tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 * @mdiodev: MDIO device pointer
21 * Context: can sleep
22 */
23void mdiobus_setup_mdiodev_from_board_info(struct mii_bus *bus,
24 int (*cb)
25 (struct mii_bus *bus,
26 struct mdio_board_info *bi))
27{
28 struct mdio_board_entry *be;
29 struct mdio_board_entry *tmp;
30 struct mdio_board_info *bi;
31 int ret;
32
33 mutex_lock(&mdio_board_lock);
34 list_for_each_entry_safe(be, tmp, &mdio_board_list, list) {
35 bi = &be->board_info;
36
37 if (strcmp(bus->id, bi->bus_id))
38 continue;
39
40 mutex_unlock(&mdio_board_lock);
41 ret = cb(bus, bi);
42 mutex_lock(&mdio_board_lock);
43 if (ret)
44 continue;
45
46 }
47 mutex_unlock(&mdio_board_lock);
48}
49EXPORT_SYMBOL(mdiobus_setup_mdiodev_from_board_info);
50
51/**
52 * mdio_register_board_info - register MDIO devices for a given board
53 * @info: array of devices descriptors
54 * @n: number of descriptors provided
55 * Context: can sleep
56 *
57 * The board info passed can be marked with __initdata but be pointers
58 * such as platform_data etc. are copied as-is
59 */
60int mdiobus_register_board_info(const struct mdio_board_info *info,
61 unsigned int n)
62{
63 struct mdio_board_entry *be;
64 unsigned int i;
65
66 be = kcalloc(n, sizeof(*be), GFP_KERNEL);
67 if (!be)
68 return -ENOMEM;
69
70 for (i = 0; i < n; i++, be++, info++) {
71 memcpy(&be->board_info, info, sizeof(*info));
72 mutex_lock(&mdio_board_lock);
73 list_add_tail(&be->list, &mdio_board_list);
74 mutex_unlock(&mdio_board_lock);
75 }
76
77 return 0;
78}
79EXPORT_SYMBOL(mdiobus_register_board_info);