1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
4 */
5/*
6 * infrastructure for devices connected via I2C
7 */
8
9#include <linux/slab.h>
10#include "via_aux.h"
11
12
13struct via_aux_bus *via_aux_probe(struct i2c_adapter *adap)
14{
15	struct via_aux_bus *bus;
16
17	if (!adap)
18		return NULL;
19
20	bus = kmalloc(sizeof(*bus), GFP_KERNEL);
21	if (!bus)
22		return NULL;
23
24	bus->adap = adap;
25	INIT_LIST_HEAD(&bus->drivers);
26
27	via_aux_edid_probe(bus);
28	via_aux_vt1636_probe(bus);
29	via_aux_vt1632_probe(bus);
30	via_aux_vt1631_probe(bus);
31	via_aux_vt1625_probe(bus);
32	via_aux_vt1622_probe(bus);
33	via_aux_vt1621_probe(bus);
34	via_aux_sii164_probe(bus);
35	via_aux_ch7301_probe(bus);
36
37	return bus;
38}
39
40void via_aux_free(struct via_aux_bus *bus)
41{
42	struct via_aux_drv *pos, *n;
43
44	if (!bus)
45		return;
46
47	list_for_each_entry_safe(pos, n, &bus->drivers, chain) {
48		if (pos->cleanup)
49			pos->cleanup(pos);
50
51		list_del(&pos->chain);
52		kfree(pos->data);
53		kfree(pos);
54	}
55
56	kfree(bus);
57}
58
59const struct fb_videomode *via_aux_get_preferred_mode(struct via_aux_bus *bus)
60{
61	struct via_aux_drv *pos;
62	const struct fb_videomode *mode = NULL;
63
64	if (!bus)
65		return NULL;
66
67	list_for_each_entry(pos, &bus->drivers, chain) {
68		if (pos->get_preferred_mode)
69			mode = pos->get_preferred_mode(pos);
70	}
71
72	return mode;
73}
74