Commit | Line | Data |
---|---|---|
612212a3 JF |
1 | /* |
2 | * OF helpers for the I2C API | |
3 | * | |
4 | * Copyright (c) 2008 Jochen Friedrich <jochen@scram.de> | |
5 | * | |
6 | * Based on a previous patch from Jon Smirl <jonsmirl@gmail.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/i2c.h> | |
15 | #include <linux/of.h> | |
f40987b6 | 16 | #include <linux/of_i2c.h> |
138decf8 | 17 | #include <linux/module.h> |
612212a3 | 18 | |
612212a3 JF |
19 | void of_register_i2c_devices(struct i2c_adapter *adap, |
20 | struct device_node *adap_node) | |
21 | { | |
22 | void *result; | |
23 | struct device_node *node; | |
24 | ||
25 | for_each_child_of_node(adap_node, node) { | |
26 | struct i2c_board_info info = {}; | |
27 | const u32 *addr; | |
28 | int len; | |
29 | ||
3f07af49 GL |
30 | if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) |
31 | continue; | |
32 | ||
612212a3 JF |
33 | addr = of_get_property(node, "reg", &len); |
34 | if (!addr || len < sizeof(int) || *addr > (1 << 10) - 1) { | |
35 | printk(KERN_ERR | |
36 | "of-i2c: invalid i2c device entry\n"); | |
37 | continue; | |
38 | } | |
39 | ||
40 | info.irq = irq_of_parse_and_map(node, 0); | |
612212a3 | 41 | |
612212a3 JF |
42 | info.addr = *addr; |
43 | ||
0721357d | 44 | request_module("%s", info.type); |
612212a3 JF |
45 | |
46 | result = i2c_new_device(adap, &info); | |
47 | if (result == NULL) { | |
48 | printk(KERN_ERR | |
49 | "of-i2c: Failed to load driver for %s\n", | |
50 | info.type); | |
51 | irq_dispose_mapping(info.irq); | |
52 | continue; | |
53 | } | |
54 | } | |
55 | } | |
56 | EXPORT_SYMBOL(of_register_i2c_devices); | |
138decf8 AB |
57 | |
58 | MODULE_LICENSE("GPL"); |