1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0+
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * mdio-boardinfo - Collect pre-declarations for MDIO devices
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <linux/kernel.h>
7*4882a593Smuzhiyun #include <linux/slab.h>
8*4882a593Smuzhiyun #include <linux/export.h>
9*4882a593Smuzhiyun #include <linux/mutex.h>
10*4882a593Smuzhiyun #include <linux/list.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include "mdio-boardinfo.h"
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun static LIST_HEAD(mdio_board_list);
15*4882a593Smuzhiyun static DEFINE_MUTEX(mdio_board_lock);
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun /**
18*4882a593Smuzhiyun * mdiobus_setup_mdiodev_from_board_info - create and setup MDIO devices
19*4882a593Smuzhiyun * from pre-collected board specific MDIO information
20*4882a593Smuzhiyun * @bus: Bus the board_info belongs to
21*4882a593Smuzhiyun * @cb: Callback to create device on bus
22*4882a593Smuzhiyun * Context: can sleep
23*4882a593Smuzhiyun */
mdiobus_setup_mdiodev_from_board_info(struct mii_bus * bus,int (* cb)(struct mii_bus * bus,struct mdio_board_info * bi))24*4882a593Smuzhiyun void mdiobus_setup_mdiodev_from_board_info(struct mii_bus *bus,
25*4882a593Smuzhiyun int (*cb)
26*4882a593Smuzhiyun (struct mii_bus *bus,
27*4882a593Smuzhiyun struct mdio_board_info *bi))
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun struct mdio_board_entry *be;
30*4882a593Smuzhiyun struct mdio_board_entry *tmp;
31*4882a593Smuzhiyun struct mdio_board_info *bi;
32*4882a593Smuzhiyun int ret;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun mutex_lock(&mdio_board_lock);
35*4882a593Smuzhiyun list_for_each_entry_safe(be, tmp, &mdio_board_list, list) {
36*4882a593Smuzhiyun bi = &be->board_info;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun if (strcmp(bus->id, bi->bus_id))
39*4882a593Smuzhiyun continue;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun mutex_unlock(&mdio_board_lock);
42*4882a593Smuzhiyun ret = cb(bus, bi);
43*4882a593Smuzhiyun mutex_lock(&mdio_board_lock);
44*4882a593Smuzhiyun if (ret)
45*4882a593Smuzhiyun continue;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun mutex_unlock(&mdio_board_lock);
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun EXPORT_SYMBOL(mdiobus_setup_mdiodev_from_board_info);
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun /**
53*4882a593Smuzhiyun * mdio_register_board_info - register MDIO devices for a given board
54*4882a593Smuzhiyun * @info: array of devices descriptors
55*4882a593Smuzhiyun * @n: number of descriptors provided
56*4882a593Smuzhiyun * Context: can sleep
57*4882a593Smuzhiyun *
58*4882a593Smuzhiyun * The board info passed can be marked with __initdata but be pointers
59*4882a593Smuzhiyun * such as platform_data etc. are copied as-is
60*4882a593Smuzhiyun */
mdiobus_register_board_info(const struct mdio_board_info * info,unsigned int n)61*4882a593Smuzhiyun int mdiobus_register_board_info(const struct mdio_board_info *info,
62*4882a593Smuzhiyun unsigned int n)
63*4882a593Smuzhiyun {
64*4882a593Smuzhiyun struct mdio_board_entry *be;
65*4882a593Smuzhiyun unsigned int i;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun be = kcalloc(n, sizeof(*be), GFP_KERNEL);
68*4882a593Smuzhiyun if (!be)
69*4882a593Smuzhiyun return -ENOMEM;
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun for (i = 0; i < n; i++, be++, info++) {
72*4882a593Smuzhiyun memcpy(&be->board_info, info, sizeof(*info));
73*4882a593Smuzhiyun mutex_lock(&mdio_board_lock);
74*4882a593Smuzhiyun list_add_tail(&be->list, &mdio_board_list);
75*4882a593Smuzhiyun mutex_unlock(&mdio_board_lock);
76*4882a593Smuzhiyun }
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun return 0;
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun EXPORT_SYMBOL(mdiobus_register_board_info);
81