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
14 static LIST_HEAD(mdio_board_list);
15 static 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 */
mdiobus_setup_mdiodev_from_board_info(struct mii_bus * bus,int (* cb)(struct mii_bus * bus,struct mdio_board_info * bi))24 void 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 }
50 EXPORT_SYMBOL(mdiobus_setup_mdiodev_from_board_info);
51
52 /**
53 * mdio_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 */
mdiobus_register_board_info(const struct mdio_board_info * info,unsigned int n)61 int 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 }
80 EXPORT_SYMBOL(mdiobus_register_board_info);
81
