specific MDIO information
20 * @bus: Bus the board_info belongs to
21 * @cb: Callback to create device on bus
22 * Context: can sleep
23 */
24void mdiobus_setup_mdiodev_from_board_info(struct mii_bus *bus,
25					   int (*cb)
26					   (struct mii_bus *bus,
27					    struct mdio_board_info *bi))
28{
29	struct mdio_board_entry *be;
30	struct mdio_board_entry *tmp;
31	struct mdio_board_info *bi;
32	int ret;
33
34	mutex_lock(&mdio_board_lock);
35	list_for_each_entry_safe(be, tmp, &mdio_board_list, list) {
36		bi = &be->board_info;
37
38		if (strcmp(bus->id, bi->bus_id))
39			continue;
40
41		mutex_unlock(&mdio_board_lock);
42		ret = cb(bus, bi);
43		mutex_lock(&mdio_board_lock);
44		if (ret)
45			continue;
46
47	}
48	mutex_unlock(&mdio_board_lock);
49}
50EXPORT_SYMBOL(mdiobus_setup_mdiodev_from_board_info);
51
52/**
53 * mdiobus_register_board_info - register MDIO devices for a given board
54 * @info: array of devices descriptors
55 * @n: number of descriptors provided
56 * Context: can sleep
57 *
58 * The board info passed can be marked with __initdata but be pointers
59 * such as platform_data etc. are copied as-is
60 */
61int mdiobus_register_board_info(const struct mdio_board_info *info,
62				unsigned int n)
63{
64	struct mdio_board_entry *be;
65	unsigned int i;
66
67	be = kcalloc(n, sizeof(*be), GFP_KERNEL);
68	if (!be)
69		return -ENOMEM;
70
71	for (i = 0; i < n; i++, be++, info++) {
72		memcpy(&be->board_info, info, sizeof(*info));
73		mutex_lock(&mdio_board_lock);
74		list_add_tail(&be->list, &mdio_board_list);
75		mutex_unlock(&mdio_board_lock);
76	}
77
78	return 0;
79}
80EXPORT_SYMBOL(mdiobus_register_board_info);
81