4 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
6 * Author: Sourav Poddar <sourav.poddar@ti.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; GPL v2.
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/slab.h>
18 #include <linux/i2c.h>
19 #include <linux/gpio.h>
20 #include <linux/workqueue.h>
21 #include <linux/irq.h>
22 #include <linux/regmap.h>
23 #include <linux/err.h>
24 #include <linux/mfd/core.h>
25 #include <linux/mfd/smsc.h>
26 #include <linux/of_platform.h>
28 static struct regmap_config smsc_regmap_config = {
31 .max_register = SMSC_VEN_ID_H,
32 .cache_type = REGCACHE_RBTREE,
35 static int smsc_i2c_probe(struct i2c_client *i2c,
36 const struct i2c_device_id *id)
39 int devid, rev, venid_l, venid_h;
42 smsc = devm_kzalloc(&i2c->dev, sizeof(struct smsc),
45 dev_err(&i2c->dev, "smsc mfd driver memory allocation failed\n");
49 smsc->regmap = devm_regmap_init_i2c(i2c, &smsc_regmap_config);
50 if (IS_ERR(smsc->regmap)) {
51 ret = PTR_ERR(smsc->regmap);
55 i2c_set_clientdata(i2c, smsc);
56 smsc->dev = &i2c->dev;
59 of_property_read_u32(i2c->dev.of_node, "clock", &smsc->clk);
62 regmap_read(smsc->regmap, SMSC_DEV_ID, &devid);
63 regmap_read(smsc->regmap, SMSC_DEV_REV, &rev);
64 regmap_read(smsc->regmap, SMSC_VEN_ID_L, &venid_l);
65 regmap_read(smsc->regmap, SMSC_VEN_ID_H, &venid_h);
67 dev_info(&i2c->dev, "SMSCxxx devid: %02x rev: %02x venid: %02x\n",
68 devid, rev, (venid_h << 8) | venid_l);
70 ret = regmap_write(smsc->regmap, SMSC_CLK_CTRL, smsc->clk);
76 ret = of_platform_populate(i2c->dev.of_node,
77 NULL, NULL, &i2c->dev);
84 static int smsc_i2c_remove(struct i2c_client *i2c)
86 struct smsc *smsc = i2c_get_clientdata(i2c);
88 mfd_remove_devices(smsc->dev);
93 static const struct i2c_device_id smsc_i2c_id[] = {
97 MODULE_DEVICE_TABLE(i2c, smsc_i2c_id);
99 static struct i2c_driver smsc_i2c_driver = {
102 .owner = THIS_MODULE,
104 .probe = smsc_i2c_probe,
105 .remove = smsc_i2c_remove,
106 .id_table = smsc_i2c_id,
109 module_i2c_driver(smsc_i2c_driver);
111 MODULE_AUTHOR("Sourav Poddar <sourav.poddar@ti.com>");
112 MODULE_DESCRIPTION("SMSC chip multi-function driver");
113 MODULE_LICENSE("GPL v2");