diff options
Diffstat (limited to 'drivers/usb/phy/isp1301.c')
-rw-r--r-- | drivers/usb/phy/isp1301.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/usb/phy/isp1301.c b/drivers/usb/phy/isp1301.c new file mode 100644 index 00000000000..b19f4932a03 --- /dev/null +++ b/drivers/usb/phy/isp1301.c | |||
@@ -0,0 +1,77 @@ | |||
1 | /* | ||
2 | * NXP ISP1301 USB transceiver driver | ||
3 | * | ||
4 | * Copyright (C) 2012 Roland Stigge | ||
5 | * | ||
6 | * Author: Roland Stigge <stigge@antcom.de> | ||
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 version 2 as | ||
10 | * published by the Free Software Foundation. | ||
11 | */ | ||
12 | |||
13 | #include <linux/module.h> | ||
14 | #include <linux/i2c.h> | ||
15 | |||
16 | #define DRV_NAME "isp1301" | ||
17 | |||
18 | #define ISP1301_I2C_ADDR 0x2C | ||
19 | |||
20 | static const unsigned short normal_i2c[] = { | ||
21 | ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END | ||
22 | }; | ||
23 | |||
24 | static const struct i2c_device_id isp1301_id[] = { | ||
25 | { "isp1301", 0 }, | ||
26 | { } | ||
27 | }; | ||
28 | |||
29 | static struct i2c_client *isp1301_i2c_client; | ||
30 | |||
31 | static int isp1301_probe(struct i2c_client *client, | ||
32 | const struct i2c_device_id *i2c_id) | ||
33 | { | ||
34 | isp1301_i2c_client = client; | ||
35 | return 0; | ||
36 | } | ||
37 | |||
38 | static int isp1301_remove(struct i2c_client *client) | ||
39 | { | ||
40 | return 0; | ||
41 | } | ||
42 | |||
43 | static struct i2c_driver isp1301_driver = { | ||
44 | .driver = { | ||
45 | .name = DRV_NAME, | ||
46 | }, | ||
47 | .probe = isp1301_probe, | ||
48 | .remove = isp1301_remove, | ||
49 | .id_table = isp1301_id, | ||
50 | }; | ||
51 | |||
52 | module_i2c_driver(isp1301_driver); | ||
53 | |||
54 | static int match(struct device *dev, void *data) | ||
55 | { | ||
56 | struct device_node *node = (struct device_node *)data; | ||
57 | return (dev->of_node == node) && | ||
58 | (dev->driver == &isp1301_driver.driver); | ||
59 | } | ||
60 | |||
61 | struct i2c_client *isp1301_get_client(struct device_node *node) | ||
62 | { | ||
63 | if (node) { /* reference of ISP1301 I2C node via DT */ | ||
64 | struct device *dev = bus_find_device(&i2c_bus_type, NULL, | ||
65 | node, match); | ||
66 | if (!dev) | ||
67 | return NULL; | ||
68 | return to_i2c_client(dev); | ||
69 | } else { /* non-DT: only one ISP1301 chip supported */ | ||
70 | return isp1301_i2c_client; | ||
71 | } | ||
72 | } | ||
73 | EXPORT_SYMBOL_GPL(isp1301_get_client); | ||
74 | |||
75 | MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>"); | ||
76 | MODULE_DESCRIPTION("NXP ISP1301 USB transceiver driver"); | ||
77 | MODULE_LICENSE("GPL"); | ||