projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 8b7c3b68 RS |
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"); |